iOSNotesForProfessionals.pdf

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iOS
Developer
iOS Developer
Notes for Professionals
®
Notes for Professionals
of professional hints and tricks
800+ pages
GoalKicker.com
Free Programming Books
Disclaimer
This is an unocial free book created for educational purposes and is
not aliated with ocial iOS
®
Developer group(s) or company(s).
All trademarks and registered trademarks are
the property of their respective owners
Contents
About
................................................................................................................................................................................... 1
Chapter 1: Getting started with iOS
..................................................................................................................... 2
Section 1.1: Creating a default Single View Application
............................................................................................. 2
Section 1.2: Hello World
................................................................................................................................................. 6
Section 1.3: Xcode Interface
....................................................................................................................................... 11
Section 1.4: Create your first program in Swift 3
...................................................................................................... 17
Chapter 2: UILabel
...................................................................................................................................................... 22
Section 2.1: Create a UILabel
...................................................................................................................................... 22
Section 2.2: Number of Lines
..................................................................................................................................... 24
Section 2.3: Set Font
.................................................................................................................................................... 25
Section 2.4: Text Color
................................................................................................................................................ 26
Section 2.5: Background Color
.................................................................................................................................. 27
Section 2.6: Size to fit
.................................................................................................................................................. 27
Section 2.7: Text alignment
........................................................................................................................................ 30
Section 2.8: Calculate Content Bounds (for i.e. dynamic cell heights)
.................................................................. 30
Section 2.9: Label Attributed Text
.............................................................................................................................. 32
Section 2.10: Clickable Label
...................................................................................................................................... 38
Section 2.11: Variable height using constraints
......................................................................................................... 39
Section 2.12: LineBreakMode
...................................................................................................................................... 39
Section 2.13: Add shadows to text
............................................................................................................................. 41
Section 2.14: Changing Text in an Existing Label
..................................................................................................... 41
Section 2.15: Auto-size label to fit text
....................................................................................................................... 42
Section 2.16: Get UILabel's size strictly based on its text and font
......................................................................... 43
Section 2.17: Highlighted and Highlighted Text Color
.............................................................................................. 44
Section 2.18: Justify Text
............................................................................................................................................ 44
Section 2.19: Dynamic label frame from unknown text length
............................................................................... 45
Chapter 3: UILabel text underlining
.................................................................................................................. 47
Section 3.1: Underlining a text in a UILabel using Objective C
................................................................................ 47
Section 3.2: Underlining a text in UILabel using Swift
.............................................................................................. 47
Chapter 4: attributedText in UILabel
............................................................................................................... 48
Section 4.1: HTML text in UILabel
............................................................................................................................... 48
Section 4.2: Set dierent property to text in single UILabel
................................................................................... 48
Chapter 5: UIButton
................................................................................................................................................... 50
Section 5.1: Creating a UIButton
................................................................................................................................ 50
Section 5.2: Attaching a Method to a Button
........................................................................................................... 50
Section 5.3: Setting Font
............................................................................................................................................. 51
Section 5.4: Set Image
................................................................................................................................................ 51
Section 5.5: Get UIButton's size strictly based on its text and font
........................................................................ 51
Section 5.6: Disabling a UIButton
............................................................................................................................... 52
Section 5.7: Set title
..................................................................................................................................................... 52
Section 5.8: Set title color
........................................................................................................................................... 52
Section 5.9: Horizontally aligning contents
.............................................................................................................. 53
Section 5.10: Getting the title label
............................................................................................................................. 53
Section 5.11: Adding an action to an UIButton via Code (programmatically)
....................................................... 54
Chapter 6: UIDatePicker
.......................................................................................................................................... 55
Section 6.1: Create a Date Picker
............................................................................................................................... 55
Section 6.2: Setting Minimum-Maximum Date
......................................................................................................... 55
Section 6.3: Modes
....................................................................................................................................................... 55
Section 6.4: Setting minute interval
........................................................................................................................... 55
Section 6.5: Count Down Duration
............................................................................................................................. 56
Chapter 7: UILocalNotification
............................................................................................................................ 57
Section 7.1: Scheduling a local notification
............................................................................................................... 57
Section 7.2: Presenting a local notification immediately
........................................................................................ 57
Section 7.3: Managing local notifications using UUID
............................................................................................. 58
Section 7.4: Registering for local notifications
......................................................................................................... 59
Section 7.5: what's new in UILocalNotification with iOS10
....................................................................................... 59
Section 7.6: Responding to received local notification
............................................................................................ 62
Section 7.7: Register and Schedule Local Notification in Swift 3.0 (iOS 10)
........................................................... 62
Chapter 8: UIImage
.................................................................................................................................................... 64
Section 8.1: Creating UIImage
.................................................................................................................................... 64
Section 8.2: Comparing Images
................................................................................................................................. 65
Section 8.3: Gradient Image with Colors
................................................................................................................... 66
Section 8.4: Convert UIImage to/from base64 encoding
....................................................................................... 66
Section 8.5: Take a Snapshot of a UIView
................................................................................................................ 66
Section 8.6: Change UIImage Color
........................................................................................................................... 67
Section 8.7: Apply UIColor to UIImage
...................................................................................................................... 67
Section 8.8: Creating and Initializing Image Objects with file contents
................................................................. 68
Section 8.9: Resizable image with caps
.................................................................................................................... 68
Section 8.10: Gradient Background Layer for Bounds
............................................................................................ 69
Chapter 9: Convert NSAttributedString to UIImage
................................................................................. 70
Section 9.1: NSAttributedString to UIImage Conversion
.......................................................................................... 70
Chapter 10: UIImagePickerController
............................................................................................................... 71
Section 10.1: Generic usage of UIImagePickerController
......................................................................................... 71
Chapter 11: UIImageView
......................................................................................................................................... 73
Section 11.1: UIImage masked with Label
.................................................................................................................. 73
Section 11.2: Making an image into a circle or rounded
.......................................................................................... 73
Section 11.3: How the Mode property aects an image
.......................................................................................... 74
Section 11.4: Animating a UIImageView
..................................................................................................................... 80
Section 11.5: Create a UIImageView
........................................................................................................................... 81
Section 11.6: Change color of an image
.................................................................................................................... 81
Section 11.7: Assigning an image to a UIImageView
................................................................................................ 81
Chapter 12: Resizing UIImage
............................................................................................................................... 83
Section 12.1: Resize any image by size & quality
...................................................................................................... 83
Chapter 13: Cut a UIImage into a circle
........................................................................................................... 84
Section 13.1: Cut a image into a circle - Objective C
................................................................................................ 84
Section 13.2: SWIFT 3 Example
................................................................................................................................... 85
Chapter 14: UITableView
......................................................................................................................................... 87
Section 14.1: Self-Sizing Cells
....................................................................................................................................... 87
Section 14.2: Custom Cells
.......................................................................................................................................... 87
Section 14.3: Separator Lines
...................................................................................................................................... 90
Section 14.4: Delegate and Datasource
.................................................................................................................... 92
Section 14.5: Creating a UITableView
........................................................................................................................ 98
Section 14.6: Swipe to Delete Rows
......................................................................................................................... 102
Section 14.7: Expanding & Collapsing UITableViewCells
....................................................................................... 105
Chapter 15: UITableViewController
................................................................................................................. 108
Section 15.1: TableView with dynamic properties with tableviewCellStyle basic
................................................ 108
Section 15.2: TableView with Custom Cell
............................................................................................................... 109
Chapter 16: UIRefreshControl TableView
..................................................................................................... 111
Section 16.1: Set up refreshControl on tableView:
.................................................................................................. 111
Section 16.2: Objective-C Example
.......................................................................................................................... 111
Chapter 17: UITableViewCell
............................................................................................................................... 113
Section 17.1: Xib file of UITableViewCell
................................................................................................................... 113
Chapter 18: Custom methods of selection of UITableViewCells
....................................................... 114
Section 18.1: Distinction between single and double selection on row
................................................................. 114
Chapter 19: Custom methods of selection of UITableViewCells
....................................................... 115
Section 19.1: Distinction between single and double selection on row
................................................................. 115
Chapter 20: UIView
.................................................................................................................................................. 116
Section 20.1: Make the view rounded
...................................................................................................................... 116
Section 20.2: Using IBInspectable and IBDesignable
............................................................................................ 118
Section 20.3: Taking a snapshot
.............................................................................................................................. 121
Section 20.4: Create a UIView
.................................................................................................................................. 121
Section 20.5: Shake a View
...................................................................................................................................... 121
Section 20.6: Utilizing Intrinsic Content Size
........................................................................................................... 121
Section 20.7: Programmatically manage UIView insertion and deletion into and from another UIView
............................................................................................................................................................................. 124
Section 20.8: Create UIView using Autolayout
....................................................................................................... 125
Section 20.9: Animating a UIView
............................................................................................................................ 127
Section 20.10: UIView extension for size and frame attributes
............................................................................ 127
Chapter 21: Snapshot of UIView
........................................................................................................................ 129
Section 21.1: Getting the Snapshot
........................................................................................................................... 129
Section 21.2: Snapshot with subview with other markup and text
....................................................................... 129
Chapter 22: UIAlertController
............................................................................................................................. 131
Section 22.1: AlertViews with UIAlertController
...................................................................................................... 131
Section 22.2: Action Sheets with UIAlertController
................................................................................................ 132
Section 22.3: Adding Text Field in UIAlertController like a prompt Box
.............................................................. 134
Section 22.4: Highlighting an action button
........................................................................................................... 135
Section 22.5: Displaying and handling alerts
......................................................................................................... 136
Chapter 23: UIColor
................................................................................................................................................. 140
Section 23.1: Creating a UIColor
............................................................................................................................... 140
Section 23.2: Creating a UIColor from hexadecimal number or string
............................................................... 141
Section 23.3: Color with Alpha component
............................................................................................................. 143
Section 23.4: Undocumented Methods
................................................................................................................... 144
Section 23.5: UIColor from an image pattern
........................................................................................................ 145
Section 23.6: Lighter and Darker Shade of a given UIColor
................................................................................. 146
Section 23.7: Make user defined attributes apply the CGColor datatype
........................................................... 147
Chapter 24: UITextView
........................................................................................................................................ 148
Section 24.1: Set attributed text
............................................................................................................................... 148
Section 24.2: Change font
........................................................................................................................................ 148
Section 24.3: Auto Detect Links, Addresses, Dates, and more
............................................................................. 148
Section 24.4: Change text
......................................................................................................................................... 149
Section 24.5: Change text alignment
...................................................................................................................... 149
Section 24.6: UITextViewDelegate methods
.......................................................................................................... 149
Section 24.7: Change text color
............................................................................................................................... 150
Section 24.8: Remove extra paddings to fit to a precisely measured text
......................................................... 150
Section 24.9: Getting and Setting the Cursor Postition
......................................................................................... 150
Section 24.10: UITextView with HTML text
.............................................................................................................. 152
Section 24.11: Check to see if empty or nil
.............................................................................................................. 152
Chapter 25: UITextField Delegate
.................................................................................................................... 153
Section 25.1: Actions when a user has started/ended interacting with a textfield
............................................. 153
Section 25.2: UITextField - Restrict textfield to certain characters
...................................................................... 154
Chapter 26: UINavigationController
............................................................................................................... 155
Section 26.1: Embed a view controller in a navigation controller programmatically
........................................ 155
Section 26.2: Popping in a Navigation Controller
.................................................................................................. 155
Section 26.3: Purpose
................................................................................................................................................ 155
Section 26.4: Pushing a view controller onto the navigation stack
..................................................................... 156
Section 26.5: Creating a NavigationController
....................................................................................................... 156
Chapter 27: UIGestureRecognizer
.................................................................................................................... 157
Section 27.1: UITapGestureRecognizer
................................................................................................................... 157
Section 27.2: UITapGestureRecognizer (Double Tap)
.......................................................................................... 158
Section 27.3: Adding a Gesture recognizer in the Interface Builder
.................................................................... 158
Section 27.4: UILongPressGestureRecognizer
....................................................................................................... 159
Section 27.5: UISwipeGestureRecognizer
............................................................................................................... 160
Section 27.6: UIPinchGestureRecognizer
................................................................................................................ 161
Section 27.7: UIRotationGestureRecognizer
........................................................................................................... 162
Chapter 28: UIBarButtonItem
............................................................................................................................ 163
Section 28.1: Creating a UIBarButtonItem in the Interface Builder
...................................................................... 163
Section 28.2: Creating a UIBarButtonItem
............................................................................................................. 166
Section 28.3: Bar Button Item Original Image with no Tint Color
........................................................................ 166
Chapter 29: UIScrollView
....................................................................................................................................... 167
Section 29.1: Scrolling content with Auto Layout enabled
.................................................................................... 167
Section 29.2: Create a UIScrollView
........................................................................................................................ 170
Section 29.3: ScrollView with AutoLayout
............................................................................................................... 170
Section 29.4: Detecting when UIScrollView finished scrolling with delegate methods
...................................... 175
Section 29.5: Enable/Disable Scrolling
................................................................................................................... 175
Section 29.6: Zoom In/Out UIImageView
............................................................................................................... 176
Section 29.7: Scroll View Content Size
..................................................................................................................... 177
Section 29.8: Restrict scrolling direction
................................................................................................................. 177
Chapter 30: UIStackView
...................................................................................................................................... 178
Section 30.1: Center Buttons with UIStackview
....................................................................................................... 178
Section 30.2: Create a horizontal stack view programmatically
......................................................................... 182
Section 30.3: Create a vertical stack view programmatically
.............................................................................. 183
Chapter 31: Dynamically updating a UIStackView
.................................................................................. 184
Section 31.1: Connect the UISwitch to an action we can animate switching between a horizontal or vertical
layout of the image views
................................................................................................................................ 184
Chapter 32: UIScrollView with StackView child
......................................................................................... 185
Section 32.1: A complex StackView inside Scrollview Example
............................................................................. 185
Section 32.2: Preventing ambiguous layout
........................................................................................................... 186
Section 32.3: Scrolling to content inside nested StackViews
................................................................................ 187
Chapter 33: UIScrollView AutoLayout
............................................................................................................ 188
Section 33.1: ScrollableController
............................................................................................................................. 188
Section 33.2: UIScrollView dynamic content size through Storyboard
............................................................... 192
Chapter 34: UITextField
......................................................................................................................................... 194
Section 34.1: Get Keyboard Focus and Hide Keyboard
........................................................................................ 194
Section 34.2: Dismiss keyboard when user pushes the return button
................................................................. 194

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