IOS: Text correlation (18-01-22 more), ios18-01-22

IOS: Text correlation (18-01-22 more), ios18-01-22

0. Preface

1. Tips

UILabel class:

1-1-1). If you want to set a line spacing rich text with a ellipsis, you need to set it to be omitted again (the setting will expire during initialization ).

UITextField class:

1-2-1.

UITextView class:

1-3-1), UITextView can only be centered on the X axis, the Y axis needs to be manually adjusted.

 

UITextField and UITextView have the following classes:

1-4-1). A ToolBar with the "finish" button on the right is displayed on the keyboard.

1-4-2), Protocol UITextInputTraits (automatic upper case, error correction, keyboard-related ).

 

 

 

 

 

0. Preface

1. UILabel:

1. No built-in selection or replication function

2. No placeholders

3. Multiple rows

2. UITextField:

1,

2. There are placeholders

3. One row

 

3. UITextView:

1,

2. No placeholders

3. Multiple rows

 

1. tips:

UILabel class:

1-1-1). If you want to set a line spacing rich text with a ellipsis, you need to set it to be omitted again (the setting will expire during initialization ).

// End with "..." self. contentLabel. lineBreakMode = NSLineBreakByTruncatingTail;

 

UITextField class:

1-2-1.

// Self. inputTF. clearButtonMode = UITextFieldViewModeWhileEditing appears only when editing;

 

UITextView class:

1-3-1), UITextView can only be centered on the X axis, the Y axis needs to be manually adjusted

-- Modified from the simplified book "IOS UITextView content vertical center Method" -- wood Lee

-(Void) contentSizeToFit {// first, judge whether there is any text (there is no need to set the center if ([msgTextView. text length]> 0) {// The contentSize attribute of textView CGSize contentSize = msgTextView. contentSize; // the margin attribute UIEdgeInsets offset of textView; // if the text height does not exceed the height of textView, if (contentSize. height <= msgTextView. height) {// The height of textView minus the text height divided by 2 is the offset in the Y direction, that is, the top margin CGFloat offsetY = (msgTextView. height-contentSize. height)/2; offset = UIEdgeInsetsMake (offsetY, 0, 0, 0);} // according to the preceding calculation, set the ContentSize and Y offset of textView [msgTextView setContentInset: offset] ;}}

 

UITextField and UITextView have the following classes:

1-4-1). A ToolBar with the "finish" button on the right is displayed on the keyboard.

UIToolbar * numberToolBar = [[UIToolbar alloc] initWithFrame: CGRectMake (0, 0, kSCREEN_WIDTH, 40)]; numberToolBar. items = [NSArray arrayWithObjects: [[UIBarButtonItem alloc] failed: Invalid target: nil action: nil], [[UIBarButtonItem alloc] initWithTitle: @ "finished" style: Finished target: self action: @ selector (doneWithNumberPad)], nil]; // numberToolBar. tintColor = [UIColor redColor]; self. inputTF. inputAccessoryView = numberToolBar;-(void) doneWithNumberPad {}

 

1-4-2), Protocol UITextInputTraits (automatic upper case, error correction, keyboard-related ):

①. AutocapitalizationType: automatically capitalized

② AutocorrectionType: Automatic Error Correction

③ SpellCheckingType: spelling check

④ KeyboardType: keyboard type

⑤ KeyboardAppearance: keyboard Color Style

6. returnKeyType: the return button "word": Send, next...

7. enablesReturnKeyAutomatically: when the text input length is 0, the return of the failed keyboard, but the text input length is greater than 0, enable the return of the keyboard

Secret, secureTextEntry: enter the password, enter a period of time, or enter the next font, it will become *

Delimiter and textContentType: Convert the address book content into a ToolBar button on the keyboard and enter it quickly. Third-party keyboards do not seem to be supported.