IOS development-UI (5) UITextField,-uiuitextfield

IOS development-UI (5) UITextField,-uiuitextfield

Use UITextField

 

1. Creation Method

Example:

UITextField * text = [[UITextField alloc] initWithFrame: CGRectMake (20, 20,130, 30)];

2. Common methods and attributes

1) Border Style

@ Property (nonatomic) UITextBorderStyle borderStyle;

UITextBorderStyleNone has no border and the background is transparent by default.

UITextBorderStyleLine. The background is transparent by default.

UITextBorderStyleBezel bezel border. The background is transparent by default.

UITextBorderStyleRoundedRect rounded border. The background is white by default.

TextField. borderStyle = UITextBorderStyleBezel;

 

2) Prompt text: placeholder

TextField. placeholder = @ "enter the bank card password ";

3) keyboard type: keyboardType

TextField. keyboardType = UIKeyboardTypeNumberPad;

4) keyboard style: keyboardAppearance

TextField. keyboardAppearance = UIKeyboardAppearanceLight;

5) ciphertext input: secureTextEntry

TextField. secureTextEntry = YES;

6) re-edit whether to clear: clearsOnBeginEditing

TextField. clearsOnBeginEditing = YES;

7) horizontal text alignment: textAlignment

TextField. textAlignment = NSTextAlignmentRight;

8) text scrolling: adjustsFontSizeToFitWidth

Used with minimumFontSize

 

 

// Reclaim the keyboard

[Self. view endEditing: YES];

 

9) return key type: returnKeyType

@ Property (nonatomic) UIReturnKeyType returnKeyType;

UIReturnKeyDefault,

UIReturnKeyGo,

UIReturnKeyGoogle,

UIReturnKeyJoin,

UIReturnKeyNext,

UIReturnKeyRoute,

UIReturnKeySearch,

UIReturnKeySend,

UIReturnKeyYahoo,

UIReturnKeyDone,

UIReturnKeyEmergencyCall,

 

 

10) Clear button mode: clearButtonMode

@ Property (nonatomic) UITextFieldViewMode clearButtonMode;

 

UITextFieldViewModeNever,

UITextFieldViewModeWhileEditing,

UITextFieldViewModeUnlessEditing,

UITextFieldViewModeAlways

 

3. UITextFieldDelegate Protocol

1) Can I enter the editing mode?

-(BOOL) textFieldShouldBeginEditing :( UITextField *) textField;

// NO is returned and cannot enter the editing status

Return YES;

2) the text box has entered the editing mode.

-(Void) textFieldDidBeginEditing :( UITextField *) textField;

 

3) Can the text box end the editing mode?

-(BOOL) textFieldShowEndEditing :( UITextField *) textField;

// NO is returned and the editing status cannot be ended.

Return YES;

 

4) The editing mode of the text box has ended.

-(Void) textFieldDidEndEditing :( UITextField *) textField;

 

5) Can I click the clear button?

-(BOOL) textFieldShouldClear :( UITextField *) textField;

// NO is returned. NO response is returned when you click the clear button.

Return YES;

 

6) Can I click the return button?

-(BOOL) textFieldShouldReturn :( UITextField *) textField;

 

// Remove the first responder

[TextField resignFirstResponder];

Return YES;

 

7) allow content modification

-(BOOL) textField :( UITextField *) textField shouldChangeCharactersInRange :( nsange) range replacementString :( NSString *) string; for example: if (textField. text. length >=6) {if ([string isEqualToString: @ ""]) {return YES;} return NO;} return YES ;}