IOS development-UIButton (button) of the UIKit control and uikituibutton

IOS development-UIButton (button) of the UIKit control and uikituibutton

(Note: This article describes some of the method attributes used in my daily development as a memo)

Like UIView, UIButton is the most commonly used and common UIKit control in iOS development.

UIButton inherits from UIControl, while UIControl inherits from UIView. Therefore, UIButton is also a subclass of UIView.

In any iOS app, UIButton is everywhere and can interact with users and pass events!

Create UIButton

1 // instantiate (create) button 2/** 3 * Type value: 4*1. UIButtonTypeContactAdd: + button 5*2. UIButtonTypeCustom: Custom button 6*3. UIButtonTypeDetailDisclosure: 'I' button 7*4. UIButtonTypeInfoDark: 'I' button 8*5. UIButtonTypeInfoLight: 'I' button 9*6. UIButtonTypeRoundedRect: the rounded corner button (this final effect is not set now) 10*7. UIButtonTypeSystem: the effect is the same as the above RoundedRect 11 */12 UIButton * button = [UIButton buttonWithType: UIButtonTypeSystem]; 13 // set the background color 14 button. backgroundColor = [UIColor lightGrayColor]; 15 // set the region range to 16 buttons. frame = CGRectMake (110,234,100,100); 17 // Add to View 18 [self. view addSubview: button];

Attribute

 

1 // set whether to select status 2 button. selected = NO; 3 // set whether to receive the touch event 4 button. enabled = YES; 5 // set the tag value to 6 buttons. tag = 0; 7 // set the font size of the button title text to 8 buttons. titleLabel. font = [UIFont systemFontOfSize: 18366f]; 9 // by setting this attribute, you can adjust the text of the button to display 10 // NSLineBreakByCharWrapping in the area of the button, same effect 11 button. lineBreakMode = NSLineBreakByWordWrapping; 12 // set the rounded corner diameter 13 button. layer. cornerRadius = 10.0f; 14 // cut the part exceeding 15 buttons. layer. masksToBounds = YES; 16 // Border Width 17 button. layer. borderWidth = 1.0f; 18 // border color 19 button. layer. borderColor = [UIColor purpleColor]. CGColor;

 

Method

1 // set the button status title text 2/** 3 * State value: 4*1. UIControlStateNormal: normal state (default state) 5*2. UIControlStateSelected: The selected status is 6*3. UIControlStateHighlighted: highlighted 7*4. UIControlStateDisabled: disabled status 8 * the four 9 */10 [button setTitle: @ "button" forState: UIControlStateNormal] are usually used by developers. 11 // set the button status icon 12 // here the value of state is the same as above 13 [button setImage: [UIImage imageNamed: @ "01.png"] forState: UIControlStateNormal]; 14 // set the button status background image 15 // The value of state here is the same as that above 16 [button setBackgroundImage: [UIImage imageNamed: @ "02.png"] forState: UIControlStateNormal]; 17 // Add (BIND) Click Event 18/** 19 * parameter description: 20 * target: event listening object. Generally, self21 * action: callback event method, only one parameter 22 * ControlEvents can be uploaded for the button itself: Listener type 23 * UIControlEventTouchUpInside: Click 24 * UIControlEventTouchCancel: Touch to cancel 25 * UIControlEventTouchDown: Touch to finish 26 * so far, most of the tasks I use are click events, which are rarely used to cancel and complete 27 */28 [button addTarget: self action: @ selector (ButtonTouchEvent :) forControlEvents: UIControlEventTouchUpInside];

Event

-(Void) ButtonTouchEvent :( UIButton *) sender {// click the Event Callback processing button to select the sender. selected =! Sender. selected ;}