iOS development-Basic use of code

//

VIEWCONTROLLER.M

05- Creating a button with code

//

Created by Vic fan on 2017/7/30.

Copyright Li Hongqiang year . All rights reserved.

//

#import "ViewController.h"

@interface viewcontroller ()

@end

@implementation Viewcontroller

called after the view has been loaded, typically used to initialize ( add) the control, which is the system's active invocation of the

//

-(void) viewdidload {

[Super Viewdidload];

//1. Create a Button object

UIButton *headbtn = [[UIButton alloc]init];

//2. Set the frame of the button

Headbtn. Frame = CGRectMake (+, +, + );

//3. add to view

[self. View addsubview: headbtn];

//4. set up a picture

//4.1 Setting a picture of a normal state

UIImage *nomalimage = [UIImage imagenamed:@ "btn_01"];

[Headbtn setbackgroundimage: Nomalimage forstate:uicontrolstatenormal];

UIImage *hightimage = [UIImage imagenamed:@ "btn_02"];

[Headbtn setbackgroundimage: Hightimage forstate:uicontrolstatehighlighted];

//5. Set Text

//5.1 setting text in normal state

[Headbtn settitle:@ " touch Me " forstate:uicontrolstatenormal];

// set text in highlighted state

[Headbtn settitle:@ " touch me what to do " forstate:uicontrolstatehighlighted];

//6. Set text color

[Headbtn settitlecolor: [uicolor redcolor] forstate:uicontrolstatenormal ];

// Set Highlight status text color

[Headbtn settitlecolor: [uicolor bluecolor] forstate: Uicontrolstatehighlighted];

//7 Click events to add a button

What's the forcontrolevents listening to?

[Headbtn addTarget:self action:@selector(benclicked) forcontrolevents: UIControlEventTouchUpInside];

}

-(void) benclicked{

NSLog(@ " we're almost out of class ");

}

-(void) didreceivememorywarning {

[Super didreceivememorywarning];

//Dispose of any resources, can be recreated.

}

@end

iOS development-Basic use of code