UIButton

- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {

self.window= [[UIWindowalloc]initWithFrame:[[UIScreenmainScreen]bounds]];

// Override point for customization after application launch.

self.window.backgroundColor= [UIColorwhiteColor];

[self.windowmakeKeyAndVisible];

[_windowrelease];

//用button自己的便利构造器的方式来创建对象

UIButton*button = [UIButtonbuttonWithType:UIButtonTypeSystem];

//指定button的位置和大小

button.frame=CGRectMake(20,100,100,30);

button.backgroundColor= [UIColorgreenColor];

[self.windowaddSubview:button];

// button不用release

//    [button release];

//给button设置标题

[buttonsetTitle:@"确认"forState:UIControlStateNormal];

[buttonsetTitle:@"王俊太脏了"forState:UIControlStateHighlighted];

//标题的字体大小

button.titleLabel.font= [UIFontsystemFontOfSize:14];

//圆角

button.layer.cornerRadius=10;

button.layer.borderWidth=1;

//点击方法Button最重要的部分

[buttonaddTarget:selfaction:@selector(click:)forControlEvents:UIControlEventTouchUpInside];

returnYES;

}

- (void)click:(UIButton*)button{

NSLog(@"王俊太脏了");

}

//更换按钮的背景图

- (void)changePic:(UIButton*)button{

//判断

if(self.isSelected) {

[buttonsetBackgroundImage:[UIImageimageNamed:@"check.png"]forState:UIControlStateNormal];

}else{

[buttonsetBackgroundImage:[UIImageimageNamed:@"checked.png"]forState:UIControlStateNormal];

}

//把当前的状态也进行调整

self.isSelected= !self.isSelected;

-(void)click:(UIButton*)button{

//按钮的点击方法会全过来一个相应类型的button,谁触发了这个点击方法,相应的button就是那个对象

UIButton*but =(UIButton*) [self.windowviewWithTag:1000];

//判断当前按钮的标题

// currentTitle获取当前按钮的标题

NSLog(@"%@",but.currentTitle);

if([but.currentTitleisEqualToString:@"确认"]) {

[butsetTitle:@"取消"forState:UIControlStateNormal];

}else{

[butsetTitle:@"确认"forState:UIControlStateNormal];

}

NSLog(@"%ld",button.tag);

if([button.currentTitleisEqualToString:@"确认"]) {

[buttonsetTitle:@"取消"forState:UIControlStateNormal];

}else{

[buttonsetTitle:@"确认"forState:UIControlStateNormal];

}

};

[button1setImage:[UIImageimageNamed:@"BtnOff"]forState:UIControlStateNormal];

//如果想使用setImage设置图片的话,button的类型要调整成custom,setImage方法不会把图片放大成按钮大小

//给button设置背景图片

[buttonsetBackgroundImage:[UIImageimageNamed:@"checked.png"]forState:UIControlStateNormal];

self.isSelected=YES;