2.状态：UIControlStateNormal=0 常规状态显现
UIControlStateHighlighted=1<<0高亮状态显现
*/
UIButton *button=[UIButton buttonWithType:UIButtonTypeCustom];
button.frame=CGRectMake(170, 200, 70, 70);
//button.backgroundColor=[UIColor blackColor];
//设置常规标题
[button setTitle:@"登录" forState:UIControlStateNormal];
[button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
//设置button上的字体大小
button.titleLabel.font=[UIFont systemFontOfSize:18];
//设置高亮标题
// [button setTitle:@"高亮" forState:UIControlStateHighlighted];
// [button setTitleColor:[UIColor greenColor] forState:UIControlStateHighlighted];
//按钮是否禁用
// button.enabled=NO;
// [button setTitle:@"禁用" forState:UIControlStateDisabled];
// [button setTitleColor:[UIColor grayColor] forState:UIControlStateDisabled];
//判断按钮是否选中
// button.selected=YES;
[button setTitle:@"被选中" forState:UIControlStateSelected];
[button setTitleColor:[UIColor blueColor] forState:UIControlStateSelected];
//设置圆角
button.layer.cornerRadius=50;
button.layer.masksToBounds=YES;
//设置背景图片
//UIImage *image=[UIImage imageNamed:@"Icon-80.png"];
//[button setBackgroundImage:image forState:UIControlStateNormal];
UIImage *image1=[UIImage imageNamed:@"649417.jpg"];
[button setBackgroundImage:image1 forState:UIControlStateSelected];
// [button setImage:image forState:UIControlStateNormal];
//[button setImage:image1 forState:UIControlStateHighlighted];
//一点就会高亮
// button.showsTouchWhenHighlighted=YES;
//@selector(selector)方法选择器
//监听
[button addTarget:self action:@selector(text:) forControlEvents:UIControlEventTouchUpInside];
[button addTarget:self action:@selector(text1:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
UIView *view=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 50, 50)];
view.backgroundColor=[UIColor yellowColor];
view.tag=110;
[self.view addSubview:view];
}
-(void)text1:(UIButton *)button{
if (button.selected==NO) {
button.selected=YES;
}else{
button.selected=NO;
}
}
-(void)text:(UIButton *)sender{
UIView *view=[self.view viewWithTag:110];
view.backgroundColor=[UIColor colorWithRed:(arc4random()%(256-0+1)+0)/256.0 green:(arc4random()%(256-0+1)+0)/256.0 blue:(arc4random()%(256-0+1)+0)/256.0 alpha:1];
view.frame=CGRectMake(arc4random()%(414-50-0+1)+0, arc4random()%(736-0+1)+0-50, arc4random()%(414-0+1)+0-50,50);
UIButton属性
1.UIButton状态:
UIControlStateNormal // 正常状态
UIControlStateHighlighted // 高亮状态
UIControlStateDisabled // 禁用状态
UIControlStateSelected // 选中状态
UIControlStateApplication //
UIControlStateReserved // 保留状态
2.Uibutton类型：
UIButtonTypeCustom //自定义类型
添加图片： 灰色背景颜色：
UIButtonTypeRoundedRect //圆角类型
UIButtonTypeDetailDisclosure //细节展示按钮
UIButtonTypeInfoLight //浅色背景的信息按钮
UIButtonTypeInfoDark //暗色背景的信息按钮
UIButtonTypeContactAdd // 添加按钮
3.UIButton常用属性
给按钮设置文字时，苹果文档说明，不能使用label对象设置文字的颜色或者阴影颜色，相反必须使用setTitleColor:forState: and setTitleShadowColor:forState:这两个方法才能修改这些值。
设置按钮中其他属性依次类推。。。。
//设置对应状态的标题内容default is nil. title is assumed to be single line
- (void)setTitle:(NSString *)title forState:(UIControlState)state;
//设置对应状态的标题颜色
- (void)setTitleColor:(UIColor *)color forState:(UIControlState)state;
//设置对应状态的标题阴影颜色
- (void)setTitleShadowColor:(UIColor *)color forState:(UIControlState)state;
//设置对应状态的按钮的图片
- (void)setImage:(UIImage *)image forState:(UIControlState)state;
//设置对应状态的按钮背景图片
- (void)setBackgroundImage:(UIImage *)image forState:(UIControlState)state;
添加事件
- (void)addTarget:(id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents;
这些事件都是基于触摸、基于值、基于编辑。有如下事件会触发。
在点击按钮是按钮是凹下去，然后弹起才触发起事件，按钮的状态有：
- UIControlEventTouchDown // 按下
- UIControlEventTouchDownRepeat 多次按下
- UIControlEventTouchUpInside // 在按钮及其一定外围内松开
- UIControlEventTouchUpOutside // 按钮外面松开
4.adjustsImageWhenDisabled
当按钮禁用的情况下，图像的颜色会被画深一点，默认为YES。
5.adjustsImageWhenHighlighted
当按钮高亮的情况下，图像的颜色会被画深一点，默认为YES。
6.showsTouchWhenHighlighted
button.showsTouchWhenHighlighted=YES;点击时的闪光效果会被前景图片遮住中间部分；
6.contentEdgeInsets
设置按钮的内部内容（包含按钮图片和标题）离按钮边缘上下左右的距离。
7.按钮实例
1.有些时候我们想让UIButton的title居左对齐，我们设置
btn.textLabel.textAlignment = UITextAlignmentLeft
是没有作用的，我们需要设置
btn.contentHorizontalAlignment = UIControlContentHorizonAlignmentLeft;
但是问题又出来，此时文字会紧贴到左边框，我们可以设置
btn.contentEdgeInsets = UIEdgeInsetsMake(0,10, 0, 0);
使文字距离左边框保持10个像素的距离。