UIButtont特殊样式

UIButton *button = [UIButtonbuttonWithType:UIButtonTypeSystem];
    button.frame =CGRectMake(100, 100, 100, 30);
    //设置显示文本
    //因为按钮有多种状态(Normal,Highlighted,UIControlStateDisabled),需要给不同状态设置文本
    //UIControlState
表示控件状态
    [button setTitle:@"我是按钮,点我啊"forState:UIControlStateNormal];
    [self.viewaddSubview:button];
    
    //按钮添加点击事件处理
    //参数1:传入一个对象执行,
表示那个对象处理事件,一般传入self
    //参数2:传入方法的selector,
表示那个方法处理事件
    //参数3:传入事件类型,
最常用TouchUpInside,参数类型UIControlEvent
    //按下触发事件: UIControlEventTouchDown
    [button addTarget:selfaction:@selector(buttonClicked:)forControlEvents:UIControlEventTouchUpInside];
    
    //2.常用属性
    //设置文本颜色
    [button setTitleColor:[UIColorredColor]
forState:UIControlStateNormal];
    
    //设置文本字体
    button.titleLabel.font = [UIFontsystemFontOfSize:12];
    
    //设置圆角矩形按钮
    button.backgroundColor = [UIColorwhiteColor];
    //设置圆角大小
    button.layer.cornerRadius = 10;
    //设置剪切(否则有的时候设置圆角没效果)
    button.clipsToBounds =YES;
    
    //点击位置高亮效果
    button.showsTouchWhenHighlighted =YES;
    
    //禁止点击
    button.enabled =NO;
    
    self.view.backgroundColor = [UIColorlightGrayColor];
    
    //3.图片按钮的使用
    UIButton *imageButton = [UIButtonbuttonWithType:UIButtonTypeCustom];
    imageButton.frame =CGRectMake(100, 200, 150, 30);
    //设置背景图片
    UIImage *image = [UIImageimageNamed:@"back.png"];
    [imageButton setBackgroundImage:imageforState:UIControlStateNormal];
    [self.viewaddSubview:imageButton];
    //设置前景(文本和图片)
    [imageButton setTitle:@"图片安妮"forState:UIControlStateNormal];
    [imageButton setTitleColor:[UIColorblueColor]
forState:UIControlStateNormal];
    [imageButton setImage:[UIImageimageNamed:@"city_select.png"]forState:UIControlStateNormal];
    [imageButton addTarget:selfaction:@selector(imageBtnClick)forControlEvents:UIControlEventTouchUpInside];
    
    //调整按钮中文本和图片位置
    // top, left, bottom, right
    imageButton.titleEdgeInsets =UIEdgeInsetsMake(0, -100, 0, 0);
    imageButton.imageEdgeInsets =UIEdgeInsetsMake(0, 80, 0, 0);
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