Button--左文又图 上下图文 属性

button 文字图片上下/左右经常会用到,记录一下

上下:

    self.rechargeButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;//使图片和文字水平居中显示

    [self.rechargeButton setTitleEdgeInsets:UIEdgeInsetsMake(self.rechargeButton.imageView.frame.size.height+10 ,-self.rechargeButton.imageView.frame.size.width, 0.0,0.0)];//文字距离上边框的距离增加imageView的高度，距离左边框减少imageView的宽度，距离下边框和右边框距离不变

    [self.rechargeButton setImageEdgeInsets:UIEdgeInsetsMake(-10, 0.0,0.0, -self.rechargeButton.titleLabel.bounds.size.width)];//图片距离右边框距离减少图片的宽度，其它不边

 左右:(因为默认button  图片在左,文字在右, 下面代码是反过来的:   文字  图片)

    [self.DetailButton setTitleEdgeInsets:UIEdgeInsetsMake(0, -self.DetailButton.imageView.bounds.size.width, 0, self.DetailButton.imageView.bounds.size.width)];

    [self.DetailButton setImageEdgeInsets:UIEdgeInsetsMake(0, self.DetailButton.titleLabel.bounds.size.width, 0, -self.DetailButton.titleLabel.bounds.size.width)];

进UIButton看看，还有哪些属性。很快发现：

@property(nonatomic) UIControlContentHorizontalAlignment contentHorizontalAlignment; // how to position content hozontally inside control. default is centertypedef NS_ENUM(NSInteger, UIControlContentHorizontalAlignment) {    UIControlContentHorizontalAlignmentCenter = 0,    UIControlContentHorizontalAlignmentLeft   = 1,    UIControlContentHorizontalAlignmentRight  = 2,    UIControlContentHorizontalAlignmentFill   = 3,};

设置contentHorizontalAlignment

button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;