iOS UIButton文字左图片右

    // 给自定义的button添加这个属性
    self.myButton.semanticContentAttribute = UISemanticContentAttributeForceRightToLeft
    // 设置文字和图片的间距
    CGFloat margin = 5;
    self.myButton.imageEdgeInsets = UIEdgeInsetsMake(0, margin, 0, -margin);