网上试了下各种方法 感觉都不对，这个是最靠谱的
总结模式：
- 图片在左，title在右
- 图片在上，title在下 ：MKButtonEdgeInsetsStyleTop
- 图片在右，title在左
- 图片在下，title在上
- (void)layoutButtonWithEdgeInsetsStyle:(MKButtonEdgeInsetsStyle)style
imageTitleSpace:(CGFloat)space {
// 1. 得到imageView和titleLabel的宽、高
// CGFloat imageWith = self.imageView.frame.size.width;
// CGFloat imageHeight = self.imageView.frame.size.height;
CGFloat imageWith = self.currentImage.size.width;
CGFloat imageHeight = self.currentImage.size.height;
CGFloat labelWidth = 0.0;
CGFloat labelHeight = 0.0;
if ([UIDevice currentDevice].systemVersion.floatValue >= 8.0) {
// 由于iOS8中titleLabel的size为0，用下面的这种设置
labelWidth = self.titleLabel.intrinsicContentSize.width;
labelHeight = self.titleLabel.intrinsicContentSize.height;
} else {
labelWidth = self.titleLabel.frame.size.width;
labelHeight = self.titleLabel.frame.size.height;
}
// 2. 声明全局的imageEdgeInsets和labelEdgeInsets
UIEdgeInsets imageEdgeInsets = UIEdgeInsetsZero;
UIEdgeInsets labelEdgeInsets = UIEdgeInsetsZero;
// 3. 根据style和space得到imageEdgeInsets和labelEdgeInsets的值
switch (style) {
case MKButtonEdgeInsetsStyleTop: {
imageEdgeInsets = UIEdgeInsetsMake(-labelHeight-space, 0, 0, -labelWidth);
labelEdgeInsets = UIEdgeInsetsMake(0, -imageWith, -imageHeight-space, 0);
}
break;
case MKButtonEdgeInsetsStyleLeft: {
imageEdgeInsets = UIEdgeInsetsMake(0, -space, 0, space);
labelEdgeInsets = UIEdgeInsetsMake(0, space, 0, -space);
}
break;
case MKButtonEdgeInsetsStyleBottom: {
imageEdgeInsets = UIEdgeInsetsMake(0, 0, -labelHeight-space, -labelWidth);
labelEdgeInsets = UIEdgeInsetsMake(-imageHeight-space, -imageWith, 0, 0);
}
break;
case MKButtonEdgeInsetsStyleRight: {
imageEdgeInsets = UIEdgeInsetsMake(0, labelWidth+space, 0, -labelWidth-space);
labelEdgeInsets = UIEdgeInsetsMake(0, -imageWith-space, 0, imageWith+space);
}
break;
default:
break;
}
// 4. 赋值
self.titleEdgeInsets = labelEdgeInsets;
self.imageEdgeInsets = imageEdgeInsets;
}
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