Button文字(titleLabel)与图片排列(imageView)及间距

使用Button自带的titleLabel和imageView,用来设置label和image的排列方式

titleEdgeInsets是titleLabel相对于其上下左右的inset,跟tableView的contentInset是类似的;

  • 如果只有title,那titleLabel的 上下左右 都是 相对于Button 的;
  • 如果只有image,那imageView的 上下左右 都是 相对于Button 的;
  • 如果同时有image和label,那image的 上下左 是 相对于Button 的,右 是 相对于label 的;label的 上下右 是 相对于Button的, 左 是 相对于label 的。

.h文件代码定义

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#import <UIKit/UIKit.h>
typedef NS_ENUM(NSUInteger, MKButtonEdgeInsetsStyle) {
MKButtonEdgeInsetsStyleTop, // image在上,label在下
MKButtonEdgeInsetsStyleLeft, // image在左,label在右
MKButtonEdgeInsetsStyleBottom, // image在下,label在上
MKButtonEdgeInsetsStyleRight // image在右,label在左
};
@interface UIButton (ImageTitleSpacing)
/**
* 设置button的titleLabel和imageView的布局样式,及间距
*
* @param style titleLabel和imageView的布局样式
* @param space titleLabel和imageView的间距
*/
- (void)layoutButtonWithEdgeInsetsStyle:(MKButtonEdgeInsetsStyle)style
imageTitleSpace:(CGFloat)space;

.m实现

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#import "UIButton+ImageTitleSpacing.h"
@implementation UIButton (ImageTitleSpacing)
- (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 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/2.0, 0, 0, -labelWidth);
labelEdgeInsets = UIEdgeInsetsMake(0, -imageWith, -imageHeight-space/2.0, 0);
}
break;
case MKButtonEdgeInsetsStyleLeft:
{
imageEdgeInsets = UIEdgeInsetsMake(0, -space/2.0, 0, space/2.0);
labelEdgeInsets = UIEdgeInsetsMake(0, space/2.0, 0, -space/2.0);
}
break;
case MKButtonEdgeInsetsStyleBottom:
{
imageEdgeInsets = UIEdgeInsetsMake(0, 0, -labelHeight-space/2.0, -labelWidth);
labelEdgeInsets = UIEdgeInsetsMake(-imageHeight-space/2.0, -imageWith, 0, 0);
}
break;
case MKButtonEdgeInsetsStyleRight:
{
imageEdgeInsets = UIEdgeInsetsMake(0, labelWidth+space/2.0, 0, -labelWidth-space/2.0);
labelEdgeInsets = UIEdgeInsetsMake(0, -imageWith-space/2.0, 0, imageWith+space/2.0);
}
break;
default:
break;
}
// 4. 赋值
self.titleEdgeInsets = labelEdgeInsets;
self.imageEdgeInsets = imageEdgeInsets;
}

Demo下载

参考