增加一些扩展类

MobileProject/Expand/Category/UIKit/UIButton/UIButton+JKImagePosition.h

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+//
+//  UIButton+JKImagePosition.h
+//  Demo_ButtonImageTitleEdgeInsets
+//
+//  Created by luxiaoming on 16/1/15.
+//  Copyright © 2016年 luxiaoming. All rights reserved.
+//
+//https://github.com/Phelthas/Demo_ButtonImageTitleEdgeInsets
+// 用button的titleEdgeInsets和 imageEdgeInsets属性来实现button文字图片上下或者左右排列的
+#import <UIKit/UIKit.h>
+
+typedef NS_ENUM(NSInteger, JKImagePosition) {
+    LXMImagePositionLeft = 0,              //图片在左，文字在右，默认
+    LXMImagePositionRight = 1,             //图片在右，文字在左
+    LXMImagePositionTop = 2,               //图片在上，文字在下
+    LXMImagePositionBottom = 3,            //图片在下，文字在上
+};
+
+@interface UIButton (JKImagePosition)
+
+/**
+ *  利用UIButton的titleEdgeInsets和imageEdgeInsets来实现文字和图片的自由排列
+ *  注意：这个方法需要在设置图片和文字之后才可以调用，且button的大小要大于 图片大小+文字大小+spacing
+ *
+ *  @param spacing 图片和文字的间隔
+ */
+- (void)jk_setImagePosition:(JKImagePosition)postion spacing:(CGFloat)spacing;
+
+@end

MobileProject/Expand/Category/UIKit/UIButton/UIButton+JKImagePosition.m

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+//
+//  UIButton+JKImagePosition.m
+//  Demo_ButtonImageTitleEdgeInsets
+//
+//  Created by luxiaoming on 16/1/15.
+//  Copyright © 2016年 luxiaoming. All rights reserved.
+//
+
+#import "UIButton+JKImagePosition.h"
+
+@implementation UIButton (JKImagePosition)
+
+- (void)jk_setImagePosition:(JKImagePosition)postion spacing:(CGFloat)spacing {
+    CGFloat imageWith = self.imageView.image.size.width;
+    CGFloat imageHeight = self.imageView.image.size.height;
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+    CGFloat labelWidth = [self.titleLabel.text sizeWithFont:self.titleLabel.font].width;
+    CGFloat labelHeight = [self.titleLabel.text sizeWithFont:self.titleLabel.font].height;
+#pragma clang diagnostic pop
+
+    CGFloat imageOffsetX = (imageWith + labelWidth) / 2 - imageWith / 2;//image中心移动的x距离
+    CGFloat imageOffsetY = imageHeight / 2 + spacing / 2;//image中心移动的y距离
+    CGFloat labelOffsetX = (imageWith + labelWidth / 2) - (imageWith + labelWidth) / 2;//label中心移动的x距离
+    CGFloat labelOffsetY = labelHeight / 2 + spacing / 2;//label中心移动的y距离
+
+    switch (postion) {
+        case LXMImagePositionLeft:
+            self.imageEdgeInsets = UIEdgeInsetsMake(0, -spacing/2, 0, spacing/2);
+            self.titleEdgeInsets = UIEdgeInsetsMake(0, spacing/2, 0, -spacing/2);
+            break;
+
+        case LXMImagePositionRight:
+            self.imageEdgeInsets = UIEdgeInsetsMake(0, labelWidth + spacing/2, 0, -(labelWidth + spacing/2));
+            self.titleEdgeInsets = UIEdgeInsetsMake(0, -(imageHeight + spacing/2), 0, imageHeight + spacing/2);
+            break;
+
+        case LXMImagePositionTop:
+            self.imageEdgeInsets = UIEdgeInsetsMake(-imageOffsetY, imageOffsetX, imageOffsetY, -imageOffsetX);
+            self.titleEdgeInsets = UIEdgeInsetsMake(labelOffsetY, -labelOffsetX, -labelOffsetY, labelOffsetX);
+            break;
+
+        case LXMImagePositionBottom:
+            self.imageEdgeInsets = UIEdgeInsetsMake(imageOffsetY, imageOffsetX, -imageOffsetY, -imageOffsetX);
+            self.titleEdgeInsets = UIEdgeInsetsMake(-labelOffsetY, -labelOffsetX, labelOffsetY, labelOffsetX);
+            break;
+
+        default:
+            break;
+    }
+
+}
+
+@end