iOS Button内的图片和文字的自由排列

转自：https://github.com/Phelthas/Demo_ButtonImageTitleEdgeInsets

#import <UIKit/UIKit.h>

typedef NS_ENUM(NSInteger, LXMImagePosition) {
    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 (LXMImagePosition)

/**
 *  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)setImagePosition:(LXMImagePosition)postion spacing:(CGFloat)spacing;

@end

@implementation UIButton (LXMImagePosition)

- (void)setImagePosition:(LXMImagePosition)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
    
    // gzd 修改 16.9.28
    CGSize  labelSize   = CGSizeZero;
    CGFloat labelWidth  = 0;
    CGFloat labelHeight = 0;
    if ([self.titleLabel.text respondsToSelector:@selector(boundingRectWithSize:options:attributes:context:)]) {
        labelSize = [self.titleLabel.text boundingRectWithSize:self.bounds.size options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName:self.titleLabel.font} context:nil].size;
    }else {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
        labelSize = [self.titleLabel.text sizeWithFont:self.titleLabel.font];
#pragma clang diagnostic pop
    }
    labelWidth = labelSize.width;
    labelHeight = labelSize.height;
    //----------------
    
    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