//
//  UIButton+WSLTitleImage.m
//  collectionView
//
//  Created by 王双龙 on 2017/11/6.
//  Copyright © 2017年 王双龙. All rights reserved.
//

#import "UIButton+WSLTitleImage.h"

@implementation UIButton (WSLTitleImage)

- (void)setButtonStyle:(WSLButtonStyle)buttonStyle spacing:(CGFloat)spacing {
    
    [self setTitle:self.currentTitle forState:UIControlStateNormal];
    [self setImage:self.currentImage forState:UIControlStateNormal];
    
    CGFloat imageWidth = self.imageView.image.size.width;
    CGFloat imageHeight = self.imageView.image.size.height;
//    CGFloat labelWidth = [self.titleLabel.text sizeWithFont:self.titleLabel.font].width;
//    CGFloat labelHeight = [self.titleLabel.text sizeWithFont:self.titleLabel.font].height;
    CGFloat labelWidth =  [self.titleLabel.text sizeWithAttributes:@{NSFontAttributeName:self.titleLabel.font}].width;
    CGFloat labelHeight =  [self.titleLabel.text sizeWithAttributes:@{NSFontAttributeName:self.titleLabel.font}].height;
    
    CGFloat imageOffsetX = (imageWidth + labelWidth) / 2 - imageWidth / 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 = (imageWidth + labelWidth / 2) - (imageWidth + 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
    
    CGFloat tempWidth = MAX(labelWidth, imageWidth);
    CGFloat changedWidth = labelWidth + imageWidth - tempWidth;
    CGFloat tempHeight = MAX(labelHeight, imageHeight);
    CGFloat changedHeight = labelHeight + imageHeight + spacing - tempHeight;
    
    switch (buttonStyle) {
        case WSLButtonStyleImageLeft:
            self.imageEdgeInsets = UIEdgeInsetsMake(0, -spacing/2, 0, spacing/2);
            self.titleEdgeInsets = UIEdgeInsetsMake(0, spacing/2, 0, -spacing/2);
            self.contentEdgeInsets = UIEdgeInsetsMake(0, spacing/2, 0, spacing/2);
            break;
            
        case WSLButtonStyleImageRight:
            self.imageEdgeInsets = UIEdgeInsetsMake(0, labelWidth + spacing/2, 0, -(labelWidth + spacing/2));
            self.titleEdgeInsets = UIEdgeInsetsMake(0, -(imageWidth + spacing/2), 0, imageWidth + spacing/2);
            self.contentEdgeInsets = UIEdgeInsetsMake(0, spacing/2, 0, spacing/2);
            break;
            
        case WSLButtonStyleImageTop:
            self.imageEdgeInsets = UIEdgeInsetsMake(-imageOffsetY, imageOffsetX, imageOffsetY, -imageOffsetX);
            self.titleEdgeInsets = UIEdgeInsetsMake(labelOffsetY, -labelOffsetX, -labelOffsetY, labelOffsetX);
            self.contentEdgeInsets = UIEdgeInsetsMake(imageOffsetY, -changedWidth/2, changedHeight-imageOffsetY, -changedWidth/2);
            break;
            
        case WSLButtonStyleImageBottom:
            self.imageEdgeInsets = UIEdgeInsetsMake(imageOffsetY, imageOffsetX, -imageOffsetY, -imageOffsetX);
            self.titleEdgeInsets = UIEdgeInsetsMake(-labelOffsetY, -labelOffsetX, labelOffsetY, labelOffsetX);
            self.contentEdgeInsets = UIEdgeInsetsMake(changedHeight-imageOffsetY, -changedWidth/2, imageOffsetY, -changedWidth/2);
            break;
            
        default:
            break;
    }
    
}
@end