YYXC_Student/jiaPei/Utils/Category/UIButton/UIButton+RQExtension.m

//
//  UIButton+RQExtension.m
//  XinShouJiaDao
//
//  Created by 张嵘 on 2021/7/7.
//  Copyright © 2021 JCZ. All rights reserved.
//

#import "UIButton+RQExtension.h"
#import <objc/runtime.h>

static const void *UIButtonBlockKey = &UIButtonBlockKey;
@implementation UIButton (RQExtension)
- (void)setFixWidthScreenFont:(float)fixWidthScreenFont {
    if (fixWidthScreenFont > 0 ) {
        self.titleLabel.font = [UIFont systemFontOfSize:RQ_WIDTH(fixWidthScreenFont)];
    } else {
        self.titleLabel.font = self.titleLabel.font;
    }
}

- (float)fixWidthScreenFont {
    return self.fixWidthScreenFont;
}

- (void)addActionHandler:(TouchedBlock)touchHandler {
    objc_setAssociatedObject(self, UIButtonBlockKey, touchHandler, OBJC_ASSOCIATION_COPY_NONATOMIC);
    [self addTarget:self action:@selector(actionTouched:) forControlEvents:UIControlEventTouchUpInside];
}

- (void)actionTouched:(UIButton *)btn {
    TouchedBlock block = objc_getAssociatedObject(self, UIButtonBlockKey);
    if (block) {
        block(btn.tag);
    }
}


- (void) setImage:(UIImage *)image withTitle:(NSString *)title forState:(UIControlState)stateType {
    [self setImage:image withTitle:title Font:10 forState:stateType];
}

- (void) setImage:(UIImage *)image withTitle:(NSString *)title Font:(CGFloat)font forState:(UIControlState)stateType{
    [self.titleLabel setContentMode:UIViewContentModeCenter];
    [self.titleLabel setBackgroundColor:[UIColor clearColor]];
    [self setTitleColor:RQ_MAIN_TEXT_COLOR_1 forState:stateType];
//    [self setTitleColor:kTitleColor forState:stateType];
    [self setTitle:title forState:stateType];
    [self.titleLabel setFont:RQRegularFont(font)];
    
    [self setImage:image forState:stateType];
    [self.imageView setContentMode:UIViewContentModeScaleAspectFit];
}


- (void)setTitle:(NSString*)title textColor:(UIColor*)color Font:(CGFloat)font fotState:(UIControlState)stateType {
    [self setTitle:title forState:stateType];
    [self setTitleColor:color forState:stateType];
    [self.titleLabel setFont:RQRegularFont(font)];
}

- (void)setImage:(UIImage *)image withTitle:(NSString*)title textColor:(UIColor*)color Font:(CGFloat)font fotState:(UIControlState)stateType {
    [self.titleLabel setContentMode:UIViewContentModeCenter];
    [self.titleLabel setBackgroundColor:[UIColor clearColor]];
    [self setTitleColor:color forState:stateType];
    [self setTitle:title forState:stateType];
    [self.titleLabel setFont:RQRegularFont(font)];
    [self setImage:image forState:stateType];
    [self.imageView setContentMode:UIViewContentModeScaleAspectFit];
}


-(void)setTitleNormal:(NSString*)title
{
    [self setTitle:title forState:UIControlStateNormal];
}
-(void)setTitleSelect:(NSString*)title
{
    [self setTitle:title forState:UIControlStateSelected];
}


-(void)target:(id)obj
{
    [self addTarget:obj action:NSSelectorFromString(@"btnClick:") forControlEvents:UIControlEventTouchUpInside];
}

-(void)target:(id)obj tag:(NSInteger)tag
{
    self.tag = tag;
    [self target:obj];
}

- (void)layoutButtonWithEdgeInsetsStyle:(RQButtonEdgeInsetsStyle)style
                        imageTitleSpace:(CGFloat)space {
    /**
     *  知识点：titleEdgeInsets是title相对于其上下左右的inset，跟tableView的contentInset是类似的，
     *  如果只有title，那它上下左右都是相对于button的，image也是一样；
     *  如果同时有image和label，那这时候image的上左下是相对于button，右边是相对于label的；title的上右下是相对于button，左边是相对于image的。
     */
    
    // 1. 得到imageView和titleLabel的宽、高
    CGFloat imageWith = self.imageView.image.size.width;
    CGFloat imageHeight = self.imageView.image.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 RQButtonEdgeInsetsStyleTop:
        {
            imageEdgeInsets = UIEdgeInsetsMake(-labelHeight-space/2.0, 0, 0, -labelWidth);
            labelEdgeInsets = UIEdgeInsetsMake(0, -imageWith, -imageHeight-space/2.0, 0);
        }
            break;
        case RQButtonEdgeInsetsStyleLeft:
        {
            imageEdgeInsets = UIEdgeInsetsMake(0, -space/2.0, 0, space/2.0);
            labelEdgeInsets = UIEdgeInsetsMake(0, space/2.0, 0, -space/2.0);
        }
            break;
        case RQButtonEdgeInsetsStyleBottom:
        {
            imageEdgeInsets = UIEdgeInsetsMake(0, 0, -labelHeight-space/2.0, -labelWidth);
            labelEdgeInsets = UIEdgeInsetsMake(-imageHeight-space/2.0, -imageWith, 0, 0);
        }
            break;
        case RQButtonEdgeInsetsStyleRight:
        {
            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;
}

@end