Demo地址
Demo中包含本人學(xué)習(xí)的所有資料，還有一些封裝的Pod組件，歡迎下載Star，如果有錯(cuò)誤的地方，還請(qǐng)指出，詳情查看 README.md

開發(fā)了這么多年，每次遇到調(diào)整 Button 的圖片和文字位置的問題，都要去搜索，然后各種嘗試，解決方案雖然有，但是沒有一篇文章給我說明白是怎么回事的。

這種事情還是需要自己來啊，終于解了多年的疑惑，居然如此簡(jiǎn)單

以下僅針對(duì)
button 的 setTitleEdgeInsets 和 setImageEdgeInsets 方法

效果圖

圖一

原理

/**
 * UIEdgeInsetsMake(上, 左, 下, 右)
 * 偏移參照物為自己，初始偏移量是0
 * 偏移量計(jì)算公式：
 * offsetX = (左-右)/2 ,為正 則向右偏移，為負(fù)則向左偏移
 * offsetY = (上-下)/2 ,為正 則向下偏移，為負(fù)則向上偏移
 *
 * 最終偏移量是根據(jù)最終算出來的數(shù)值決定 (offsetX,offsetY)
 */

就是這么簡(jiǎn)單
如果我們要將文字向右偏移 5個(gè)點(diǎn)，以下四種結(jié)果相同，
即 (左-右) / 2 = offsetX = 5

// 第一種
[btn setTitleEdgeInsets:UIEdgeInsetsMake(0, 10, 0，0)];

// 第二種
[btn setTitleEdgeInsets:UIEdgeInsetsMake(0, 0, 0，-10)];

// 第三種
[btn setTitleEdgeInsets:UIEdgeInsetsMake(0, -15, 0，-25)];

// 第四種
[btn setTitleEdgeInsets:UIEdgeInsetsMake(0, 5, 0，-5)];

源碼中：Demo實(shí)例 ，效果圖為 圖一

-(void)setUpSubViews{
    
    UIButton *btn = [[UIButton alloc]init];
    btn.backgroundColor = [UIColor lightGrayColor];
    [btn setTitle:@"居左button" forState:UIControlStateNormal];
    [self.view addSubview:btn];
    
    [btn mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.offset(100);
        make.right.offset(-100);
        make.top.offset(STATUSNAVIBAR_HEIGHT + 100);
        make.height.mas_equalTo(80);
    }];
    
    
    UIButton *btn1 = [[UIButton alloc]init];
    btn1.backgroundColor = [UIColor lightGrayColor];
    [btn1 setTitle:@"居右button" forState:UIControlStateNormal];
    [self.view addSubview:btn1];
    
    [btn1 mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.offset(100);
        make.right.offset(-100);
        make.top.equalTo(btn.mas_bottom).offset(50);
        make.height.mas_equalTo(80);
    }];
    
    
    UIButton *btn2 = [[UIButton alloc]init];
    btn2.backgroundColor = [UIColor lightGrayColor];
    [btn2 setTitle:@"左上button" forState:UIControlStateNormal];
    [self.view addSubview:btn2];
    
    [btn2 mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.offset(100);
        make.right.offset(-100);
        make.top.equalTo(btn1.mas_bottom).offset(50);
        make.height.mas_equalTo(80);
    }];
    
    
    UIButton *btn3 = [[UIButton alloc]init];
    btn3.backgroundColor = [UIColor lightGrayColor];
    [btn3 setTitle:@"右下button" forState:UIControlStateNormal];
    [self.view addSubview:btn3];
    
    [btn3 mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.offset(100);
        make.right.offset(-100);
        make.top.equalTo(btn2.mas_bottom).offset(50);
        make.height.mas_equalTo(80);
    }];
    
    
    UIButton *btn4 = [[UIButton alloc]init];
    btn4.backgroundColor = [UIColor lightGrayColor];
    [btn4 setTitle:@"帶圖IMAGE" forState:UIControlStateNormal];
    [btn4 setImage:[UIImage imageNamed:@"time"] forState:UIControlStateNormal];
    [self.view addSubview:btn4];
    
    [btn4 mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.offset(100);
        make.right.offset(-100);
        make.top.equalTo(btn3.mas_bottom).offset(50);
        make.height.mas_equalTo(80);
    }];
    

    ///===================================///
    ///============開始測(cè)試偏移量===========///
    ///===================================///
    [self.view layoutIfNeeded];
    [self.view setNeedsLayout];
    
    //圖片文字寬度
    CGFloat textW = btn.titleLabel.intrinsicContentSize.width;
    CGFloat btnW = btn.width;
    CGFloat offsetX = (btnW - textW)/2;
    
    //圖片文字高度
    CGFloat textH = btn.titleLabel.intrinsicContentSize.height;
    CGFloat btnH = btn.height;
    CGFloat offsetY = (btnH - textH)/2;
    
    
    /// 偏移量計(jì)算：(0-offsetX * 2)/2 = -offsetX
    [btn setTitleEdgeInsets:UIEdgeInsetsMake(0, 0, 0, offsetX * 2)];
    
    ///常規(guī)對(duì)稱寫法：數(shù)值相同，一正一負(fù)
//    /// 偏移量計(jì)算：(offsetX- (-offsetX))/2 = offsetX
//    [btn1 setTitleEdgeInsets:UIEdgeInsetsMake(0, offsetX, 0, -offsetX)];
    
    /// 非對(duì)稱數(shù)值測(cè)試
    /// 偏移量計(jì)算：((offsetX+20) - (-offsetX + 20))/2 = offsetX
    [btn1 setTitleEdgeInsets:UIEdgeInsetsMake(10, -1000, 2, -1000-offsetX*2)];
    
    [btn2 setTitleEdgeInsets:UIEdgeInsetsMake(0, 0, offsetY * 2, offsetX * 2)];
    [btn3 setTitleEdgeInsets:UIEdgeInsetsMake(offsetY, offsetX, -offsetY, -offsetX)];
    
    CGFloat imgW = btn4.imageView.intrinsicContentSize.width;
    CGFloat textW1 = btn4.titleLabel.intrinsicContentSize.width;
    
    /// 圖文：設(shè)置文字圖片調(diào)換位置，且圖片文字間隔 10 個(gè)點(diǎn)
    [btn4 setTitleEdgeInsets:UIEdgeInsetsMake(0, -(imgW + 5)*2, 0, 0)];
    [btn4 setImageEdgeInsets:UIEdgeInsetsMake(0, 0, 0,  -(textW1 + 5)*2)];
}