iOS中 按钮和标题完美各种排列／完美教程 韩俊强的博客

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前言：最近常常用到按钮和相应标题的组合，当按钮设置图片加标题时，触发范围较小，不易触发，最重要的是还要调试偏移量，相信研究过的开发者都很头疼这一点，那我我就想解决，于是在网上研究了一番，个人总结封装了一个，觉得很棒，推荐给大家！

下面看教程：

整体是对UIButton的自定义封装：

//UIButton+UIButtonSetEdgeInsets.h#import <UIKit/UIKit.h>@interface UIButton (CenterImageAndTitle)//上下居中，图片在上，文字在下- (void)verticalCenterImageAndTitle:(CGFloat)spacing;- (void)verticalCenterImageAndTitle; //默认6.0//左右居中，文字在左，图片在右- (void)horizontalCenterTitleAndImage:(CGFloat)spacing;- (void)horizontalCenterTitleAndImage; //默认6.0//左右居中，图片在左，文字在右- (void)horizontalCenterImageAndTitle:(CGFloat)spacing;- (void)horizontalCenterImageAndTitle; //默认6.0//文字居中，图片在左边- (void)horizontalCenterTitleAndImageLeft:(CGFloat)spacing;- (void)horizontalCenterTitleAndImageLeft; //默认6.0//文字居中，图片在右边- (void)horizontalCenterTitleAndImageRight:(CGFloat)spacing;- (void)horizontalCenterTitleAndImageRight; //默认6.0@end

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//#import "UIButton+CenterImageAndTitle.m"#import "UIButton+CenterImageAndTitle.h"@implementation UIButton (CenterImageAndTitle)- (void)verticalCenterImageAndTitle:(CGFloat)spacing{    // get the size of the elements here for readability    CGSize imageSize = self.imageView.frame.size;    CGSize titleSize = self.titleLabel.frame.size;        // lower the text and push it left to center it    self.titleEdgeInsets = UIEdgeInsetsMake(0.0, - imageSize.width, - (imageSize.height + spacing/2), 0.0);        // the text width might have changed (in case it was shortened before due to    // lack of space and isn't anymore now), so we get the frame size again    titleSize = self.titleLabel.frame.size;        // raise the image and push it right to center it    self.imageEdgeInsets = UIEdgeInsetsMake(- (titleSize.height + spacing/2), 0.0, 0.0, - titleSize.width);}- (void)verticalCenterImageAndTitle{    const int DEFAULT_SPACING = 6.0f;    [self verticalCenterImageAndTitle:DEFAULT_SPACING];}- (void)horizontalCenterTitleAndImage:(CGFloat)spacing{    // get the size of the elements here for readability    CGSize imageSize = self.imageView.frame.size;    CGSize titleSize = self.titleLabel.frame.size;        // lower the text and push it left to center it    self.titleEdgeInsets = UIEdgeInsetsMake(0.0, - imageSize.width, 0.0, imageSize.width + spacing/2);        // the text width might have changed (in case it was shortened before due to    // lack of space and isn't anymore now), so we get the frame size again    titleSize = self.titleLabel.frame.size;        // raise the image and push it right to center it    self.imageEdgeInsets = UIEdgeInsetsMake(0.0, titleSize.width + spacing/2, 0.0, - titleSize.width);}- (void)horizontalCenterTitleAndImage{    const int DEFAULT_SPACING = 6.0f;    [self horizontalCenterTitleAndImage:DEFAULT_SPACING];}- (void)horizontalCenterImageAndTitle:(CGFloat)spacing;{    // get the size of the elements here for readability    //    CGSize imageSize = self.imageView.frame.size;    //    CGSize titleSize = self.titleLabel.frame.size;        self.titleEdgeInsets = UIEdgeInsetsMake(0.0,  0.0, 0.0,  - spacing/2);    self.imageEdgeInsets = UIEdgeInsetsMake(0.0, - spacing/2, 0.0, 0.0);}- (void)horizontalCenterImageAndTitle;{    const int DEFAULT_SPACING = 6.0f;    [self horizontalCenterImageAndTitle:DEFAULT_SPACING];}- (void)horizontalCenterTitleAndImageLeft:(CGFloat)spacing{    // get the size of the elements here for readability    //    CGSize imageSize = self.imageView.frame.size;    //    CGSize titleSize = self.titleLabel.frame.size;        self.imageEdgeInsets = UIEdgeInsetsMake(0.0, - spacing, 0.0, 0.0);}- (void)horizontalCenterTitleAndImageLeft{    const int DEFAULT_SPACING = 6.0f;    [self horizontalCenterTitleAndImageLeft:DEFAULT_SPACING];}- (void)horizontalCenterTitleAndImageRight:(CGFloat)spacing{    // get the size of the elements here for readability    CGSize imageSize = self.imageView.frame.size;    CGSize titleSize = self.titleLabel.frame.size;        // lower the text and push it left to center it    self.titleEdgeInsets = UIEdgeInsetsMake(0.0, - imageSize.width, 0.0, 0.0);        // the text width might have changed (in case it was shortened before due to    // lack of space and isn't anymore now), so we get the frame size again    titleSize = self.titleLabel.frame.size;        // raise the image and push it right to center it    self.imageEdgeInsets = UIEdgeInsetsMake(0.0, titleSize.width + imageSize.width + spacing, 0.0, - titleSize.width);}- (void)horizontalCenterTitleAndImageRight{    const int DEFAULT_SPACING = 6.0f;    [self horizontalCenterTitleAndImageRight:DEFAULT_SPACING];}@end

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使用方法非常简单：

//在使用的地方引入#import "UIButton+CenterImageAndTitle.h"#define kScreenHeight [[UIScreen mainScreen] bounds].size.height      //屏幕高度#define kScreenWidth [[UIScreen mainScreen] bounds].size.width      //屏幕宽度

为了展现所有效果，简单展示一下：

for (int i = 0; i< 6; i++)    {        UIButton *button1 = [UIButton buttonWithType:UIButtonTypeCustom];        button1.frame = CGRectMake(60, 80+i*60, kScreenWidth-60*2, 45);        button1.tag = i;        button1.backgroundColor = [UIColor greenColor];        button1.titleLabel.font = [UIFont systemFontOfSize:15];        [button1 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];        [button1 setImage:[UIImage imageNamed:@"good"] forState:UIControlStateNormal];        [button1 setTitle:@"小韩哥的博客更新了" forState:UIControlStateNormal];        [button1 addTarget:self action:@selector(testAction:) forControlEvents:UIControlEventTouchUpInside];        [self.view addSubview:button1];                switch (i)        {            case 0:            {                //系统默认图片在左，文字在右，间隔为0            }                break;                            case 1:            {                //上下居中，图片在上，文字在下                [button1 verticalCenterImageAndTitle:10.0f];            }                break;                            case 2:            {                //左右居中，文字在左，图片在右                [button1 horizontalCenterTitleAndImage:50.0f];            }                break;                            case 3:            {                //左右居中，图片在左，文字在右                [button1 horizontalCenterImageAndTitle:50.0f];            }                break;                            case 4:            {                //文字居中，图片在左边                [button1 horizontalCenterTitleAndImageLeft:50.0f];            }                break;                            case 5:            {                //文字居中，图片在右边                [button1 horizontalCenterTitleAndImageRight:50.0f];            }                break;                            default:                break;        }    }

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最后是点击事件了：

- (void)testAction:(UIButton *)sender{    NSLog(@"testAction:%ld", (long)sender.tag);}

最终效果：

如有问题可通过微博互动联系我哦！

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Demo下载地址：https://github.com/XiaoHanGe/UIButtonCenterTitleAndImage

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