调试IOS页面布局

最新推荐文章于 2019-01-20 00:29:23 发布

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最新推荐文章于 2019-01-20 00:29:23 发布

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分类专栏： IOS 文章标签： debug Debug deBug layout Layout UIResponder uiview UIView UIVIew

本文链接：https://blog.youkuaiyun.com/thy3368/article/details/8571364

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我们在项目中，经常会遇到IOS面面布局不对，感觉明明自己写对了，但是显示出来就是有问题。有什么办法能更好的找出问题呢？

利器之一，打印出该view的响应链关系。

#import "UIResponder+Debug.h"

@implementation UIResponder (Debug)

-(void)dumpResponderRerecursively{
    UIResponder* nextResponder=self;
    do {
        NSLog(@"nextResponder is %@",nextResponder);
        nextResponder=[nextResponder nextResponder];
    } while (nextResponder);
}

@end

并在显示的地方调用该方法

-(void)viewDidAppear:(BOOL)animated{
    [super viewDidAppear:animated];
    [_webview dumpResponderRerecursively];

}

run project. 从console得到log

2013-02-05 13:01:50.814 Taobao2013[6722:907] nextResponder is <UIWebView: 0x1f85ebf0; frame = (0 0; 320 548); layer = <CALayer: 0x1f85ebc0>>

2013-02-05 13:01:50.815 Taobao2013[6722:907] nextResponder is <UIView: 0x1f85efd0; frame = (0 20; 320 548); autoresize = W; layer = <CALayer: 0x1f85efa0>>

2013-02-05 13:01:50.816 Taobao2013[6722:907] nextResponder is <SearchHtml5ListController: 0x1f85fdc0>

2013-02-05 13:01:50.817 Taobao2013[6722:907] nextResponder is <UIView: 0x1f85f2e0; frame = (0 0; 320 548); clipsToBounds = YES; autoresize = W+H; animations = { position=<CABasicAnimation: 0x1f854540>; }; layer = <CALayer: 0x1f856c80>>

2013-02-05 13:01:50.818 Taobao2013[6722:907] nextResponder is <UIView: 0x1f8a8110; frame = (0 0; 320 548); autoresize = W+H; layer = <CALayer: 0x1f8a9c50>>

2013-02-05 13:01:50.818 Taobao2013[6722:907] nextResponder is <UIView: 0x1f8a46b0; frame = (0 0; 320 548); clipsToBounds = YES; autoresize = W+H; layer = <CALayer: 0x1f8a4710>>

2013-02-05 13:01:50.819 Taobao2013[6722:907] nextResponder is <NavigationController: 0x1edcbdb0>

2013-02-05 13:01:50.820 Taobao2013[6722:907] nextResponder is <UIView: 0x1f8a4480; frame = (0 0; 320 548); clipsToBounds = YES; autoresize = W+H; layer = <CALayer: 0x1f8aa490>>

2013-02-05 13:01:50.821 Taobao2013[6722:907] nextResponder is <UIView: 0x1f8a4200; frame = (0 0; 320 548); autoresize = W+H; layer = <CALayer: 0x1f8a4260>>

2013-02-05 13:01:50.822 Taobao2013[6722:907] nextResponder is <UIView: 0x1f896010; frame = (0 20; 320 548); autoresize = W+H; layer = <CALayer: 0x1f8961d0>>

2013-02-05 13:01:50.823 Taobao2013[6722:907] nextResponder is <MainViewController: 0x1edcb670>

2013-02-05 13:01:50.824 Taobao2013[6722:907] nextResponder is <UIWindow: 0x1f884b60; frame = (0 0; 320 568); layer = <UIWindowLayer: 0x1f8849d0>>

2013-02-05 13:01:50.825 Taobao2013[6722:907] nextResponder is <UIApplication: 0x1f86cc10>

2013-02-05 13:01:50.827 Taobao2013[6722:907] nextResponder is <AppDelegate: 0x1f872e30>

我们发现了，为什么webview的在屏幕上偏移40的问题了，他的superview里面，有两个的origin.y是20，所以自己的偏移值是40了。