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#Objective-C Debug 学习

子文的博客

只会写代码的程序员不是好程序员，程序员是一个从制造bug到解决bug的死循环中不断成长，

NSLog(@"Founction:%s\n Pretty founction:%s\n Line:%d\n File:%s\n Object:%@",__func__,__PRETTY_FUNCTION__, __LINE__, __FILE__, self );

输出结果

2015-03-11 15:33:20.316 ssss[4080:184167] 
 Founction:-[AppDelegate application:didFinishLaunchingWithOptions:]
 Pretty founction:-[AppDelegate application:didFinishLaunchingWithOptions:]
 Line:19
 File:/Users/ziwen/Desktop/artical/ssss/ssss/AppDelegate.m
 Object:<AppDelegate: 0x7f8beb416980>

上述结果原因是 func, PRETTY_FUNCTION, LINE, __FILE__等都是系统预留的定义词，简单易用。

同时还有一些系统方法可以从CFString 转换为NSString。包括且不限于selector，class，protocol等，参考下面的代码：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
NSLog(@"Current selector: %@", NSStringFromSelector(_cmd));
NSLog(@"Filename: %@", [[NSString stringWithUTF8String:__FILE__] lastPathComponent]);
NSLog(@"object class：%@",NSStringFromClass([self class]));
return YES;
}

输出结果如下：

2015-03-11 15:38:10.034 ssss[4104:186832] Current selector: application:didFinishLaunchingWithOptions:
2015-03-11 15:38:10.034 ssss[4104:186832] Filename: AppDelegate.m
2015-03-11 15:38:10.034 ssss[4104:186832] object class：AppDelegate

通过拿到字符串做一些其他操作，是不是很hi，duang，duang。

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