iOS - 將Xcode控制檯Log日誌轉爲文本文件

1.在AppDelegate.m中創建函數實現以下代碼塊:

 

 #pragma mark - 自定義方法,將nslog的輸出信息寫入到dr.log文件中
 - (void)nslogToFile
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentDirectory = [paths objectAtIndex:0];
NSString *fileName = [NSString stringWithFormat:@"NSLog.txt"];// 注意不是NSData!

NSString *logFilePath = [documentDirectory stringByAppendingPathComponent:fileName];
// 先刪除已經存在的文件
NSFileManager *defaultManager = [NSFileManager defaultManager];
[defaultManager removeItemAtPath:logFilePath error:nil];

// 將log輸入到文件
freopen([logFilePath cStringUsingEncoding:NSASCIIStringEncoding], "a+", stdout);

freopen([logFilePath cStringUsingEncoding:NSASCIIStringEncoding], "a+", stderr);

}

2.然後在didFinishLaunchingWithOptions方法裏面調用

 

- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
     [self  nslogToFile];
}