iOS将控制台Log日志转为输出为文本文件_SuYuMingXiangGuan的博客

- (void)redirectNSlogToDocumentFolder

{

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSString *documentDirectory = [paths objectAtIndex:0];

    NSString *fileName = [NSString stringWithFormat:@"MrNSLog.txt"];// 注意不是NSData!

    NSString *logFilePath = [documentDirectory stringByAppendingPathComponent:fileName];

    // 先删除已经存在的文件

    NSFileManager *defaultManager = [NSFileManager defaultManager];

    [defaultManager removeItemAtPath:logFilePath error:nil];



    // 将log输入到文件

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

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

}


2.在didFinishLaunchingWithOptions中调用 : 
[self redirectNSlogToDocumentFolder];- (void)redirectNSlogToDocumentFolder

{

    N