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有几种方法能将NSLog内容输出到文件
1)
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *logPath = [documentsDirectory stringByAppendingPathComponent:@"console.log"]; freopen([logPath cStringUsingEncoding:NSASCIIStringEncoding],"a+",stderr);
2)自己写log
// file Log.h #define NSLog(args...) _Log(@"DEBUG ", __FILE__,__LINE__,__PRETTY_FUNCTION__,args); @interface Log : NSObject void _Log(NSString *prefix, const char *file, int lineNumber, const char *funcName, NSString *format,...); @end // file Log.m #import "Log.h" @implementation Log void _Log(NSString *prefix, const char *file, int lineNumber, const char *funcName, NSString *format,...) { va_list ap; va_start (ap, format); format = [format stringByAppendingString:@"\n"]; NSString *msg = [[NSString alloc] initWithFormat:[NSString stringWithFormat:@"%@",format] arguments:ap]; va_end (ap); fprintf(stderr,"%s%50s:%3d - %s",[prefix UTF8String], funcName, lineNumber, [msg UTF8String]); [msg release]; } @end