iOS json 解析遇到error： Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed.__編程

 Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (Unescaped control character around character 1419.) UserInfo=0x1563cdd0 {NSDebugDescription=Unescaped control character around character 1419.}

之前解析json的時候都是標準格式，json資料當中沒有 \n \r \t 等定位字元。

今天在解析的時候發現json解析時好時壞，用線上json解析也米有問題。找了半天終於發現是定位字元在作怪，由於標準的json解析是不允許有這幾個定位字元的。所以在收到保溫的時候我們需要把這幾個定位字元給過濾掉。

 NSString * responseString = [request responseString];

    responseString = [responseString stringByReplacingOccurrencesOfString:@"\r\n" withString:@""];

    responseString = [responseString stringByReplacingOccurrencesOfString:@"\n" withString:@""];

    responseString = [responseString stringByReplacingOccurrencesOfString:@"\t" withString:@""];

    NSLog(@"responseString = %@",responseString);

    

    SBJsonParser *parser = [[[SBJsonParser alloc]init] autorelease];

    id returnObject = [parser objectWithString:responseString];

    NSDictionary *userInfo = nil;

    NSArray *userArr = nil;

    if ([returnObject isKindOfClass:[NSDictionary class]]) {

        if (userInfo) {

            [userArr release];

        }

        userInfo = (NSDictionary*)returnObject;

    }

    else if ([returnObject isKindOfClass:[NSArray class]]) {

        userArr = (NSArray*)returnObject;

        

    }

    

    NSError* e = nil;

    

//系統內建的解析方式。

    NSDictionary * userInfo = [NSJSONSerialization JSONObjectWithData:[jsonString dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableLeaves error:&e];

    if (e) {

        NSLog(@"%@",e);

    }