IOS json parsing encounters error: Error Domain = NSCocoaErrorDomain Code = 3840 & amp; quot; The operation couldn't be completed.

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 Round character 1419 .}

Previously, json was parsed in standard format, and no tabs such as \ n \ r \ t were found in json data.

During the parsing today, we found that json resolution is good or bad, and there is also a problem with online json resolution. After searching for half a day, I finally found that the tabs are playing a strange role, because the standard json parsing does not allow these tabs. Therefore, when receiving the heat preservation, We need to filter out these tabs.

NSString * responseString = [requestresponseString];

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

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

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

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

SBJsonParser * parser = [[SBJsonParseralloc] init] autorelser];

Id returnObject = [parser objectWithString:ResponseString];

NSDictionary * userInfo = nil;

NSArray * userArr = nil;

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

If (userInfo ){

[UserArrrelease];

}

UserInfo = (NSDictionary *) returnObject;

}

Else if ([returnObjectisKindOfClass: [NSArrayclass]) {

UserArr = (NSArray *) returnObject;

}

NSError * e = nil;

// Resolution method provided by the system.

NSDictionary *UserInfo = [NSJSONSerializationJSONObjectWithData: [jsonString dataUsingEncoding: NSUTF8StringEncoding] options: NSJSONReadingMutableLeaveserror: & e];

If (e ){

NSLog (@ "% @", e );

}