Clash Royale CLAN TAG#URR8PPP

Exception not handled in JSONObjectWithData iOS?

I am getting random crash while parsing NSData into dictionary. I used following code.

-(NSArray *)enumDataParser:(NSMutableData *)responseData

@try
NSError *error;
NSDictionary *jsonDictionary = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error];

@catch (NSException *exception)
[[IFieldServiceCrashLog sharedLog] writeExceptionLogFile:exception];
[self performCatchOperation:exception];




Sometimes i am getting "nil" (Fine in worse case) but sometimes my app crash(Exception not catched).

I am sure responseData is not nil, When crash happens "error" does not give me reason (error found as nil).

App crash at method "JSONObjectWithData" itself. How i can fix this or handle in exception?

responseData

responseData

@try @catch

responseData

NSData

NSString

NSData

dataUsingEncoding

1 Answer
1

JSON Deserialization only Dictionary or Array, so you can check and see the log.
Other, see options type: -> Enumeration NSJSONReadingOptions like "options:NSJSONReadingAllowFragments"

typedef enum NSJSONReadingOptions : NSUInteger
NSJSONReadingMutableContainers = (1UL << 0),
NSJSONReadingMutableLeaves = (1UL << 1),
NSJSONReadingAllowFragments = (1UL << 2)
NSJSONReadingOptions;


Example:

NSError *error = nil;

id jsonObject = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:&error];

if (error != nil)
NSLog(@"***** %@", error.localizedDescription);
else if (jsonObject != nil)
NSLog(@"*** JSON Data converted to NSObject!");
if ([jsonObject isKindOfClass:[NSDictionary class]])
NSDictionary *deserializedDictionary = (NSDictionary *)jsonObject;
NSLog(@"JSON Obj class: %@", NSStringFromClass([deserializedDictionary class]));
NSLog(@"*** its Dictionary Object from JSON Data: %@", deserializedDictionary.description);
else if ([jsonObject isKindOfClass:[NSArray class]])
NSArray *deserializedArray = (NSArray *)jsonObject;
NSLog(@"JSON Obj class: %@", NSStringFromClass([deserializedArray class]));
NSLog(@"*** its Array Object from JSON Data: %@", deserializedArray.description);
else
NSLog(@"JSON Obj class: %@", NSStringFromClass([jsonObject class]));
NSLog(@"*** its UNKNOWN Object from JSON Data: %@", jsonObject);




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