iOS中字典转与JSON NSData之间的互相转换

1.字典转json

NSError*parseError =nil;

NSData*jsonData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrintederror:&parseError];

NSString*str =[[NSStringalloc]initWithData:jsonDataencoding:NSUTF8StringEncoding];

NSLog(@"JSON: %@", str);

2.json转字典

//转data

NSData* data = [resultdataUsingEncoding:NSUTF8StringEncoding];

NSDictionary*jsonDict = [NSJSONSerializationJSONObjectWithData:dataoptions:NSJSONReadingMutableLeaveserror:nil];