Objective-C语言NSDictionary转换成JSON
示例
NSDictionary *myDictionary = [[NSDictionary alloc] initWithObjectsAndKeys:@"value1", @"key1", @"value2", @"key2", nil]; NSMutableDictionary *mutableDictionary = [myDictionary mutableCopy]; NSData *data = [NSJSONSerialization dataWithJSONObject:myDictionary options:NSJSONWritingPrettyPrinted error:nil]; NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
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