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Objective-CでJSONを使う

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頻繁に使うわけじゃなくて、毎回使うときに忘れるのでメモ。
NSStringからNSDataを生成して、それをJSONSerializationする、という流れ。

NSString *jsonString = @"{\
    \"body\": \"hoge\",\
    \"fuga\": \"foo\"\
}";

NSData *data = [jsonString dataUsingEncoding:NSUTF8StringEncoding];

NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data 
                                                     options:NSJSONReadingAllowFragments
                                                       error:nil];

// JSONのパースに失敗した場合は`nil`が入る
if (json) {
	NSLog(@"%@", json);
}
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