[問題] 判斷字串編碼
問題,用NSURLRequest, NSURLConnection去連http得到資料
會得到NSData 跟一個 NSURLResponse
response裡面會有http的header (要先casting成NSHttpResponse)
header裡面有時候會說encoding (Content-type)
有時候不會
如果 header裡面沒有的話
又要把NSData轉成NSString
有什麼好的方法可以自動判斷的?
還是就一個一個試..?
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