NSStringEncoding gbkEncoding = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
str = [str stringByAddingPercentEscapesUsingEncoding:gbkEncoding];//转字符串
NSData *deviceNoteData = [str dataUsingEncoding:gbkEncoding];//转data
iOS小demo之NSString转GBK编码
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转载自blog.csdn.net/q1194259339/article/details/80491808
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