NSString編碼轉換

     常有編碼方式有很多種,現在列出之間的轉換方式

NSString To UFT-8

    NSString *str2 =@"深";    const char * s = [str2 UTF8String];

     出現類似這樣格式的欄位"\\U6df1\\U5733\\U56fd\\U5f00\\U884c01\\U673a\\U623",通常為Unicode碼,轉換測試函數為

- (NSString *)replaceUnicode:(NSString *)unicodeStr {      NSString *tempStr1 = [unicodeStr stringByReplacingOccurrencesOfString:@"\\u" withString:@"\\U"];      NSString *tempStr2 = [tempStr1 stringByReplacingOccurrencesOfString:@"\"" withString:@"\\\""];      NSString *tempStr3 = [[@"\"" stringByAppendingString:tempStr2] stringByAppendingString:@"\""];      NSData *tempData = [tempStr3 dataUsingEncoding:NSUTF8StringEncoding];      NSString* returnStr = [NSPropertyListSerialization propertyListFromData:tempData                                                             mutabilityOption:NSPropertyListImmutable                                                                        format:NULL                                                             errorDescription:NULL];          return [returnStr stringByReplacingOccurrencesOfString:@"\\r\\n" withString:@"\n"];  }  

    出現類似這樣格式的欄位"深圳银行",通常為GBK碼,轉換方式為

NSURL *url = [NSURL URLWithString:str2];    NSData *responseData = [NSData dataWithContentsOfURL:url];    NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);    NSString *responseString = [[NSString alloc] initWithData:responseData encoding:enc];