iOS将字符串编码为unicode

Question

我有一个字符串，都有英文字母和日文字符。我需要在将数据传输到服务器之前将日语字符转换为Unicode。我发现很多主题转换为UTF-8，但在转换为Unicode时我没有找到任何东西。

旁注：我还注意到，如果我将字符串放在数组中并使用NSLog打印数组，则日文文本将以Unicode格式打印。

NSString *data = @"aさ";
NSArray *array = [NSArray arrayWithObjects: data, other data..., nil];
NSLog(@"%@", array);

这将打印出：“a \ U3055”表示我在数组中的字符串数据。

Answer 1

NSData *dataenc = [data dataUsingEncoding:NSNonLossyASCIIStringEncoding];
NSString *encodevalue = [[NSString alloc]initWithData:dataenc encoding:NSUTF8StringEncoding];

Answer 2

-(NSString *)StringWithData:(NSString *)Encoded {

NSString *decoded = (__bridge_transfer NSString *)CFURLCreateStringByReplacingPercentEscapesUsingEncoding(NULL, (CFStringRef)Encoded, CFSTR(""), kCFStringEncodingUTF8);
return [decoded stringByReplacingOccurrencesOfString:@"+" withString:@" "];
}

- (NSString *)EncodceStringWithData:(NSString *)Encoded {

NSString *urlEncoded = (NSString *)CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes( NULL, (CFStringRef)Encoded, NULL, (CFStringRef)@"!*'\"();:@&=+$,/?%#[]% ", kCFStringEncodingUTF8));
return [urlEncoded stringByReplacingOccurrencesOfString:@"%20" withString:@"+"];
}