objective-c - 从 NSString 到字节然后再返回 NSString 时出现奇怪的字符

Question

NSString *message = @"testing";    
NSUInteger dataLength = [message lengthOfBytesUsingEncoding:NSUnicodeStringEncoding];
void *byteData = malloc( dataLength );
NSRange range = NSMakeRange(0, [message length]);
NSUInteger actualLength = 0;
NSRange remain;
BOOL result =   [message getBytes:byteData maxLength:dataLength usedLength:&actualLength encoding:NSUnicodeStringEncoding options:0 range:range remainingRange:&remain];
NSString *decodedString = [[NSString alloc] initWithBytes:byteData length:actualLength encoding:NSUnicodeStringEncoding];

我的问题是我希望对decodedString进行测试，但它看起来像中文字符。我认为这可能是空终止数据的问题，但看起来这不应该是问题。

Answer 1

你想要这样的东西吗？

    NSString *message = @"testing";    
    NSData *bytes = [message dataUsingEncoding:NSUTF8StringEncoding];
    NSString* messageDecoded = [[NSString alloc] initWithData:bytes encoding:NSUTF8StringEncoding];
    NSLog(@"decoded: %@", messageDecoded);