Question

假设我有一个文字字符串： “向我的小朋友问好”

函数应将十六进制值返回为：

5361792048656c6c6f20746f204d79204c6974746c6520467269656e64

Answer 1

Swift 4，Swift 3

Tuple

Answer 2

你可以这样做，

NSString *str = @"Say Hello to My Little Friend";
NSData *data = [str dataUsingEncoding:NSUTF8StringEncoding];

NSLog(@"data %@",data);

视频输出：data <53617920 48656c6c 6f20746f 204d7920 4c697474 6c652046 7269656e 64>

<强>夫特：

 let string = "Say Hello to My Little Friend"
 let data = string.dataUsingEncoding(NSUTF8StringEncoding)

斯威夫特3：

 let string = "Say Hello to My Little Friend"
 let data = string.data(using: String.Encoding.utf8)

Answer 3

无法用swift编写，但在Objective-C下面的代码可能就是你要找的东西：

    NSString * str = @"Say Hello to My Little Friend";

    NSString * hexString = [NSString stringWithFormat:@"%@",
                         [NSData dataWithBytes:[str cStringUsingEncoding:NSUTF8StringEncoding]
                                        length:strlen([str cStringUsingEncoding:NSUTF8StringEncoding])]];

    for(NSString * toRemove in [NSArray arrayWithObjects:@"<", @">", @" ", nil])
        hexString = [hexString stringByReplacingOccurrencesOfString:toRemove withString:@""];

    NSLog(@"hexStr:%@", hexString);

上面的代码给出了你给出的精确字符串：

5361792048656c6c6f20746f204d79204c6974746c6520467269656e64

希望它会有所帮助：）

如何将文本字符串转换为十六进制字符串？

3 个答案: