如何在快速语言中使用CC_MD5方法 [英] How to use CC_MD5 method in swift language
本文介绍了如何在快速语言中使用CC_MD5方法的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
在Objective-c中,我们可以像这样对字符串进行哈希处理:
in Objective-c, we can hash a string like this:
const char *cStr = [someString UTF8String];
unsigned char result[16];
CC_MD5( cStr, strlen(cStr), result );
md5String = [NSString stringWithFormat:
@"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
result[0], result[1], result[2], result[3],
result[4], result[5], result[6], result[7],
result[8], result[9], result[10], result[11],
result[12], result[13], result[14], result[15]
];
但是CC_MD5在Swift中不起作用.我们该如何处理?
But CC_MD5 doesn't work in Swift. How do we deal with this?
推荐答案
这是我想到的.它是String的扩展.
不要忘记在Xcode创建的ObjC-Swift桥接标头中添加#import <CommonCrypto/CommonCrypto.h>
.
This is what I came up with. It's an extension to String.
Don't forget to add #import <CommonCrypto/CommonCrypto.h>
to the ObjC-Swift bridging header that Xcode creates.
extension String {
var md5: String! {
let str = self.cStringUsingEncoding(NSUTF8StringEncoding)
let strLen = CC_LONG(self.lengthOfBytesUsingEncoding(NSUTF8StringEncoding))
let digestLen = Int(CC_MD5_DIGEST_LENGTH)
let result = UnsafeMutablePointer<CUnsignedChar>.alloc(digestLen)
CC_MD5(str!, strLen, result)
let hash = NSMutableString()
for i in 0..<digestLen {
hash.appendFormat("%02x", result[i])
}
result.dealloc(digestLen)
return String(format: hash as String)
}
}
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