OC获取文件MD5值与swift字符串MD5加密方法
OC:
使用前需先#import <CommonCrypto/CommonDigest.h>
//path为文件路径
+(NSString *)getImageMD5:(NSString *)path{
NSFileHandle *handle = [NSFileHandle fileHandleForReadingAtPath:path];
if( handle== nil ) {
return nil;
}
CC_MD5_CTX md5;
CC_MD5_Init(&md5);
BOOL done = NO;
while(!done)
{
NSData* fileData = [handle readDataOfLength: 256 ];
CC_MD5_Update(&md5, [fileData bytes], [fileData length]);
if( [fileData length] == 0 ) done = YES;
}
unsigned char digest[CC_MD5_DIGEST_LENGTH];
CC_MD5_Final(digest, &md5);
NSString* s = [NSString stringWithFormat: @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
digest[0], digest[1],
digest[2], digest[3],
digest[4], digest[5],
digest[6], digest[7],
digest[8], digest[9],
digest[10], digest[11],
digest[12], digest[13],
digest[14], digest[15]];
return s;
}
swift：
使用方法，1，在header文件导入<CommonCrypto/CommonDigest.h>
2，在任意swift类中添加下边的方法。
3，调用 var fielad :NSString = 字符串.md5()
//字符串MD5加密
extension String{
func md5() ->String!{
let str = self.cStringUsingEncoding(NSUTF8StringEncoding)
let strLen = CUnsignedInt(self.lengthOfBytesUsingEncoding(NSUTF8StringEncoding))
let digestLen = Int(CC_MD5_DIGEST_LENGTH)
let result = UnsafeMutablePointer<CUnsignedChar>.alloc(digestLen)
CC_MD5(str!, strLen, result)
var hash = NSMutableString()
for i in 0 ..< digestLen {
hash.appendFormat("%02x", result[i])
}
result.destroy()
return String(format: hash as String)
}
}
