獲取文件MD5 值，使用OC自帶工具，使用時候需要

#import

，然後調用傳值

- (NSString*) md5:(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]];

NSLog(@"ssssss = %@",s);

return s;

}

NSString *filePath = [self inDocumentsDirectory:@"01-10-201417:06:39.mov"];

NSLog(@"--- filepath = /n%@",filePath);

NSLog(@"md5 = %@/n/n",[self md5:filePath]);

#pragma mark - NSFileManager Methods

//／／獲取文件路徑

- (NSString *)inDocumentsDirectory:(NSString *)path {

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentsDirectory = [paths objectAtIndex:0];

return [documentsDirectory stringByAppendingPathComponent:path];

}

／／ 輸出結果為

2014-01-10 17:43:36.630 testPaint[16629:60b] --- filepath =

/var/mobile/Applications/0FC082D4-371B-4DD6-A45D-FB632650D93F/Documents/01-10-201417:06:39.mov

2014-01-10 17:43:36.719 testPaint[16629:60b] ssssss = 82066e46ebce1de3a14cbd4d0d7ebf3c

2014-01-10 17:43:36.720 testPaint[16629:60b] md5 = 82066e46ebce1de3a14cbd4d0d7ebf3c