沙盒文件

NSString *docment = [NSSearchPathForDirectoriesInDomains(NSDesktopDirectory, NSUserDomainMask, YES)objectAtIndex:0];

NSArray *array = @[@"1",@"2"];

NSString *str1Path = [docment stringByAppendingPathComponent:@"array.plist"];

[array writeToFile:str1Path atomically:YES];

创建NSData对象

NSData *data = [NSData dataWithContentsOfFile:str1Path];

// 1 : 创建一个MD5的对象

CC_MD5_CTX md5;

// 2 : 初始化MD5对象

CC_MD5_Init(&md5);

// 3 : 准备MD5加密

CC_MD5_Update(&md5, data.bytes, (CC_LONG)data.length);

// 4: 准备一个字符串数组,存储MD5加密之后的数据

unsigned char resly[CC_MD5_DIGEST_LENGTH];

// 5: 结束MD5的加密

CC_MD5_Final(resly, &md5);

NSMutableString *resulString = [NSMutableString string];

for (int i = 0; i< CC_MD5_DIGEST_LENGTH; i++) {

[resulString appendFormat:@"%02X", resly[i]];

}

NSLog(@"result ==== %@", resulString);

}