oc语言复制视频文件

 1 void copyFile()

 2 {

 3     NSString *home=NSHomeDirectory();

 4     NSString *path=[NSString stringWithFormat:@"%@/desktop/oc.mp4",home];

 5     NSString *path1=[NSString stringWithFormat:@"%@/desktop/oc1.mp4",home];

 6     NSFileHandle *handle=[NSFileHandle fileHandleForReadingAtPath:path];

 7     NSFileManager *fm=[NSFileManager defaultManager];

 8     BOOL ret=NO;

 9     if ([fm fileExistsAtPath:path1])

10     {

11         NSLog(@"存在");

12     }

13     else

14     {

15        ret= [fm createFileAtPath:path1 contents:nil attributes:nil];

16     

17     }

18     NSFileHandle *writeHandle=[NSFileHandle fileHandleForWritingAtPath:path1];

19     NSData *data=nil;

20     if (ret==YES)

21     {

22         data=[handle readDataOfLength:1024*1024];

23         while ([data length]==1024*1024)

24         {

25             [writeHandle writeData:data];

26             data=[handle readDataOfLength:1024*1024];

27         }

28         [writeHandle writeData:data];

29     }

30     [handle closeFile];

31     [writeHandle closeFile];

32 

33 }