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 }
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