手机内存空间不够了的情况会crash

[Arvin-J]

[[NSFileHandle fileHandleForWritingAtPath:_cachedPath] truncateFileAtOffset:_expectedLength];

[jaybowang]

Exactly the same crash!

[jaybowang]

Exception message:

exception NSException * name:@"NSFileHandleOperationException" reason:@"*** -[NSConcreteFileHandle truncateFileAtOffset:]: No space left on device" 0x170d2560

And use @try can avoid this crash.

  @try {
    [[NSFileHandle fileHandleForWritingAtPath:_cachedPath] truncateFileAtOffset:_expectedLength];
  }
  @catch (NSException *exception) {
    // or use NSFileHandleOperationException instead of NSException
    NSLog(@"%@",exception.reason);
  }