关于调用摄像头代码
UIActionSheet *actionSheet=[[UIActionSheet alloc] initWithTitle:@"" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Take Photo",@"Choose From Library",nil];
actionSheet.actionSheetStyle=self.navigationController.navigationBar.barStyle;
[actionSheet showInView:self.view.superView]
[actionSheet release];