如何再檢查一下按鈕

Question

我開發一個應用程序中，我有當用戶在通訊錄中點擊它旋轉一個刪除按鈕如下

[UIView beginAnimations:nil context:nil]; 

    [UIView setAnimationDuration:.5]; 

    btn.transform=CGAffineTransformMakeRotation((0.0174532925)*90); 

    //put the -ve sign before 30 if you want to rotate the button in the anticlockwise else use this one 

    [UIView commitAnimations]; 
    selectedRow=btn.tag; 
    [self.tableView reloadData]; 

我要重新加載表時，動畫完成後如何轉我可以這樣做嗎？

Answer 1

[UIView beginAnimations:@"rotateButton" context:nil]; 
[UIView setAnimationDuration:.5]; 
[UIView setAnimationDelegate:self]; 
[UIView setAnimationDidStopSelector:@selector(myAnimDidStop:finished:context:)]; 
btn.transform = CGAffineTransformMakeRotation((0.0174532925)*90); 
[UIView commitAnimations]; 
selectedRow = btn.tag; 

的委託方法是這樣的：

- (void)myAnimDidStop:(NSString *)animID finished:(BOOL)finished context:(void*)ctx { 
    if ([@"rotateButton" isEqualToString:animID]) { 
     [self.tableView reloadData]; 
    } 
} 

請注意，如果您的目標的iOS 4和更新，你可以使用動畫塊：

[UIView animateWithDuration:0.5 
       animations:^{ 
        btn.transform = CGAffineTransformMakeRotation((0.0174532925)*90); 
        selectedRow = btn.tag; 
       } 
       completion:^(BOOL finished) { 
        [self.tableView reloadData]; 
       }];