拖放無需拆卸的UIButton

我實現在iPhone應用程序拖拽系統。到目前爲止，我設法實現了可拖動按鈕，並且工作正常。這是代碼，我有：拖放無需拆卸的UIButton

首先，我給你的動作按鈕：

[button addTarget:self action:@selector(imageMoved:withEvent:) forControlEvents:UIControlEventTouchDragInside];

然後，我創建了阻力：

- (IBAction) imageMoved:(id) sender withEvent:(UIEvent *) event 
{ 
    NSLog(@"moved"); 
    CGPoint point = [[[event allTouches] anyObject] locationInView:self.view]; 
    UIControl *control = sender; 
    control.center = point; 
}

不過，我想達到的目標被拖動的按鈕不會從它所在的位置移除。所以我想到了一種解決方案，即創建一個類似於第一個按鈕的新按鈕並移動這個新創建的按鈕。但是我在實施這最後一部分時遇到了麻煩。有什麼幫助嗎？非常感謝！

來源

2011-09-07 Bruno Morgado

- (IBAction) imageMoved:(id) sender withEvent:(UIEvent *) event { 
    NSLog(@"moved");   

    CGPoint point = [[[event allTouches] anyObject] locationInView:self.view]; 

    if (![self.view viewWithTag:11]) { 

     NSData *archivedData = [NSKeyedArchiver archivedDataWithRootObject:(UIButton*)sender];     

     UIButton *anotherButton =(UIButton*) [NSKeyedUnarchiver unarchiveObjectWithData:archivedData]; 

     anotherButton.tag = 11;  


     UIImage *senderImage=[(UIButton *)sender imageForState:UIControlStateNormal]; 




     CGImageRef cgImage = [senderImage CGImage]; 


     UIImage *copyOfImage = [[UIImage alloc] initWithCGImage:cgImage]; 



     [anotherButton setImage:copyOfImage forState:UIControlStateNormal]; 

     [self.view addSubview:anotherButton]; 
    } 

    [self.view viewWithTag:11].center = point; 
}

來源

2011-09-07 13:36:37

感謝這麼多的響應。這似乎是正確的我所需要的，但不知它拋出異常：' - [UIImage的encodeWithCoder：]：當它到達線無法識別的選擇發送到實例0x6323500'：'NSData的* archivedData =的NSKeyedArchiver archivedDataWithRootObject：發件人]' 。你能看到拋出異常的東西嗎？ –

ü要求移動的UIButton但你用它來的UIImageView –

更新退房 –

要刪除您可以在原點按鈕添加兩個事件，像這樣的限制：

[button addTarget:self action:@selector(imageMoved:withEvent:) forControlEvents:UIControlEventTouchDragInside]; 
[button addTarget:self action:@selector(imageMoved:withEvent:) forControlEvents:UIControlEventTouchDragOutside];

這樣，當你退出當前視圖的邊界事件將觸發太（您的按鈕）你就可以將所有新的按鈕都移到超級視圖的旁邊。

來源

2014-01-03 11:47:46 wolffan

拖放無需拆卸的UIButton

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