Iphone 如何替换(n?)UIButton的现有操作?
到目前为止,我一直在使用Iphone 如何替换(n?)UIButton的现有操作?,iphone,uibutton,Iphone,Uibutton,到目前为止,我一直在使用 [button1 addTarget:self action:@selector(newAction) forControlEvents:UIControlEventTouchUpInside]; 这增加了一个额外的动作(我想)。如何用新操作替换初始操作?您可以删除以下特定操作的目标: [button1 removeTarget: self action: @selector(oldAction) forControlEvents: UIControlEventTou
[button1 addTarget:self action:@selector(newAction) forControlEvents:UIControlEventTouchUpInside];
这增加了一个额外的动作(我想)。如何用新操作替换初始操作?您可以删除以下特定操作的目标:
[button1 removeTarget: self action: @selector(oldAction) forControlEvents: UIControlEventTouchUpInside]
[button1 removeTarget: nil action: NULL forControlEvents: UIControlEventAllEvents]
或者,更好的是,您可以像这样从按钮中删除所有目标:
[button1 removeTarget: self action: @selector(oldAction) forControlEvents: UIControlEventTouchUpInside]
[button1 removeTarget: nil action: NULL forControlEvents: UIControlEventAllEvents]
然后,您可以添加新的目标操作:
[button1 addTarget:self action:@selector(newAction) forControlEvents: UIControlEventTouchUpInside];
差不多就是这样
希望这有帮助,
Pawel首先必须使用removeTarget:action:forControlEvents:删除当前操作,然后使用addTarget:action:forControlEvents:添加新操作。我认为可以接受UIButton,是的。要删除所有以前的操作:
[button1 removeTarget:nil action:NULL forControlEvents:uicontrolEvents]
-请参阅