UIButton删除所有目标操作 [英] UIButton remove all target-actions

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本文介绍了UIButton删除所有目标操作的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我已将多个target-action-forControlEvents:添加到UIButton。我想一次性删除所有这些,而不释放任何东西。然后我会设定新的目标。



这是否可行,我该怎么做?

解决方案

致电 removeTarget:动作:forControlEvents:时,通过零为目标,为NULL动作,并使用该设置所有位(UIControlEventAllEvents)的控制掩模<。 / p>

Objective-C

  [someControl removeTarget:nil 
action:NULL
forControlEvents:UIControlEventAllEvents];

Swift 2

  button.removeTarget(nil,action:nil,forControlEvents:.AllEvents)

Swift 3

  button.removeTarget(nil,action:nil,for :。allEvents)


I have added multiple target-action-forControlEvents: to a UIButton. I'd like to remove all of these in one go without deallocating anything. I will then set new targets.

Is this possible and how do I go about it?

解决方案

Call removeTarget:action:forControlEvents:, pass nil for the target, NULL for action, and use a control mask that sets all bits (UIControlEventAllEvents).

Objective-C

[someControl removeTarget:nil 
                   action:NULL 
         forControlEvents:UIControlEventAllEvents];

Swift 2

button.removeTarget(nil, action: nil, forControlEvents: .AllEvents)

Swift 3

button.removeTarget(nil, action: nil, for: .allEvents)

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