Question

在我的应用中，我创建了一个按钮。单击该按钮时，执行一项长任务，并在任务启动时禁用该按钮，并在任务完成时启用该按钮。我的问题是，即使禁用了UI按钮，它也会注册click事件，并在任务完成后调用相同的方法。

我在下面附上了我的代码：

- (IBAction)sync_data_all:(id)sender {
  // disable button on main thread

  [NSThread detachNewThreadSelector:@selector(DisableButton) toTarget:self withObject:nil];

  UIApplication *app = [UIApplication sharedApplication];
  app.networkActivityIndicatorVisible = NO;

  // long tasks start

  [self fetchUNsyncedOrders];

  [self DeleteproductCategoryTable];
  [self deleteproductTable];

  [self deletecustomersGroupsTable];
  [self deletefetchCustomersTable];
  [self deletefetchCustomersAddress];

  [self deletefetchOrders];
  [self deletefetchOrderItems];
  [self deleteCreateOrdersGroups];

  [[UIApplication sharedApplication] setIdleTimerDisabled:YES];

  [NSThread detachNewThreadSelector:@selector(StartActivityIndicatorIn) toTarget:self withObject:nil];
  progress = 0.0f;

  [NSThread detachNewThreadSelector:@selector(progressBarProgress) toTarget:self withObject:nil];

  @try {
    [self productCategoryTable];
    progress = 0.3;

    [NSThread detachNewThreadSelector:@selector(progressBarProgress) toTarget:self withObject:nil];


    [self productTable];

    progress = 0.4;
    [NSThread detachNewThreadSelector:@selector(progressBarProgress) toTarget:self withObject:nil];

    [self customersGroupsTable];
    progress = 0.5;
    [NSThread detachNewThreadSelector:@selector(progressBarProgress) toTarget:self withObject:nil];


    [self fetchCustomersTable];

    progress = 0.6;

    [NSThread detachNewThreadSelector:@selector(progressBarProgress) toTarget:self withObject:nil];
    [self fetchCustomersAddress];

    progress = 0.7;

    [NSThread detachNewThreadSelector:@selector(progressBarProgress) toTarget:self withObject:nil];
    [self fetchOrders];

    progress = 0.8;

    [NSThread detachNewThreadSelector:@selector(progressBarProgress) toTarget:self withObject:nil];

    [self fetchOrderItems];
    progress = 1.0;

    [NSThread detachNewThreadSelector:@selector(progressBarProgress) toTarget:self withObject:nil];
    [self CreateOrdersGroups];
  }

  @catch (NSException *exception)
  {
    [NSThread detachNewThreadSelector:@selector(syncNotComplete) toTarget:self withObject:nil];

    syncError = YES;
  }

  @finally {
    [self performSelector:@selector(increaseProgress) withObject:nil afterDelay:0.0];
  }


  // long task stop

  [indicator stopAnimating];

  self.view.userInteractionEnabled = YES;
  _btn_sync_outlet.enabled = YES;
  _btn_sync_outlet.userInteractionEnabled = YES;
}

- (void)DisableButton {
  self.view.userInteractionEnabled = NO;
  _btn_sync_outlet.enabled = NO;
  _btn_sync_outlet.userInteractionEnabled = NO;
}

Answer 1

您必须正确禁用它。 UIButton.enabled状态的docs：

如果启用状态为NO，则控件忽略触摸事件和子类可能会有不同的描述。

通过添加DisableButton电话检查是否正在调用NSLog()，或使用GCD并完全取消DisableButton方法：

dispatch_sync(dispatch_get_main_queue(), ^{
    self.view.userInteractionEnabled = NO;
    _btn_sync_outlet.enabled = NO;
    _btn_sync_outlet.userInteractionEnabled = NO;
});

Answer 2

如果您的按钮在UIControlEventTouchUpInside上向目标发送消息，那么您仍然可以在按钮被禁用之前触摸它，并在禁用后触摸它并且它仍然会向其目标发送消息。

尝试使用此功能停止接收触摸事件：

- (void)removeTarget:(id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents

显然，当您重新启用按钮时，您将要再次添加目标。

Answer 3

感谢您的建议。当我添加延迟启用后，它工作正常：

[self performSelector:@selector(enableNow) withObject:nil afterDelay:1.0];

如何阻止禁用的UI按钮执行单击操作

3 个答案: