用点击手势关闭 SVProgressHUD

Question

我需要将 UITapGestureRecognizer 添加到 SVProgressHUD。 SVProgressHUD 已经可以使用-(void) dismiss; 关闭。用于此的代码将基于秒关闭动画。

- (void)dismiss {
for (UIGestureRecognizer *gesture in [[[self class] sharedView] gestureRecognizers]) {
    [[[self class] sharedView] removeGestureRecognizer:gesture];
}

NSDictionary *userInfo = [self notificationUserInfo];
[[NSNotificationCenter defaultCenter] postNotificationName:SVProgressHUDWillDisappearNotification
                                                    object:nil
                                                  userInfo:userInfo];

self.activityCount = 0;
[UIView animateWithDuration:0.15
                      delay:0
                    options:UIViewAnimationCurveEaseIn | UIViewAnimationOptionAllowUserInteraction
                 animations:^{
                     self.hudView.transform = CGAffineTransformScale(self.hudView.transform, 0.8, 0.8);
                     if(self.isClear) // handle iOS 7 UIToolbar not answer well to hierarchy opacity change
                         self.hudView.alpha = 0;
                     else
                         self.alpha = 0;
                 }
                 completion:^(BOOL finished){
                     if(self.alpha == 0 || self.hudView.alpha == 0) {
                         self.alpha = 0;
                         self.hudView.alpha = 0;

                         [[NSNotificationCenter defaultCenter] removeObserver:self];
                         [self cancelRingLayerAnimation];
                         [self addTapGestureToDismiss];
                         [_hudView removeFromSuperview];
                         _hudView = nil;

                         [_overlayView removeFromSuperview];
                         _overlayView = nil;

                         [_indefiniteAnimatedView removeFromSuperview];
                         _indefiniteAnimatedView = nil;


                         UIAccessibilityPostNotification(UIAccessibilityScreenChangedNotification, nil);

                         [[NSNotificationCenter defaultCenter] postNotificationName:SVProgressHUDDidDisappearNotification
                                                                             object:nil
                                                                           userInfo:userInfo];

                         // Tell the rootViewController to update the StatusBar appearance
                         UIViewController *rootController = [[UIApplication sharedApplication] keyWindow].rootViewController;
                         if ([rootController respondsToSelector:@selector(setNeedsStatusBarAppearanceUpdate)]) {
                             [rootController setNeedsStatusBarAppearanceUpdate];
                         }
                         // uncomment to make sure UIWindow is gone from app.windows
                         //NSLog(@"%@", [UIApplication sharedApplication].windows);
                         //NSLog(@"keyWindow = %@", [UIApplication sharedApplication].keyWindow);
                     }
                 }];

}

我的想法是把 tapGesture 代码添加到dismiss方法中。这是我到目前为止所写的。

- (void)addTapGestureToDismiss {

// Creation and initializer of the tap gesture
UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc]
                                         initWithTarget:self action:@selector(dismiss)];

// Specify that the gesture must be a single tap
tapRecognizer.numberOfTapsRequired = 1;

// Add the tap gesture recognizer to the view
[[[self class] sharedView] addGestureRecognizer:tapRecognizer];

}

如您所见，我只是在初始化 tapGesture。我遇到了将其放置在几个地方并导致应用程序只有一次点击的问题。在这个过程中，我几乎把自己弄糊涂了。我应该

• 将此手势添加到视图中？
• 添加此手势以关闭？

Answer 1

基于 Z.Hung 的回答，您可以在 SVProgressHUD 上创建一个类别，这样您就不必在每个使用它的视图控制器中重复此代码。

用法

只需导入这个类别并调用

[SVProgressHUD showDismissableErrorWithStatus:@"Error message here"];

代码

@interface SVProgressHUD (Dismissable)

+ (void)showDismissableErrorWithStatus:(NSString*)status;

@end

@implementation SVProgressHUD (Dismissable)

+ (void)showDismissableErrorWithStatus:(NSString*)status {
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleHUDTappedNotification:) name:SVProgressHUDDidReceiveTouchEventNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleHUDDisappearedNotification:) name:SVProgressHUDWillDisappearNotification object:nil];
    [SVProgressHUD showErrorWithStatus: status];
}

#pragma mark - NSNotificationCenter

+ (void)handleHUDTappedNotification: (NSNotification *)notification {
    [SVProgressHUD dismiss];
}

+ (void)handleHUDDisappearedNotification: (NSNotification *)notification {
    [[NSNotificationCenter defaultCenter] removeObserver:self name:SVProgressHUDDidReceiveTouchEventNotification object:nil];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:SVProgressHUDWillDisappearNotification object:nil];

}

@end

斯威夫特 4

import SVProgressHUD

/// Ref: https://stackoverflow.com/a/41111242/425694
extension SVProgressHUD {

  public static func showDismissableError(with status: String) {
    let nc = NotificationCenter.default
    nc.addObserver(
      self, selector: #selector(hudTapped(_:)),
      name: NSNotification.Name.SVProgressHUDDidReceiveTouchEvent,
      object: nil
    )
    nc.addObserver(
      self, selector: #selector(hudDisappeared(_:)),
      name: NSNotification.Name.SVProgressHUDWillDisappear,
      object: nil
    )
    SVProgressHUD.showError(withStatus: status)
    SVProgressHUD.setDefaultMaskType(.clear)
  }

  @objc
  private static func hudTapped(_ notification: Notification) {
    SVProgressHUD.dismiss()
    SVProgressHUD.setDefaultMaskType(.none)
  }

  @objc
  private static func hudDisappeared(_ notification: Notification) {
    let nc = NotificationCenter.default
    nc.removeObserver(self, name: NSNotification.Name.SVProgressHUDDidReceiveTouchEvent, object: nil)
    nc.removeObserver(self, name: NSNotification.Name.SVProgressHUDWillDisappear, object: nil)
    SVProgressHUD.setDefaultMaskType(.none)
  }

}

Answer 2

更新 2.0

一段时间后，我偶然发现了这个解决方案并记住了这个问题，就我测试过的而言，它是有效的。只需在 ViewController 类的 viewWillAppear 中添加一个观察者。无需像我之前的答案那样修改库。

-(void)viewWillAppear:(BOOL)animated{
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(tapToDismiss:) name:SVProgressHUDDidReceiveTouchEventNotification object:nil];
    //Other initializing
}
-(void)tapToDismiss:(NSNotification *)notification{
    [SVProgressHUD dismiss];
    //maybe other code to stop whatever your progress is
}

即使您有掩码类型，这也会关闭 SVProgressHUD。

完成后使用它来移除 Observer（就像在 viewDidDisappear 中一样），否则它将在应用程序的整个生命周期中一直存在。

[[NSNotificationCenter defaultCenter] removeObserver:self name:SVProgressHUDDidReceiveTouchEventNotification object:nil];

信用：http://kevsaidwhat.blogspot.my/2013/06/cancel-svprogresshud-process-by-tapping.html

Answer 3

完整的快速实现有人可能会觉得它很有用。这是 BaseViewController

func showProgressHud(){
    SVProgressHUD.show()
    SVProgressHUD.setDefaultMaskType(.clear)
}

func hideProgressHud(){
    SVProgressHUD.dismiss()
}


//Hide progress hud on user tap on unresponsive api call

func hideProgressHudOnUserTap(){
    NotificationCenter.default.addObserver(self, selector: #selector(self.tapToDismiss(notification:)), name: NSNotification.Name.SVProgressHUDDidReceiveTouchEvent, object: nil)
}

@objc func tapToDismiss(notification: Notification) {
    hideProgressHud()
}

func removeProgressHudObserver(){
    NotificationCenter.default.removeObserver(self, name: NSNotification.Name.SVProgressHUDDidReceiveTouchEvent, object: nil)
}

然后你像这样在你的视图控制器中调用它

override func viewWillAppear(_ animated: Bool) {
    hideProgressHudOnUserTap()
}

override func viewDidDisappear(_ animated: Bool) {
    removeProgressHudObserver()
}

Answer 4

实现这一点的简单方法是：

1. 创建一个关闭 HUD 的类：

class HUDManager {
    @objc
    class func dismissHUD() {
        SVProgressHUD.dismiss()
    }
}

1. 订阅SVProgressHUDDidReceiveTouchEvent 通知：

NotificationCenter.default.addObserver(HUDManager.self,
                                       selector: #selector(HUDManager.dismissHUD),
                                       name: .SVProgressHUDDidReceiveTouchEvent,
                                       object: nil)

Answer 5

感谢@charmingToad，如果在这里回答，我想在上面发布一个更优化和功能更强大的解决方案。

在我的情况下，如果用户点击并取消，我需要知道取消操作。

import SVProgressHUD

extension SVProgressHUD {
    private static var dismissCompletion: (() -> ())?
    
    public static func showDismissable(with status: String, tapDismissed: (() -> ())? = nil) {
        dismissCompletion = tapDismissed
        
        let notificationCenter = NotificationCenter.default
        notificationCenter.addObserver(
            self, selector: #selector(hudTapped(_:)),
            name: NSNotification.Name.SVProgressHUDDidReceiveTouchEvent,
            object: nil
        )
        notificationCenter.addObserver(
            self, selector: #selector(hudDisappeared(_:)),
            name: NSNotification.Name.SVProgressHUDWillDisappear,
            object: nil
        )
        SVProgressHUD.show(withStatus: status)
        SVProgressHUD.setDefaultMaskType(.black)
    }

  @objc
  private static func hudTapped(_ notification: Notification) {
    SVProgressHUD.dismiss()
    SVProgressHUD.setDefaultMaskType(.none)
    dismissCompletion?()
  }

  @objc
  private static func hudDisappeared(_ notification: Notification) {
    dismissCompletion = nil
    let notificationCenter = NotificationCenter.default
    notificationCenter.removeObserver(self, name: NSNotification.Name.SVProgressHUDDidReceiveTouchEvent, object: nil)
    notificationCenter.removeObserver(self, name: NSNotification.Name.SVProgressHUDWillDisappear, object: nil)
    SVProgressHUD.setDefaultMaskType(.none)
  }
}