Скачать или смотреть Fixing Button's Action Doesn’t Get Triggered Unless Long Tapped in Swift

Discover how to resolve the issue of a UIButton not responding to taps in iOS when placed inside a UIScrollView. Learn the key steps to ensure your button works flawlessly with user interactions.
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Solving the Problem of UIButton Actions in UIScrollView

As developers, we occasionally encounter perplexing issues during the app development process. One such issue that has been reported by numerous iOS developers is when a UIButton does not trigger its action unless it is long-pressed. This can be particularly frustrating, especially when working with buttons designed for immediate interactions like the "Sign in with Apple" button.

In this article, we'll dive into the issue, explore its causes, and provide a straightforward solution to get your button responding to taps as expected.

The Problem: Button Action Not Triggering

A developer faced an issue where their Sign in with Apple button, when added to a UIScrollView, only responded to long presses instead of typical taps. The developer provided the code snippet where the button was set up and shared that it worked perfectly when placed directly in the controller's view but not within the scroll view.

Code Snippet:

[[See Video to Reveal this Text or Code Snippet]]

Despite the straightforward setup, tapping the button triggered no action responses without a long press, which begs the question: what could be the root cause of this peculiar behavior?

Diagnosing the Issue

Through investigation, the developer discovered that the underlying problem was related to gestures on the scroll view itself. Specifically, they had added a tap gesture recognizer to the scroll view to dismiss the keyboard when tapping anywhere on the view.

Here's a Summary of the Findings:

The button worked fine when not within the scroll view.

A tap gesture added to the scroll view was blocking normal button tap recognition.

Action of the button was being triggered only through long press, likely due to gesture conflicts.

The Solution: Modify Gesture Recognizers

To resolve the issue, the developer removed or modified the tap gesture recognizer that was interfering with the button's touch events. Here's how you can manage gesture recognizers effectively to prevent such conflicts:

Steps to Fix the Issue:

Identify and Modify the Tap Gesture Recognizer:

Check the gesture recognizers applied to your scroll view.

If a tap gesture is present, consider evaluating its requirements, such as checking the location of touch events to avoid intercepting valid button taps.

Remove the Gesture Recognizer if Not Essential:

If the tap gesture is solely for dismissing the keyboard, consider alternatives, like dismissing it when tapping outside the text fields only.

Test Your Button Again:

After making adjustments, retest your Sign in with Apple button to confirm that it now responds to taps as intended.

Sample Code to Set Up a Tap Gesture Safely:

[[See Video to Reveal this Text or Code Snippet]]

By setting cancelsTouchesInView to false, the tap gesture recognizer won't block the button taps, allowing both interactions to coexist.

Conclusion

Button actions not being triggered correctly can be a frustrating experience for any iOS developer. By understanding the interaction between gestures and UI components within a UIScrollView, and knowing how to properly manage them, you can avoid such issues.

If you find that your button only responds to long presses, don't forget to investigate any gesture recognizers you may have added—it may just be the culprit!

Feel free to share your experiences or additional strategies for tackling similar issues. Happy coding!