uitapgesturerecognizer

问题 I have view hierarchy in SwiftUI like ParentView { //other views ChildView().highPriorityGesture(TapGesture().onEnded { print("Tap!") }) // other views }self.gesture(tap) And I want to have parent view handle all taps on the screen in spite of cases when user taps onto ChildView. Now both closures executes. How to stop tap gesture events propagating up view hierarchy? 回答1: Well, probably there is some specific in which exactly ChildView and ParentView , because as tested below (Xcode 11.2 /

问题 I have view hierarchy in SwiftUI like ParentView { //other views ChildView().highPriorityGesture(TapGesture().onEnded { print("Tap!") }) // other views }self.gesture(tap) And I want to have parent view handle all taps on the screen in spite of cases when user taps onto ChildView. Now both closures executes. How to stop tap gesture events propagating up view hierarchy? 回答1: Well, probably there is some specific in which exactly ChildView and ParentView , because as tested below (Xcode 11.2 /

问题 I have view hierarchy in SwiftUI like ParentView { //other views ChildView().highPriorityGesture(TapGesture().onEnded { print("Tap!") }) // other views }self.gesture(tap) And I want to have parent view handle all taps on the screen in spite of cases when user taps onto ChildView. Now both closures executes. How to stop tap gesture events propagating up view hierarchy? 回答1: Well, probably there is some specific in which exactly ChildView and ParentView , because as tested below (Xcode 11.2 /

问题 I am trying to implement a feature that draws an image at a specific point of a UIImageView. 1.) So the user makes a photo 2.) Photo gets displayed to the user in a UIImageView in "Aspect Fit" 3.) User clicks on the UIImageView to put a image at the tapped point 4.) Combined Image is displayed code: extension UIImage { func image(byDrawingImage image: UIImage, inRect rect: CGRect) -> UIImage! { UIGraphicsBeginImageContextWithOptions(size, false, 0) draw(in: CGRect(x: 0, y: 0, width: size

问题 I have the following code and want to make parts of my text be clickable and call another UIViewController (not a website). NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:@"testing it out @clickhere"]; NSInteger length = str.length; [str addAttribute:NSForegroundColorAttributeName value:[UIColor bestTextColor] range:NSMakeRange(0,length)]; The NSMutableAttributedString gets set to a UILabel like so: label.attributedText = str; Whats the best way to do this?

问题 I'm trying to get indexPath on the cell when it is tapped twice. I'm passing arguments in Selector like this but it is giving error. What is the correct format for this ? func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { if let subOptioncell : SubOptionsCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: subOptionsCVReuseIdentifier, for: indexPath) as! SubOptionsCollectionViewCell let imageNamed = "\

问题 I'm trying to get indexPath on the cell when it is tapped twice. I'm passing arguments in Selector like this but it is giving error. What is the correct format for this ? func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { if let subOptioncell : SubOptionsCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: subOptionsCVReuseIdentifier, for: indexPath) as! SubOptionsCollectionViewCell let imageNamed = "\

问题 I am having an issue setting up a UITapGestureRecognizer calling a shared class across my app. Basically I have a bunch of images that if tapped will popup another view with that image and comments. Instead of using initWithTarget using self I want to call the function from a shared class that can be loaded into each type of Navigation Controller. I am able to initialize ImageClass *imageClass = [[ImageClass alloc]init] and call the functions fine by [imageClass DoThis] however when I add it

问题 I have a strange problem when tapping a single UICell in UICollectionView and then scrolling down or up in the UICollectionView I see that more one cell is selected. The other cells that are selected that were not tapped seem to be randomly selected throughout the UICollectionView layout. I have 3 columns of cells and many rows in the UICollectionView. In my code I have the following: - (void)collectionView:(UICollectionView *)myCV didSelectItemAtIndexPath:(NSIndexPath *)indexPath { LogInfo(@

问题 I am adding a tap gesture recognizer programmatically to a custom collection view cell class. for some reason, it doesnt seem to be working. the frame is not 0, isUserInteractionEnabled is set to true and i made sure the tap view is on top of all other views: The custom cell class: let containerView: UIView = { let view = UIView() view.isUserInteractionEnabled = true view.translatesAutoresizingMaskIntoConstraints = false return view }() let tapView: UIView = { let v = UIView() v