uibutton

问题 I've been trying to run an animation that rotates my UIButton 360 degrees using this code: UIView.animateWithDuration(3.0, animations: { self.vineTimeCapButton.transform = CGAffineTransformMakeRotation(CGFloat(M_PI*2)) self.instagramTimeCapButton.transform = CGAffineTransformMakeRotation(CGFloat(M_PI*2)) }) However, it doesn't rotate 360 degrees because the UIButton is already at that location. How can I rotate my UIButton 360 degrees? 回答1: You can use a trick: start rotating with 180 degrees

问题 I have a UIButton . It has two subviews. I then call: [createButton addTarget:self action:@selector(openComposer) forControlEvents:UIControlEventTouchUpInside]; If I tap the parts of the UIButton that aren't covered but one of its subviews, it works fine. However if I tap one of the subviews instead, it does not trigger the action. On both subviews, I has .userInteractionEnabled set to YES . Both subviews are plain UIViews s with a frame and backgroundColor . How can I get the tap to "pass

问题 I have a UIButton . It has two subviews. I then call: [createButton addTarget:self action:@selector(openComposer) forControlEvents:UIControlEventTouchUpInside]; If I tap the parts of the UIButton that aren't covered but one of its subviews, it works fine. However if I tap one of the subviews instead, it does not trigger the action. On both subviews, I has .userInteractionEnabled set to YES . Both subviews are plain UIViews s with a frame and backgroundColor . How can I get the tap to "pass

问题 On my login page, if I focus to UITextEdit for entering email and password, keyboard appears and login page scroll up. And I add this code for remove keyboard if I touch outside of keyboard. extension UIViewController { func hideKeyboardWhenTappedAround() { let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(UIViewController.dismissKeyboard)) tap.cancelsTouchesInView = false view.addGestureRecognizer(tap) } @objc func dismissKeyboard() { view.endEditing

问题 I'm writing an app for tvOS - and it all works until I put a UIButton on the screen. The problem, when buttons are added, is that touchesBegan and touchesMoved stop working. If I remove the buttons then touchesBegan and touchesMoved start working correctly again. I have tried, in the interests of experimentation, unchecking 'User Interaction Enabled' - but this didn't make any difference. I have also tried subclassing UIButton and adding the following code: - (void)touchesBegan:(NSSet *

问题 I have a horizontal paginated UIScrollView with a UIButton partially covering the scroll view. Like this: UIView | |- UIScrollView | |- UIButton I want to make the UIButton to not trigger on tap-scroll-and-relase-above-the-button (I want the UIScrollView to scroll instead). I want the button to only respond to tap-and-release-without-moving . Can this easy and quickly done? Or should I subclass the UIButton and override -touchesBegan: , etc., to manually pass the touches to the scrollView

问题 I tried to change the font color of the right bar button item to purple, but it still shows up as white. I've consulted this question and this question. How do I fix this? Code let sortButton = UIButton(frame: CGRect(x: 0, y: 0, width: 34, height: 15)) sortButton.setTitle("SORT", for: .normal) sortButton.titleLabel?.tintColor = UIColor.myMusicPurple sortButton.tintColor = UIColor.myMusicPurple navigationItem.rightBarButtonItem = UIBarButtonItem(customView: sortButton) navigationItem

问题 Can I add multiple target actions on a UIButton for the same event like below? [button addTarget:self action:@selector(xxx) forControlEvents:UIControlEventTouchUpInside]; [button addTarget:object action:@selector(yyy) forControlEvents:UIControlEventTouchUpInside]; I made a quick app to test it out and it carries out both the actions on button press. I want to know if it's good practice to do so, and also will the order of execution always remain the same? Thanks in advance. Edit: I did find

问题 I want to implement different targets in different cases to a button. If its the own profile of the current user, the button should add the target "go to settings". If its a different user, I want to add a follow/unfollow action. After checking all parameters, my code should work. But it doesn't work. I added some prints but the button is not clickable. func setupUserInformation(user: UserModel) { usernameLabel.text = user.username if user.uid == UserApi.shared.CURRENT_USER_ID { editButton

问题 I'm following Apple's guidelines for implementing the "Sign in with Apple" button. In the documentation apple says that it is also possible to use only the logo to create a custom button of "Log in with Apple), also you can also change the shape of the image to have a circular button ... In order to be able to edit the image it also provides insert a mask but I don't understand that we have to create a mask for the button or the selected image. This is what apple wrote in the documentation At