Ios 将点击手势添加到任何视图都不会触发任何动作
在我的iOS开发之旅中,我正在处理一个迄今为止最令人沮丧的问题。我本来想在我的Ios 将点击手势添加到任何视图都不会触发任何动作,ios,swift,swift3,uikit,uitapgesturerecognizer,Ios,Swift,Swift3,Uikit,Uitapgesturerecognizer,在我的iOS开发之旅中,我正在处理一个迄今为止最令人沮丧的问题。我本来想在我的UIImage视图中添加一个手势识别器,但没有成功。我在堆栈上做了一些搜索,发现我没有设置imageView.isUserInteractionEnabled=true,我认为这可以解决我的问题,但它没有。于是我开始在所有东西中添加手势识别器,包括imageView的父视图,但仍然一无所获。我确信我正在做/没有做的事情很简单,但我完全错过了。请帮忙 ProfileViewController: UIViewContro
UIImage
视图中添加一个手势识别器,但没有成功。我在堆栈上做了一些搜索,发现我没有设置imageView.isUserInteractionEnabled=true
,我认为这可以解决我的问题,但它没有。于是我开始在所有东西中添加手势识别器,包括imageView
的父视图,但仍然一无所获。我确信我正在做/没有做的事情很简单,但我完全错过了。请帮忙
ProfileViewController: UIViewController {
// User's info container (Parent iof imageView)
let userInfoContainer: UIView = {
let head = UIView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
head.backgroundColor = UIColor.white
head.translatesAutoresizingMaskIntoConstraints = false
head.layer.borderWidth = 1
print(head.isUserInteractionEnabled) // Returns true
let tap = UITapGestureRecognizer(target: self, action: #selector(tapped))
head.addGestureRecognizer(tap)
return head
}()
// Users name
let userName: UITextField = {
let name = UITextField()
name.text = "John Doe"
name.translatesAutoresizingMaskIntoConstraints = false
name.isUserInteractionEnabled = true
let tap = UITapGestureRecognizer(target: self, action: #selector(tapped))
name.addGestureRecognizer(tap)
return name
}()
// User's profile image
let profileImageView: UIImageView = {
let imageView = UIImageView(image: #imageLiteral(resourceName: "avatar"))
imageView.layer.cornerRadius = 50
imageView.layer.masksToBounds = true
imageView.translatesAutoresizingMaskIntoConstraints = false
imageView.isUserInteractionEnabled = true
imageView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(tapped)))
return imageView
}()
//
//
// skipping other UI elements
//
//
override func viewDidLoad() {
super.viewDidLoad()
// Authentication bits
self.title = "Profile View"
self.view.backgroundColor = UIColor.white
self.view.addSubview(userInfoContainer)
self.view.addSubview(profileImageView)
self.view.addSubview(userName)
} // end viewDidLoad
func tapped() {
print(123)
}
// setup constraints
func setupUserInfoContainer() {
userInfoContainer.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
userInfoContainer.widthAnchor.constraint(equalTo: view.widthAnchor).isActive = true
userInfoContainer.heightAnchor.constraint(equalToConstant: 200).isActive = true
}
// profile image arrangement
func setupProfileImage() {
profileImageView.leftAnchor.constraint(equalTo: userInfoContainer.leftAnchor, constant: 20).isActive = true
profileImageView.centerYAnchor.constraint(equalTo: userInfoContainer.centerYAnchor).isActive = true
profileImageView.heightAnchor.constraint(equalToConstant: 100).isActive = true
profileImageView.widthAnchor.constraint(equalToConstant: 100).isActive = true
}
func setupLabels() {
userName.leftAnchor.constraint(equalTo: profileImageView.rightAnchor, constant: 20).isActive = true
userName.centerYAnchor.constraint(equalTo: profileImageView.centerYAnchor).isActive = true
userName.heightAnchor.constraint(equalToConstant: 20).isActive = true
userName.isEnabled = false
}
} // end view controller
渲染视图:
视图层次结构
可能不需要的额外信息:ProfileViewController由UITabBarController处理,但从我所看到的情况来看,这不会有什么区别
更新
环顾四周,它看起来像是合适的swift 3语法
让tap=uitappesturerecognizer(目标:self,动作:#选择器(self.tapped(:))
但是我认为在闭包中有那一行是导致抛出此错误的原因。。/ProfileViewController.swift:37:74:type的值“(NSObject)->()->ProfileViewController”没有成员“tapped”
如果有人能解释我如何解决这一问题,那将是一件大事。问题是你没有将委托设置为点击手势。检查
希望这能起作用我不相信你能以这种方式分配手势识别器
1 let profileImageView: UIImageView = {
2 let imageView = UIImageView(image: #imageLiteral(resourceName: "avatar"))
3 imageView.layer.cornerRadius = 50
4 imageView.layer.masksToBounds = true
5 imageView.translatesAutoresizingMaskIntoConstraints = false
6 imageView.isUserInteractionEnabled = true
7 imageView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(tapped)))
8 return imageView
9 }()
在第7行,什么是self
?它是返回UIImageView
的函数
您的func tapped()
不是该函数的一部分。。。它属于ProfileViewController
你也许能找到一种改变目标的方法,但几分钟的尝试并没有给我带来任何运气
我认为您需要在
ProfileViewController/viewDidLoad()
(或该类中的其他地方)中创建并添加手势识别器。为什么不在类的顶部初始化图像视图,如
let profileImageView = UIImageView()
并创建一个函数来配置imageview,并将其添加为子视图,如在view中加载。这应该行得通
func configureImageView() {
#add methods and customize image view
#add image view to sub view
}
那是行不通的。从闭包内部添加
tap.delegate=self
尝试设置UIgestureRecognitizerDelegate?=ProfileViewController
您可以尝试将点击的签名更改为点击的(u发送者:任意)并在选择器中将其更改为点击的(u:)?我更改了签名,但仍然收到上面列出的错误@ConnorGCheck如果用户交互已启用viewcontoller的view或使用view调试器进行检查,则该视图上可能存在背景清晰的内容self.view.isUserInteractionEnabled
返回true@TikoAhhh,因此self在上下文中引用UIImageView而不是ProfileViewController。将该线拉入viewDidLoad会更改对视图控制器的引用。我理解正确吗?是的。。。在你的上下文中,self甚至不是UIImageView。。。它是返回UIImageView的函数。另一部分,是的。。。内部viewDidLoad“self”将指的是ViewController。