UITapGestureRecognizer 错误
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【中文标题】UITapGestureRecognizer 错误【英文标题】:UITapGestureRecognizer Error 【发布时间】:2017-04-21 00:04:03 【问题描述】:我已经为这个问题苦苦挣扎了几个小时。我似乎无法理解使用 UITapGestureRecognizer 的过程。任何帮助将不胜感激。
@IBOutlet weak var textView: UITextView!
override func viewDidLoad()
let textInView = "This is my text."
textView.text = textInView
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(tapResponse(_:)))
tapGesture.numberOfTapsRequired = 1
textView.addGestureRecognizer(tapGesture)
func tapResponse(sender: UITapGestureRecognizer)
var location: CGPoint = sender.location(in: textView)
location.x = textView.textContainerInset.left
location.y = textView.textContainerInset.top
print(location.x)
print(location.y)
【问题讨论】:
【参考方案1】:您在函数 (viewDidLoad
) 中有一个函数 (tapResponse
)。
把它放在viewDidLoad
之外。然后像这样引用它:
override func viewDidLoad()
super.viewDidLoad() // Remember to always call super.
let tapGesture = UITapGestureRecognizer(
target: self,
action: #selector(ViewController.tapResponse(sender:)) // Referencing.
)
tapGesture.numberOfTapsRequired = 1
textView.addGestureRecognizer(tapGesture)
// tapResponse is now outside of viewDidLoad:
func tapResponse(sender: UITapGestureRecognizer)
var location: CGPoint = sender.location(in: imageView)
location.x = textView.textContainerInset.left
location.y = textView.textContainerInset.top
print(location.x)
print(location.y)
完成:
【讨论】:
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