所以我有两个UITapGestureRecognizer,一个用于单击,另一个用于双击.但是,当我进行双击时,也会触发单击动作手势识别器.有没有办法禁用它,以便双击只调用双击操作？
我有两个UILabels，两个UITapGestureRecognizers在一个UITableViewCell.
cell.Username.tag = indexPath.row
cell.SharedUser.tag = indexPath.row
let tapGestureRecognizer2 = UITapGestureRecognizer(target:self, action:"GoToProfil:")
let tapGestureRecognizer3 = UITapGestureRecognizer(target:self, action:"GoToProfil:")
cell.Username.userInteractionEnabled = true
cell.Username.addGestureRecognizer(tapGestureRecognizer2)
cell.SharedUser.userInteractionEnabled = true
cell.SharedUser.addGestureRecognizer(tapGestureRecognizer3)
func GoToProfil (sender: AnyObject!) {
self.performSegueWithIdentifier("GoToProfilSegue", sender: sender)
}
我正在使用 aSegue来推送另一个UIViewController，并且我正在覆盖该PrepareSegue函数以发送与Sender标签相对应的所需信息。
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {
let ProfilView = segue.destinationViewController as! Profil
ProfilView.hidesBottomBarWhenPushed = true
ProfilView.title = posts[sender.view!.tag].User?.objectForKey("Name") as? String
ProfilView.User = posts[sender.view!.tag].User
}
我的问题是我想知道UILabel按下了哪个，知道我已经在使用tag.
complete error:
Left side of mutating operator isn't mutable: 'abc' is a 'let' constant
Happens because I am trying to change value of a variable sent by parameter to function.
Can I get rid of this, or find some other solution?
Code(My code is much complex, but in effect doing the same as this):
func generateABC() {
var abc = "this"
abc += "is"
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap(abc)) )
tapGesture.delegate = self
webView.addGestureRecognizer(tapGesture)
abc += "function"
} …我在UIView中添加了Label并创建了它的插座,然后在UITapGestureRecognizer的帮助下我添加了功能,但是当我点击或点击标签时.标签文本不会更改.我搜索了类似的问题,我得到的答案也是我写的,但标签文字仍未改变.用Swift 3.0编写的代码.这是我写的代码 -
import UIKit
class testingViewController: UIViewController {
@IBOutlet weak var testLabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
let tap:UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(showDatePicker))
tap.numberOfTouchesRequired = 1
tap.numberOfTapsRequired = 1
testLabel.addGestureRecognizer(tap)
testLabel.isUserInteractionEnabled = true// after adding this it worked
// Do any additional setup after loading the view.
}
func showDatePicker(){
print("testing")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
/*
// MARK: - Navigation
// In a storyboard-based application, …