Why UIButton selector is random crash instead of crash directly?
I know I should implement the Selector like arbitraryAction() instead of arbitraryAction(_ complition: (() -> Void)?).Just look the code below.If you tap the Button.The code would crash random.It makes me crazy. I just want to know why the crash is random!
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let button = UIButton.init(frame: CGRect.init(x: 100, y: 100, width: 100, height: 100))
button.backgroundColor = .red
button.addTarget(self, action: #selector(self.arbitraryAction(_:)), for: .touchUpInside)
view.addSubview(button)
}
@objc func arbitraryAction(_ complition: (() -> Void)?) {
}
}
uibutton selector
asked Nov 19 '18 at 11:19
JulesJules
16618
add a comment |
I know I should implement the Selector like arbitraryAction() instead of arbitraryAction(_ complition: (() -> Void)?).Just look the code below.If you tap the Button.The code would crash random.It makes me crazy. I just want to know why the crash is random!
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let button = UIButton.init(frame: CGRect.init(x: 100, y: 100, width: 100, height: 100))
button.backgroundColor = .red
button.addTarget(self, action: #selector(self.arbitraryAction(_:)), for: .touchUpInside)
view.addSubview(button)
}
@objc func arbitraryAction(_ complition: (() -> Void)?) {
}
}
uibutton selector
asked Nov 19 '18 at 11:19
JulesJules
16618
add a comment |
I know I should implement the Selector like arbitraryAction() instead of arbitraryAction(_ complition: (() -> Void)?).Just look the code below.If you tap the Button.The code would crash random.It makes me crazy. I just want to know why the crash is random!
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let button = UIButton.init(frame: CGRect.init(x: 100, y: 100, width: 100, height: 100))
button.backgroundColor = .red
button.addTarget(self, action: #selector(self.arbitraryAction(_:)), for: .touchUpInside)
view.addSubview(button)
}
@objc func arbitraryAction(_ complition: (() -> Void)?) {
}
}
uibutton selector
asked Nov 19 '18 at 11:19
JulesJules
16618
I know I should implement the Selector like arbitraryAction() instead of arbitraryAction(_ complition: (() -> Void)?).Just look the code below.If you tap the Button.The code would crash random.It makes me crazy. I just want to know why the crash is random!
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let button = UIButton.init(frame: CGRect.init(x: 100, y: 100, width: 100, height: 100))
button.backgroundColor = .red
button.addTarget(self, action: #selector(self.arbitraryAction(_:)), for: .touchUpInside)
view.addSubview(button)
}
@objc func arbitraryAction(_ complition: (() -> Void)?) {
}
}
uibutton selector
uibutton selector
asked Nov 19 '18 at 11:19
JulesJules
16618
asked Nov 19 '18 at 11:19
JulesJules
16618
asked Nov 19 '18 at 11:19
JulesJules
16618
asked Nov 19 '18 at 11:19
JulesJules
16618
asked Nov 19 '18 at 11:19
JulesJules
16618
16618
add a comment |
add a comment |
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