尽管我可以在CustomView类中创建一个func setImages ()
,并在初始化myCustomView
后调用它,但我想知道是否有更干净的方法来设置视图的委托,以便在初始化时可以访问它。
我的主视图控制器包含
class Main: UIViewController, CustomViewDelegate {
var imagesArray:[UIImage] = [Image1,Image2,Image3,Image4,Image5]
var myCustomView = CustomView()
override func viewDidLoad() {
super.viewDidLoad()
myCustomView.delegate = self
myCustomView = CustomView(frame: CGRect(x: 0, y: 0, width: 0, height: 0))
//this causes init of CustomView, but delegate is now nil and button images don't load
}
}
我的CustomView文件包含
var buttonsArray = [Button1,Button2,Button3,Button4,Button5]
override init(frame: CGRect) {
super.init(frame : frame)
for n in 0..< buttonsArray.count {
buttonsArray[n].setImage(delegate?.imagesArray[n], for: .normal)
}
}
最佳答案
您可以创建一个新的初始值设定项,它接受一个框架和一个委托类型,并在将图像设置为按钮之前设置委托
init(frame: CGRect,sender: CustomViewDelegate) {
super.init(frame : frame)
self.delegate = sender
for n in 0..< buttonsArray.count {
buttonsArray[n].setImage(delegate?.imagesArray[n], for: .normal)
}
}
为此,您必须确认代理的viewController(显然)。在viewController中这样调用customView:
class ViewController: UIViewController, CustomViewDelegate {
var myCustomView: CustomView!
override func viewDidLoad() {
myCustomView = CustomView(frame: self.view.bounds, sender: self)
}
}
希望有帮助!
关于swift - 在初始化之前设置CustomView委托(delegate),我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/49023310/