Ios 使用委托从UIView子类向UIViewController发送数据
我有一个IBOutlet连接到视图控制器(Ios 使用委托从UIView子类向UIViewController发送数据,ios,swift,uiview,uiviewcontroller,swift3,Ios,Swift,Uiview,Uiviewcontroller,Swift3,我有一个IBOutlet连接到视图控制器(UIViewController)视图上方的UIView对象(内部视图)。我想让用户用手指旋转innerView。因此,我将UIView的子类(TouchView)设置为innerView的类。当用户旋转视图对象时,我希望视图控制器从TouchView接收一个值。我有以下几点 // UIView protocol TouchDelegate: class { func degreeChanged(degree: Double) } class
UIViewController
)视图上方的UIView
对象(内部视图)。我想让用户用手指旋转innerView。因此,我将UIView
的子类(TouchView)设置为innerView的类。当用户旋转视图对象时,我希望视图控制器从TouchView接收一个值。我有以下几点
// UIView
protocol TouchDelegate: class {
func degreeChanged(degree: Double)
}
class TouchView: UIView {
weak var delegate: TouchDelegate? = nil
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
let aTouch: AnyObject = touches.first! as UITouch
let newLoc = aTouch.location(in: self.superview)
...
...
let degree = { (radians: Double) -> Double in
return radians * 180 / M_PI
}
self.delegate?.degreeChanged(degree: degree)
}
}
// UIViewController
class ViewController: UIViewController, TouchDelegate {
@IBOutlet weak var innerView: UIView!
// MARK: - View
override func viewDidLoad() {
super.viewDidLoad()
let touchView = TouchView()
touchView.delegate = self
}
// MARK: - From TouchView
func degreeChanged(degree: Double) {
print(degree) // <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< no call
}
}
//UIView
协议代理:类{
功能度更改(度:双)
}
类TouchView:UIView{
弱变量委托:TouchDelegate?=nil
覆盖功能触摸移动(touchs:Set,带有事件:UIEvent?){
让aTouch:AnyObject=touch.first!作为UITouch
让newLoc=aTouch.location(在:self.superview中)
...
...
设阶={(弧度:双)->双精度
返回弧度*180/M_PI
}
自我授权?.degree更改(学位:学位)
}
}
//UIViewController
类ViewController:UIViewController、TouchDelegate{
@IBVAR内部视图:UIView!
//马克:-视图
重写func viewDidLoad(){
super.viewDidLoad()
让touchView=touchView()
touchView.delegate=self
}
//马克:-来自TouchView
功能度更改(度:双){
打印(学位)/我发现两个问题
您创建了touchView的新实例,但未将其添加到视图控制器的视图中
您的innerView不是touchView的实例,并且未设置其委托
我对你的处境的看法如下:
// UIViewController
class ViewController: UIViewController, TouchDelegate {
@IBOutlet weak var innerView: TouchView!
// MARK: - View
override func viewDidLoad() {
super.viewDidLoad()
innerView.delegate = self
}
// MARK: - From TouchView
func degreeChanged(degree: Double) {
print(degree) // <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< no call
}
}
//UIViewController
类ViewController:UIViewController、TouchDelegate{
@IBVAR内部视图:TouchView!
//马克:-视图
重写func viewDidLoad(){
super.viewDidLoad()
innerView.delegate=self
}
//马克:-来自TouchView
功能度更改(度:双){
打印(学位)//太好了!谢谢。