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[英]Using Swift, how do I call a function coded in one view controller from a button in another view controller?
[英]How do I get the Segmented Control index from one view controller to another containerview controller in Swift iOS development?
我在命名为仪表板控制器的视图控制器之一中使用三个索引分段控件,并将segue传递到容器视图以在仪表板控制器中加载三个不同的视图控制器,但所选索引仍显示分段控件,但容器视图正在加载仪表板控制器下的默认第一视图控制器。
这是我的方法。
func switchViews(_ sender: Any?) {
// vcSelector is an instance variable, or you can use the sender
let subVCIndex = vcSelector?.selectedSegmentIndex
// also an instance variable
currentViewController = nil
switch subVCIndex {
case 0:
currentViewController = self.storyboard!.instantiateViewController(withIdentifier: "SubControllerA")
// set up for case 0
case 1:
currentViewController = self.storyboard!.instantiateViewController(withIdentifier: "SubControllerB")
// set up for case 1
// ...
default:
// should never happen
NSLog("*** Invalid view mode! ***")
return // bail out
}
// add the new view controller
self.addChildViewController(currentViewController!)
// take out all the old subviews
for subview in self.containerView!.subviews {
subview.removeFromSuperview()
}
// install the new subVC's view
self.containerView?.addSubview(currentViewController!.view)
currentViewController!.view.frame = self.containerView!.bounds
}
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