我在HomePageViewController中創建了uiSegmentedControl。分段控制有兩個項目。當我選擇第一項時,我使用displayContentController方法在HomePageViewController中將sensorItemViewController內容添加爲子視圖。當點擊第二項時,我想訪問SensorTabItemViewController類的方法,它的名稱是來自HomePageViewConroller的reloadMyTableView。我從sensorItemVC訪問,但我得到「意外地發現零,而解包可選值」異常。如何正確訪問HomePageViewControler的SensorItemTabViewController?謝謝大家響應如何從swift中正確訪問其他控制器中的一個控制器變量和方法?
HomePageViewController.swift:
let segmentedControlItems = ["Table", "RefreshTableView"]
var viewControllerArray: Array<UIViewController> = []
var segmentedControl : UISegmentedControl!
var sensorItemVC: SensorTabItemViewController!
class HomePageViewController: UIViewController,UIScrollViewDelegate {
override func viewDidLoad() {
super.viewDidLoad()
segmentedControl=UISegmentedControl(items: segmentedControlItems)
segmentedControl.selectedSegmentIndex=0
segmentedControl.tintColor=myKeys.darkBlueColor
segmentedControl.layer.cornerRadius = 0.0;
segmentedControl.layer.borderWidth = 1.5
segmentedControl.frame=CGRectMake(0, frameHeight/2, frameWidth, 35)
segmentedControl.addTarget(self, action: "changeSegmentedControlItem", forControlEvents: .ValueChanged)
self.view.addSubview(segmentedControl)
let sensorItemViewController = self.storyboard!.instantiateViewControllerWithIdentifier("sensorTabItemViewController")
viewControllerArray.append(sensorItemViewController)
}
func changeSegmentedControlItem(){
print(segmentedControl.selectedSegmentIndex)
if(segmentedControl.selectedSegmentIndex==0){
displayContentController(viewControllerArray[0])
}
else{
sensorItemVC.reloadMyTableView("Temp value", light: "Light value", noise: "noise Value", motion: "motion Value")
}
}
func displayContentController (content:UIViewController) {
self.addChildViewController(content)
print(self.segmentedControl.frame.height)
content.view.frame=CGRectMake(0, self.frameHeight/2+self.segmentedControl.frame.height, self.frameWidth,
self.frameHeight-(segmentedControl.frame.height*2+self.frameHeight/2))
self.view.addSubview(content.view)
content.didMoveToParentViewController(self)
}
}
SensorTabItemViewController。 swift如下:
class SensorTabItemViewController: UIViewController,UITableViewDataSource,UITableViewDelegate {
@IBOutlet weak var tableView: UITableView!
let sensorName=["Sıcaklık Sensörü","Işık Sensörü","Gürültü Sensörü","Hareket Sensörü"]
var sensorDetails=["","","",""]
var sensorImages: Array<UIImage> = []
override func viewDidLoad() {
super.viewDidLoad()
print("sensorTab")
let tempImg=UIImage(named: "temp_ic") as UIImage?
let lightImg=UIImage(named: "light_ic") as UIImage?
let noiseImg=UIImage(named: "noise_ic") as UIImage?
let motionImg=UIImage(named: "motion_ic") as UIImage?
sensorImages.append(tempImg!)
sensorImages.append(lightImg!)
sensorImages.append(noiseImg!)
sensorImages.append(motionImg!)
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func reloadTableView(){
sensorDetails=[]
sensorDetails.append(temp)
sensorDetails.append(light)
sensorDetails.append(noise)
sensorDetails.append(motion)
tableView.reloadData()
}
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return sensorName.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("sensorCell", forIndexPath: indexPath) as UITableViewCell
cell.textLabel?.text=sensorName[indexPath.row]
cell.imageView?.image=sensorImages[indexPath.row]
cell.detailTextLabel?.text=sensorDetails[indexPath.row]
return cell
}
}
更換如何這些控制器顯示?我看到你聲明'sensorItemVC' var,但你永遠不會分配它。 – kelin
我該如何分配? – yonder
使用assign操作符,在大多數語言中調用'=',包括swift。 – SmokeDispenser