我一直在尝试在我的应用中添加一些代码,以确保先前在选择器视图中选择的行被保留,这样当用户返回到该视图时,它会显示以前选择的行。
我以为我这样做是正确的,但它似乎对我当前的代码做了什么。
这就是我所拥有的:
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
itemSelected = colours[row]
}
override func viewWillAppear(animated: Bool) {
var colourNum = 0
if itemSelected == "Moss" {
colourNum = 0
} else if itemSelected == "Ocean" {
colourNum = 1
} else if itemSelected == "Maroon" {
colourNum = 2
} else if itemSelected == "Steel" {
colourNum = 3
} else if itemSelected == "Iron" {
colourNum = 4
} else if itemSelected == "Cayenne" {
colourNum = 5
}
colourPicker.selectRow(colourNum, inComponent: 0, animated: true)
}
有什么想法吗?
答案 0 :(得分:0)
您可以使用NSUserDefaults。
NSUserDefaults.standardUserDefaults().setObject(newValue, forKey: "selectedColour")
NSUserDefaults.standardUserDefaults().synchronize()
var returnValue: [NSNumber]? = NSUserDefaults.standardUserDefaults().objectForKey("selectedColour") as? [NSNumber]