我有一个切换按钮。最初,它将处于关闭模式。因此,当我打开切换开关时,我需要将一组数据传递到集合视图。当再次关闭时,我需要将一组数据传递到集合视图。
所以这是我的代码:
@IBAction func cateSelTap(_ sender: Any) {
isChecked = !isChecked
if isChecked {
self.subsetTheCategoryListForClientLogin(isCityLogin: false)
}else {
self.subsetTheCategoryListForClientLogin(isCityLogin: true)
}
}
func subsetTheCategoryListForClientLogin(isCityLogin: Bool) {
let cityType = "city"
print("LOG:CATE1 \(self.categoryarr)")
var objectIds = [Int]()
var subsetArray = NSMutableArray()
for i in 0..<self.categoryarr.count {
let type = (self.categoryarr.object(at:i) as AnyObject).value(forKey: "type") as! String
if isCityLogin {
if type == cityType {
subsetArray.add(self.categoryarr.object(at:i) as AnyObject)
objectIds.append(i)
}
} else {
if type != cityType {
subsetArray.add(self.categoryarr.object(at:i) as AnyObject)
objectIds.append(i)
}
}
}
self.categoryarr.removeAllObjects()
self.categoryarr = subsetArray
print("LOG:CATE2 \(self.categoryarr)")
DispatchQueue.main.async{
self.categorycollection.reloadData()
// self.categorycollection.performSelector(onMainThread: #selector(self.categorycollection.reloadData), with: nil, waitUntilDone: true)
}
}
当我运行我的应用程序时,以及当我关闭应用程序时-我的收藏夹视图数据未显示确切的数据。仍然显示先前的数据。同样,当我关闭其完全空白时。
有什么帮助吗?
最佳答案
添加一个新属性,例如categoryarr
,例如categoryCollectionViewSource
并为其分配初始数据。在集合视图委托方法中使用categoryCollectionViewSource
而不是categoryarr
。并在过滤方法中
func subsetTheCategoryListForClientLogin(isCityLogin: Bool) {
let cityType = "city"
print("LOG:CATE1 \(self.categoryarr)")
var objectIds = [Int]()
var subsetArray = NSMutableArray()
for i in 0..<self.categoryarr.count {
let type = (self.categoryarr.object(at:i) as AnyObject).value(forKey: "type") as! String
if isCityLogin {
if type == cityType {
subsetArray.add(self.categoryarr.object(at:i) as AnyObject)
objectIds.append(i)
}
} else {
if type != cityType {
subsetArray.add(self.categoryarr.object(at:i) as AnyObject)
objectIds.append(i)
}
}
}
//note this line
self.categoryCollectionViewSource.removeAllObjects()
self.categoryCollectionViewSource = subsetArray
print("LOG:CATE2 \(self.categoryarr)")
DispatchQueue.main.async{
self.categorycollection.reloadData()
}
}