我是一名新的iOS程序员。现在我正在创建一个样例应用,不使用
以下是我在
问题在于,在
在这里,
storyboard
,而是实现了垂直滚动方向的主类UICollectionView
。特定的单元格中,我添加了另一个水平方向的UICollectionView
。问题是,单元格中水平方向的滚动不能将我点击的内容推到另一个视图控制器中。以下是我在
AppDelegate
中设置的rootViewController
。window = UIWindow(frame: UIScreen.main.bounds)
window?.makeKeyAndVisible()
let navigation = UINavigationController(rootViewController: CategoryController())
window?.rootViewController = navigation
这里是我实现tableView
的CategoryController
。
tableView.register(TableCell.self, forCellReuseIdentifier: cellId)
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 5
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath)
return cell
}
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 120
}
当我点击特定单元格时,tableView
可以很好地工作,当我想要导航到特定控制器时。
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print(indexPath.item)
let view = DetailEachCellController()
navigationController?.pushViewController(view, animated: true)
}
问题在于,在
DetailEachCellController
中,我使用了UICollectionView
来列出一些数据,但是当我点击特定的单元格时,它不会导航到新的控制器。在这里,
DetailEachCellController
是一个UIViewController
。var collectionDetailView: UICollectionView!
collectionDetailView.register(DetailContactCell.self, forCellWithReuseIdentifier: cellIdContact)
collectionDetailView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: cellIdContent)
func setupCollectionView() {
collectionDetailView.topAnchor.constraint(equalTo: detailContent.topAnchor).isActive = true
collectionDetailView.widthAnchor.constraint(equalTo: detailContent.widthAnchor).isActive = true
collectionDetailView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
collectionDetailView.backgroundColor = .white
}
func callAction() {
print("pushing view")
let view = UIViewController()
self.navigationController?.pushViewController(view, animated: true)
}
这里是 UICollectionViewFlowLayout
的代理。
extension DetailEachCellController : UICollectionViewDelegateFlowLayout, UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 2
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.item == 0 {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellIdContact, for: indexPath)
return cell
}
else {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellIdContent, for: indexPath)
cell.backgroundColor = .blue
return cell
}
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
if indexPath.item == 1 {
return CGSize(width: view.frame.width, height: 250)
}
return CGSize(width: view.frame.width, height: 120)
}
}
这里是DetailContactCell
,我添加了一些按钮供用户点击,并且可以进入下一个视图,但是它没有移动,尽管函数已被调用。
class DetailContactCell: UICollectionViewCell {
var eachCellController: DetailEachCellController?
lazy var callButton: UIButton = {
let button = UIButton()
button.translatesAutoresizingMaskIntoConstraints = false
button.layer.shadowOpacity = 0.25
button.backgroundColor = .white
button.setTitle("CALL", for: .normal)
button.layer.cornerRadius = 10
button.layer.shadowOffset = CGSize(width: 0, height: 10)
button.layer.shadowRadius = 10
return button
}()
lazy var bookButton: UIButton = {
let button = UIButton()
button.translatesAutoresizingMaskIntoConstraints = false
button.layer.shadowOpacity = 0.25
button.backgroundColor = .white
button.layer.cornerRadius = 10
button.layer.shadowOffset = CGSize(width: 0, height: 10)
button.layer.shadowRadius = 10
return button
}()
override init(frame: CGRect) {
super.init(frame: frame)
addSubview(callButton)
addSubview(bookButton)
callButton.centerYAnchor.constraint(equalTo: self.centerYAnchor).isActive = true
callButton.leftAnchor.constraint(equalTo: self.leftAnchor, constant: 15).isActive = true
callButton.widthAnchor.constraint(equalTo: self.widthAnchor, multiplier: 1/2.5).isActive = true
callButton.heightAnchor.constraint(equalToConstant: 60).isActive = true
bookButton.centerYAnchor.constraint(equalTo: self.centerYAnchor).isActive = true
bookButton.rightAnchor.constraint(equalTo: self.rightAnchor, constant: -15).isActive = true
bookButton.widthAnchor.constraint(equalTo: self.widthAnchor, multiplier: 1/2.5).isActive = true
bookButton.heightAnchor.constraint(equalToConstant: 60).isActive = true
self.actionButton()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func actionButton() {
callButton.addTarget(self, action: #selector(callBtn), for: .touchUpInside)
}
@objc func callBtn() {
print("calling")
eachCellController = DetailEachCellController()
eachCellController?.callAction()
}
}
UICollectionView
的UIViewController
的强实例传递给UICollectionViewCell
对象是不好的。这会导致保留循环漏洞。委托模式和处理程序是为这种情况而设计的。 - Malloc