快速创建滑出菜单时遇到一个奇怪的问题，
我正在使用 AKSwiftSlideMenu 作为参考构建菜单，
这只发生在具有 UITableViewDataSource、UITableViewDelegate 的 ViewController 上。
如果我没有一个就去其他视图控制器，菜单会显示得很好。
下面是我的 BaseViewController 代码
class BaseViewController: UIViewController, SlideMenuDelegate {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func slideMenuItemSelectedAtIndex(_ index: Int32) {
let topViewController : UIViewController = self.navigationController!.topViewController!
print("View Controller is : \(topViewController) \n", terminator: "")
switch(index){
case 0:
print("Locations\n", terminator: "")
self.openViewControllerBasedOnIdentifier("Locations")
break
case 1:
print("Offers\n", terminator: "")
self.openViewControllerBasedOnIdentifier("Offers")
break
case 2:
print("Feedback\n", terminator: "")
self.openViewControllerBasedOnIdentifier("Feedback")
break
case 3:
print("About\n", terminator: "")
self.openViewControllerBasedOnIdentifier("About")
break
case 4:
for key in UserDefaults.standard.dictionaryRepresentation().keys {
UserDefaults.standard.removeObject(forKey: key)
}
//fb logout
if(FBSDKAccessToken.current() != nil) {
FBSDKAccessToken.setCurrent(nil)
FBSDKProfile.setCurrent(nil)
}
self.openViewControllerBasedOnIdentifier("SocialLogin")
default:
print("default\n", terminator: "")
}
}
func openViewControllerBasedOnIdentifier(_ strIdentifier:String){
let destViewController : UIViewController = self.storyboard!.instantiateViewController(withIdentifier: strIdentifier)
let topViewController : UIViewController = self.navigationController!.topViewController!
if (topViewController.restorationIdentifier! == destViewController.restorationIdentifier!){
print("Same VC")
} else {
self.navigationController!.pushViewController(destViewController, animated: true)
}
}
func addSlideMenuButton(){
let btnShowMenu = UIButton(type: UIButtonType.system)
btnShowMenu.setImage(self.defaultMenuImage(), for: UIControlState())
btnShowMenu.frame = CGRect(x: 0, y: 0, width: 30, height: 30)
btnShowMenu.addTarget(self, action: #selector(BaseViewController.onSlideMenuButtonPressed(_:)), for: UIControlEvents.touchUpInside)
let customBarItem = UIBarButtonItem(customView: btnShowMenu)
self.navigationItem.leftBarButtonItem = customBarItem;
}
func defaultMenuImage() -> UIImage {
var defaultMenuImage = UIImage()
UIGraphicsBeginImageContextWithOptions(CGSize(width: 30, height: 22), false, 0.0)
UIColor.black.setFill()
UIBezierPath(rect: CGRect(x: 0, y: 3, width: 30, height: 1)).fill()
UIBezierPath(rect: CGRect(x: 0, y: 10, width: 30, height: 1)).fill()
UIBezierPath(rect: CGRect(x: 0, y: 17, width: 30, height: 1)).fill()
UIColor.white.setFill()
UIBezierPath(rect: CGRect(x: 0, y: 4, width: 30, height: 1)).fill()
UIBezierPath(rect: CGRect(x: 0, y: 11, width: 30, height: 1)).fill()
UIBezierPath(rect: CGRect(x: 0, y: 18, width: 30, height: 1)).fill()
defaultMenuImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
return defaultMenuImage;
}
func onSlideMenuButtonPressed(_ sender : UIButton){
if (sender.tag == 10)
{
// To Hide Menu If it already there
self.slideMenuItemSelectedAtIndex(-1);
sender.tag = 0;
let viewMenuBack : UIView = view.subviews.last!
UIView.animate(withDuration: 0.3, animations: { () -> Void in
var frameMenu : CGRect = viewMenuBack.frame
frameMenu.origin.x = -1 * UIScreen.main.bounds.size.width
viewMenuBack.frame = frameMenu
viewMenuBack.layoutIfNeeded()
viewMenuBack.backgroundColor = UIColor.clear
}, completion: { (finished) -> Void in
viewMenuBack.removeFromSuperview()
})
return
}
sender.isEnabled = false
sender.tag = 10
let menuVC : MenuViewController = self.storyboard!.instantiateViewController(withIdentifier: "MenuViewController") as! MenuViewController
menuVC.btnMenu = sender
menuVC.delegate = self
self.view.addSubview(menuVC.view)
self.addChildViewController(menuVC)
menuVC.view.layoutIfNeeded()
menuVC.view.frame=CGRect(x: 0 - UIScreen.main.bounds.size.width, y: 0, width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height);
UIView.animate(withDuration: 0.3, animations: { () -> Void in
menuVC.view.frame=CGRect(x: 0, y: 0, width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height);
sender.isEnabled = true
}, completion:nil)
}
}
菜单视图控制器
protocol SlideMenuDelegate {
func slideMenuItemSelectedAtIndex(_ index : Int32)
}
class MenuViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
/**
* Array to display menu options
*/
@IBOutlet var tblMenuOptions : UITableView!
/**
* Transparent button to hide menu
*/
@IBOutlet var btnCloseMenuOverlay : UIButton!
/**
* Array containing menu options
*/
var arrayMenuOptions = [Dictionary<String,String>]()
/**
* Menu button which was tapped to display the menu
*/
var btnMenu : UIButton!
/**
* Delegate of the MenuVC
*/
var delegate : SlideMenuDelegate?
override func viewDidLoad() {
super.viewDidLoad()
tblMenuOptions.tableFooterView = UIView()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
updateArrayMenuOptions()
}
func updateArrayMenuOptions(){
arrayMenuOptions.append(["title":"Locations", "icon":"LocationIcon"])
arrayMenuOptions.append(["title":"Offers", "icon":"OffersIcon"])
arrayMenuOptions.append(["title":"Feedback", "icon":"FeedbackIcon"])
arrayMenuOptions.append(["title":"About", "icon":"AboutIcon"])
arrayMenuOptions.append(["title":"Logout", "icon":"LogoutIcon"])
tblMenuOptions.reloadData()
}
@IBAction func onCloseMenuClick(_ button:UIButton!){
btnMenu.tag = 0
if (self.delegate != nil) {
var index = Int32(button.tag)
if(button == self.btnCloseMenuOverlay){
index = -1
}
delegate?.slideMenuItemSelectedAtIndex(index)
}
UIView.animate(withDuration: 0.3, animations: { () -> Void in
self.view.frame = CGRect(x: -UIScreen.main.bounds.size.width, y: 0, width: UIScreen.main.bounds.size.width,height: UIScreen.main.bounds.size.height)
self.view.layoutIfNeeded()
self.view.backgroundColor = UIColor.clear
}, completion: { (finished) -> Void in
self.view.removeFromSuperview()
self.removeFromParentViewController()
})
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell : UITableViewCell = tableView.dequeueReusableCell(withIdentifier: "cellMenu")!
cell.selectionStyle = UITableViewCellSelectionStyle.none
cell.layoutMargins = UIEdgeInsets.zero
cell.preservesSuperviewLayoutMargins = false
cell.backgroundColor = UIColor.clear
let lblTitle : UILabel = cell.contentView.viewWithTag(101) as! UILabel
let imgIcon : UIImageView = cell.contentView.viewWithTag(100) as! UIImageView
imgIcon.image = UIImage(named: arrayMenuOptions[indexPath.row]["icon"]!)
lblTitle.text = arrayMenuOptions[indexPath.row]["title"]!
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let btn = UIButton(type: UIButtonType.custom)
btn.tag = indexPath.row
self.onCloseMenuClick(btn)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return arrayMenuOptions.count
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1;
}
}
发生这种情况的视图控制器示例
class LocationViewController: BaseViewController, CLLocationManagerDelegate, UITableViewDataSource, UITableViewDelegate {
var locItems:Array<LocItems>?
var locItemsWrapper:LocItemsWrapper?
var isLoadingLocItems = false
private var tb: UITableView?
override func viewDidLoad() {
super.viewDidLoad()
//set up tableview
tb = UITableView()
//Set button to open up menu
self.addSlideMenuButton()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if (self.locItems == nil) {
return 0
}
return self.locItems!.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "locCell", for: indexPath) as! LocItemCell
if(self.locItems != nil && self.locItems!.count >= indexPath.row) {
let locItem = self.locItems![indexPath.row]
let rowsLoaded = self.locItems!.count
if (!self.isLoadingLocItems && (indexPath.row >= (rowsLoaded - rowsToLoadFromBottom))) {
let totalRows = self.locItemsWrapper!.count!
let remainingLocItemsToLoad = totalRows - rowsLoaded
if(remainingLocItemsToLoad > 0) {
self.loadMoreLocItems()
}
}
}
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if(self.locItems!.count >= indexPath.row) {
selectedLocId = self.locItems![indexPath.row].id!
selectedLocBg = self.locItems![indexPath.row].locationBackground!
//TODO: Set up Switch on api call
let parameters = [
"locId": selectedLocId
]
}
}
override func prepare(for segue: (UIStoryboardSegue!), sender: Any!) {
if(segue.identifier == "showCongratOffer") {
let svc = segue.destination as! CongratOfferViewController
svc.offerId = selectedLocId
svc.type = 1
}
}
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
if((indexPath.row % 2) == 0) {
cell.backgroundColor = UIColor(red: 0.9, green: 0.9, blue: 0.9, alpha: 1.0)
} else {
cell.backgroundColor = UIColor.white
}
}
我知道这是很多代码，我试图在示例中尽可能多地删除它发生的部分，同时保持菜单代码完整，
如果有人可以帮助我解决这个问题或指出我正确的方向，我将不胜感激。
打开菜单之前的tableview图片，
故事板的图片，左上角的控制器可以忽略，从登录（中上），我们转到菜单存在的位置（右下，中下），关于（右上）将正确显示菜单而没有空白空间，菜单控制器在左下角。
菜单仍然有效，尽管空白区域显示在带有 UITableViewDataSource、UITableViewDelegate 的控制器中。
更新：查看视图及其构建方式，我发现菜单高度约束不同。在 BaseViewController 中的 menuVC.view.layoutIfNeeded() 之后没有设置它。
print(self.childViewControllers[0].topLayoutGuide)
Empty Space Issue -> <_UILayoutGuide: 0x7fce6e7115e0; frame = (0 0; 0 0); hidden = YES; layer = <CALayer: 0x600000238700>>
Working -> <_UILayoutGuide: 0x7fce6e51ad30; frame = (0 0; 0 64); hidden = YES; layer = <CALayer: 0x60000023c9a0>>
您将如何仅更改视图的高度约束？我可以像这样获得只读视图约束，self.childViewControllers[0].view.constraints