Is there any way to avoid the new presentation sheet style introduced on ios 13?
I am trying to do that in my CustomNavigationRenderer, without lucky
public class CustomNavigationRenderer : NavigationRenderer
{
public override void ViewDidLoad()
{
base.ViewDidLoad();
base.ModalPresentationStyle = UIModalPresentationStyle.FullScreen;
...
}
Yes. If you look here you can see UIModalPresentationAutomatic defaults to UIModalPresentationPageSheet. Just change your modalPresentationStyle to UIModalPresentationFullScreen.
First create your new viewcontroller. This needs to have the modalPresentationStyle property set.
var modalViewController = new UIViewController();
modalViewController.modalPresentationStyle = UIModalPresentationStyle.FullScreen;
Then, present this viewController on top of the NavigationPage. NavigationRenderer has a property called ViewController:
this.ViewController.presentViewController(modalViewController, true, nil);
Related
I created a View and mapped it to a MKMapView via code, but I cannot seem to have the Navigation Bar show up (it's the 2nd view in the stack, so it should have some ability to show the bar).
The map creates well with all functionality I want, BUT, it takes up the entire view space on the View
public override void LoadView()
{
CoreGraphics.CGRect r = new Rectangle(0, 40, (int)UIScreen.MainScreen.Bounds.Right, (int)UIScreen.MainScreen.Bounds.Bottom);
map = new MKMapView(r);
View = map;
}
any ideas?
To show Navigation Bar , you need make sure that the RootViewController of the Application is an UINavigationController (not an UIViewController) .
in Appdeledate.cs
public bool FinishedLaunching (UIApplication application, NSDictionary launchOptions)
{
// Override point for customization after application launch.
// If not required for your application you can safely delete this method
Window = new UIWindow(UIScreen.MainScreen.Bounds);
Window.RootViewController = new UINavigationController(new YourViewController());
Window.MakeKeyAndVisible();
return true;
}
in SceneDelegate (if your app contains it)
public void WillConnect (UIScene scene, UISceneSession session, UISceneConnectionOptions connectionOptions)
{
Window = new UIWindow(scene as UIWindowScene);
Window.RootViewController = new UINavigationController(new YourViewController()) ;
Window.MakeKeyAndVisible();
}
And when you navigate from the first page to the map page
NavigationController.PushViewController(new YourMapController(),true);
Can I use both of them in a project?
I need to override WKUIDelegate's CreateWebView method in order to open target=_blank links:
public override WKWebView CreateWebView(WKWebView webView, WKWebViewConfiguration configuration, WKNavigationAction navigationAction, WKWindowFeatures windowFeatures)
{
var url = navigationAction.Request.Url;
if (navigationAction.TargetFrame == null)
{
webView.LoadRequest(navigationAction.Request);
}
return null;
}
When I use WKUIDelegate in a demo it works (opens target _blank). But in real project they used WKNavigationDelegate too. And applying WKUIDelegate CreateWebView doesn't work.
OnElementChange in the renderer is like this:
var config = new WKWebViewConfiguration { };
webView = new WKWebView(Frame, config);
// Set the delegate here
webView = new WKWebView(this.Frame, new WKWebViewConfiguration());
webView.ScrollView.ScrollEnabled = true;
webView.ScrollView.Bounces = true;
webView.NavigationDelegate = new DisplayLinkWebViewDelegate();
webView.UIDelegate = MyWkWebViewDelegate();
SetNativeControl(webView);
WKNavigationDelegate : It helps you implement custom behaviors that are triggered during a web view's process of accepting, loading, and completing a navigation request.
And the WKUIDelegate class provides methods for presenting native user interface elements on behalf of a webpage.
The webpage here is not the webview ,but the html which been loaded on webview.
As we can see in following image
The method in WKUIDelegate are all associated with JS.
For more details about the two protocols you can check https://developer.apple.com/documentation/webkit/wkuidelegate?language=objc
and
https://developer.apple.com/documentation/webkit/wknavigationdelegate?language=objc
if you want to do something when the webview finished loading, you can implement the method DidFinishNavigation in WKNavigationDelegate .
public override void DidFinishNavigation(WKWebView webView, WKNavigation navigation)
{
if(!webView.IsLoading)
{
// do some thing you want
}
}
How to change the height of a Tab Bar in Xamarin.Forms (iOS)? Is it possible with TabbedRenderer?
Yeah this is possible to modify from a CustomRenderer.
You will need to subclass the TabbedPage in the Forms project and use this class to export the render.
Then in the CustomRenderer override the ViewWillLayoutSubviews method. Something like:
public class MyTabbedPageRenderer : TabbedRenderer
{
// Modify this variable with the height you desire.
private readonly float tabBarHeight = 55f;
public override void ViewWillLayoutSubviews()
{
base.ViewWillLayoutSubviews();
TabBar.Frame = new CGRect(TabBar.Frame.X, TabBar.Frame.Y + (TabBar.Frame.Height - tabBarHeight), TabBar.Frame.Width, tabBarHeight);
}
}
Hope this helps.-
I am using xamarin to develop a Mac app, and somewhere in my program I want to set the tag of a NSView. However, the tag property is readonly for NSView, so I'm searching for a way to create a subclass where tag is writable. Is there any suggestion about how I should write the subclass? thanks
public class MyNSView : NSView
{
public nint _tag;
public new nint Tag
{
get
{
return _tag;
}
set
{
_tag = value;
}
}
Be aware that this is not longer the NSView Tag.
Using your custom NSView Tag
var view = new MyNSView ();
view.Tag = 100;
I found a workaround to get viewWithTag working:
#IBInspectable
override var tag: Int {
get { return super.tag }
set { super.tag = newValue }
}
In IB the NSView's Tag is still greyed out, but there is also a subclass's Tag available for setting a value.
Still, to my best effort, I can't find a logical reason for Tag to be greyed out in IB.
My app supports iOS8+ devices. I want to hide right Action button from navigation bar. By research I found following few workarounds:
1. Create Sub class of QLPreviewController and in ViewDidAppear SetRightBarButtonItems to zero.
public class PdfViewController : QLPreviewController
{
public override void ViewDidAppear (bool animated)
{
base.ViewDidAppear (animated);
NavigationItem.SetRightBarButtonItems (new UIKit.UIBarButtonItem[0], false);
}
}
In this case problem is RightBarButtonItem appears and then disappears. In mean while user is able to click on that RightBarButtonItem button. I don't want this behavior.
2. Create UIViewController and add QLPreviewController as child ViewController.
void BtnShowPdf_Clicked (object sender, EventArgs e) {
var dummyVC = new UIViewController ();
var pdfVC = new PdfViewController ();
dummyVC.AddChildViewController (pdfVC);
dummyVC.View.AddSubview (pdfVC.View);
dummyVC.NavigationItem.SetRightBarButtonItems (new UIBarButtonItem[0], false);
dummyVC.EdgesForExtendedLayout = UIRectEdge.None;
dummyVC.AutomaticallyAdjustsScrollViewInsets = false;
dummyVC.View.BackgroundColor = UIColor.Clear;
pdfVC.EdgesForExtendedLayout = UIRectEdge.None;
pdfVC.AutomaticallyAdjustsScrollViewInsets = false;
pdfVC.View.BackgroundColor = UIColor.Clear;
}
In this case If I set QLPreviewController it works as expected. But NavigationBar becomes more darker than default ViewController background color.
Dark Bar:
http://screencast.com/t/bqVMv5qqGz
Needed clear background bar like:
http://screencast.com/t/MUwE2VnxJ7
My questions are:
A) I would like to know which is the correct way to hide right
navigation bar button as per Apple guidelines ? If you have correct
solution then those are also appreciated.
B) Also Can you please suggest solution(s) for #1 Or #2 ?
Pretty sure you can do this:
override func viewWillAppear(_ animated: Bool)
{
super.viewWillAppear(animated)
self.navigationItem.rightBarButtonItems = nil
}