Further to my earlier question
Migrating iOS Hybrid App from UIWebView to WKWebview
I have made good progress and only have a few loose ends to tidy up. The overall performance improvement over UIWebView is outstanding.
In UIWebView it was possible to set the focus on a text field programatically using
webView.keyboardDisplayRequiresUserAction = NO ;
However this is not available in WKWebView and ever since 2016 programmers have been developing an updating work arounds (swizzles) to overcome this.
I have tried implementing the latest of these I could find on Stack Overflow, which I found at https://stackoverflow.com/a/55344531/5948260
However as I am very inexperienced at coding in XCode please could someone tell me exactly how I add the above solution to my project. I have tried in vain to find examples of how exactly to do this i
on GitHub or elsewhere but to no avail.
So far I have tried copying the code provided in the above answer into a .m file and adding it to my project, but I got 20 or so errors, I then added an import statement for Foundation and most of these went away but XCode complained that it did not know what class WebViewInjection is. Also must there be a corresponding header file?. Must there be a corresponding interface statement? How does the method defined in the answer get invoked?
As I could not answer any of these, I also tried adding the method into my ViewController class. Whilst this was accepted with no errors, it had no effect on my app, ie. the keyboard did not come up automatically.
I would also want the webview to resize to appear above the keyboard and not to scroll to where the text field is as this seems a very messy solution to me.
All help very gratefully received.
I have now managed to get the keyboard displayed by adding
[self allowDisplayingKeyboardWithoutUserAction];
to viewDidLoad
I kept the allowDisplayingKeyboardWithoutUserAction method declaration inside my ViewController but changed the + infront of the method declaration to a - and this seems to have worked.
I still do not know how to resize the webview when the keyboard is displayed.
Related
I'm working on an app that'll have a range of images and the collectionview is not showing up at all. I was following this article, which I translated to C#.
here is an example app I made to show a minimal example of what I'm trying to do.
When I run through the code, GetCell in the collection source isn't firing which I know is the problem, but I don't know why it's not firing and I'm simply at a lost on what I'm missing.
I test it again today and I can make sure that the problem is caused by the MosaicCollectionLayout.
What I did today is that I removed your collectionView and add a new collectionView, then I add Constrains to it with a fixed height and width(to make sure it appears even if there is no data), then I change the layout to FlowLayout, it works, here is the screenshot:
After that, I changed the layout back to MosaicCollectionLayout, I get an exception in the line _cachedAttributes.Reverse(lastIndex.Row, firstMatchIndex.Value); inside the method LayoutAttributesForElementsInRect.
I checked the article and did not find a solution yet. Maybe there is some mistakes in the codes translated from swift to C#. So the problem is not related to the xib, please check the code in the method LayoutAttributesForElementsInRect.You can also try add Constrains to your collectionView. Hope these information helps you.
I'm testing my app on an iPod Touch running iOS 9 (on iOS 8.4 it was working for other functions: FaceTime, copy to contacts, etc.). I have a textview with phone number detection and I receive the following error:
Warning: Attempt to present <_UIRotatingAlertController: 0x16250e00> on whose view is not in the window hierarchy!
Assertion failure in -[UITextView startInteractionWithLinkAtPoint:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit/UIKit-3505.16/UITextView_LinkInteraction.m:377
Any fix to this?
Not a perfect solution but very simple and may help a desperate developer:
- (BOOL)textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange {
[[UIApplication sharedApplication] openURL:URL];
return NO;
}
You will lose the Copy, Open URL, Cancel popover on long press but you SHOULD at least be able to open url same as you would previously. In iOS 9, this still opens a browser window inside your app for standard URLs (which is nice).
This seems like an Apple bug (posted to radar already).
We were seeing very similar error when trying to open links in a modal view since Apple is trying to display a new modal alert view. Outside of modal view data detection worked just fine in iOS 9 for us.
This looks quite similar to a bug we recently had to fix for PSPDFKit where presenting sheets did not work when the rootViewController was already presenting another controller. (Is your rootViewController maybe not set?)
You can read the source code here. This might help you to figure out where the issue is for you:
https://gist.github.com/steipete/b00fc02aa9f1c66c11d0f996b1ba1265
And please dupe rdar://26295020 so this will get hopefully fixed in time for iOS 10. (The bug exists since iOS 8 and was first reported on iOS 8b5.)
We're currently developing an Xbox One and a Windows 8.1 app, which share the same codebase, and I'm running into an issue with the 'pointerover' (or hover-state) in of a listView item in the WinJS.UI.ListView.
The listview item has an eventListener, pointerover. However, this only seems to work on the first 10 items in the WinJS.UI.ListView although I see 16 items on screen, and the WinJS.UI.ListView gives me:
indexOfFirstVisible = 0
indexOfLastVisible = 15
The eventListener my listItem has, is:
mediaTile.element.addEventListener("pointerover", function (that) {
that._allItemsListView.currentItem = { hasFocus: true, index: this.tileIndex };
}.bind(mediaTile, this));
When I add a breakpoint, it get's hit but only for the first 10 items although there are 16 items on screen.
Does anyone know what I'm missing here?
Thanks in advance!
My guess is you're getting bitten by ListView visualization. Perhaps tiles higher than 10 don't yet exist when you bind your event listener, but they appear on screen quickly enough that it isn't obvious.
I'm not expert enough to advise a concrete way around this. Conceptually you could listen for an event when new items are added to the list (on the list itself) and then add your pointerover event to the new items.
Yes, that seemed to be the case when you look at it from a distance; another developer took over, and we also migrated from WinJS 1.0 to WinJS 2.0, which seems to solve a lot of these problems.
Up until today I'm not sure what the exact problem was; we also played with the fetch limit of the datasource and this also seem to have played a part in solving the problem.
I'm sorry I can't be more thorough in my answer; I would have to ask the developer (if he still remembers) what the problem was, but afaik the major improvement was moving to WinJS 2.0.
The whole day I am trying to solve this simple issue, but without any success.
I found a lot of hints in internet, but seems, that none of them is valid for my problem.
My issue is quite simple: I want to change the caption of a menue item while runtime
But it seems, that all solutions I found are very specific.
My requirements are this:
- it is a MFC application (VS2010)
- It is a SDI application, not MDI
- I want to change the caption of a main menu item (like "File"), not an entry of a submenue.
Because of main entry item, there is no ID for the menu item. Therefore solutions with ON_UPDATE_COMMAND_UI will not work!
My problems are:
- either the code I tried, is generating an assertion or exception
- or the function call returns with false
- or the function seems to work well, but I do not see any result (the caption is still unchanged)
Maybe I am using the wrong functions, or the wrong place for calling the functions.
Has anybody an example, which would work within my application pre-conditions?
Many, many thanks!
Richard
Windows cleverly hides the function to modify a menu under the arcane name of ModifyMenu. I hate it when they do things like that. Really makes me wish for Linux/Unix, with nice clear names like shmdt and mvwaddchnstr. Anyway, getting off my soap box for the moment, you'd call it something like this:
GetParentFrame()->GetMenu()->ModifyMenuW(1, MF_BYPOSITION, 0, L"New Item");
GetParentFrame()->Invalidate();
Getting started with xCode 4.6.3 and I'm running into a hiccup.
I've built a simple app using the UIWebView to display a local HTML file and it's contents. I used that to debug any issues with the HTML and/or image displays and I'm all set.
Now I need to recreate that within a larger project I've built with storyboards for all my navigations between multiple view controllers. My issue comes when I'm trying to control-click drag from the WebView into the ViewController.h code below the #interface like many tutorials show, and that worked fine within my smaller single view controller app. It won't do it. I know I'm missing something obvious here. Am I going to have the set up these screens (I have multiple ones to do this same way) as separate xib files and add them into my main project?
Thanks for any help and clarification.
-Chris
You can create a class called for example myWebViewController and in Interface builder add a UIWebView to it. The control+drag to the header file will work.
Every time you want a UIViewController that has a browser in it, define its class as myWebViewController in Interface Builder.
Try not to repeat code. If you see UIViewControllers or any other UIView...that do the same thing, you can group them into a class that you use over and over.