I'm starting to learn swiftUI and I have a strange problem,
I have created a simple list that displays perfectly in the preview... But not in the simulator.
Does anyone have an idea?
https://www.dropbox.com/s/eo1ldvdbgntzr8v/Enregistrement%20de%20l%E2%80%99%C3%A9cran%202021-06-04%20%C3%A0%2018.42.03.mov?dl=0
Project : https://github.com/maxupcreation/Dfi/tree/main/Dfi
to answer more correctly, you'd better show us yout whole source code.
it seems second view(maybe AddChallengeView.swift file)'s input cannot reflect to original view(=ContentView.swift)'s List. so there might be two problems
because you refer your "items" property from another view, you'd better check if you use ObservableObject protocol and #ObservedObject property wrapper properly.
at ForEach statement, you use nil coalescing, so check whether item value is nil
Related
I'm working on an app that involves inputting the amount of cards players ended up with, and ordering them in a list. But if theres a 2 or 3 way tie, I want the user to be able to have a menu that lets them select the order of who had the highest card to lowest card, that way I can organize the list. How do I get the user to order them, like what kind of Alert/Popup lets me do that?
Edit: Basically I was asking how to make a picker that lets you arrange multiple items into a specific order but it seems the best thing to do is just to have a stack appear with buttons for each item, where you can click them and go from there to create your order. Hope this helps for anyone in a similar situation!
For that kind of user interaction where they are doing more than just tapping an option (in your case, you want them to order the various cards), I would create your own custom view rather than use an alert or action sheet or similar.
The way you implement will depend on how you want it to look. If you want the view to appear on top of your current view (a bit like an alert does) where it only takes up the space needed for the content) then you can embed in a zStack. If you want it to slide up from the bottom as almost the same size as the full screen then you can use a sheet (sometimes also referred to as a modal).
A little difficult to explain how they look visually - if you google image search “SwiftUI sheet” then you’ll see what I mean (if you aren’t already familiar with them)
ZStack
you put your current view in a ZStack then create a new view which goes in the ZStack after it but you wrap it in an if statement so it’s conditionally shown based on a Boolean being true.
E.g.
if gameTied { ChooseSortOrderView() }
then when your game finishes - if it’s a tie, you set your Boolean to true and up pops the new view.
You can pass in the tied cards, get the user to sort them via drag and drop, form, picker (whatever you want), submit it. Then set the bool back to false to make the view go away.
sheet
The other alternative instead of using a zstack would be sheet so you get a modal view appear. Similar approach but instead of the ZStack, you use a .sheet modifier.
I have look made some search, however could not find any information. Question is pretty straight-forward. I don't know if it is possible, but, in this link they could create a NSMenu item via xib files. So I thought maybe it is possible to create NSMenu using SwiftUI as well.
The answer for me was wrapping my desired SwiftUI view code using NSHostingView. Apple Docs
I can share the snippet, however it may take some time because I do not have laptop containing the project with me.
I'm building a SwiftUI app for macOS, then I came with the following challenge.
Given a view hierarchy like:
Which basically shows a collection of elements in ElementListView. Then the FiltersView is used to search new elements to possibly add to the element list, the results of that search are shown in rows like FilterRow.
When a user clicks on FilterRow, that means I want to add a new element to the ElementListView, but I am not sure of How to propagate events between the two branches of the view hierarchy in SwiftUI?
If I were to implement this in pure AppKit, I would probably use the responder chain, but I guess it's not the SwiftUI way of doing it.
You can have a shared ObservableObject for filters and list views. As soon as ObservableObject changes SwiftUI updates views connected to it.
I have the following problem with ember.
I have a table with a set of datas. I have an event that returns me the current element of the table. Then it opens another view by transitioning into a new state and writes the selected table data in a textfield.
click: function(e) {
var element = $(e.target).closest("td");
App.tee = element.text().trim();
var router;
router = this.get('controller.target.router');
router.transitionTo('newRoute')
As you can see I have some other routes in my router as well.
The last two routes(home and profile) are part of a nav-tab. They work perfectly beside I click on the table. Then i get the following error when i click on a tab: Uncaught TypeError: Cannot read property 'enterStates' of undefined
Ok i give it another try to explain what i wanted to do.
What i want to do is to create a table with some data (for example persons).
When i click on a specific person in the table the corresponding table-data should be shown in the textfields that appear below. Whenever i click on another person the textfields below should change to the informations of the current clicked person in the table. When i click "New" Button a more detailed Tabview appears on the right side with some additional informations. I was playing around with ember and so far i just implemented some of the views and the routing. Im stucked as i have tried to implement the event that updates the textfield below the table. It updates once but after it has transitioned into the new state(newRoute) nothing happens. I know the code is very raw, but it is just a test to understand how this works in ember.
Ok the solution was easier than i thought. The problem was not the state changing. It was more a problem of how to access the data and how to effect the change of binded data. I realised too late that i needed to understand how the variable access works in Ember and what exactly the App.initialize() method does. So App.initialize() initializes all Controller classes in the router. If you want to access any variables within a controller you have to get the access over the router like
{{view Ember.TextField valueBinding="App.router.tableController.person"}}
Secondly i wasnt familiar with the usage of the set and get methods in Ember and the difference between extend and create. I wondered before where ember instantiates my object.
So my problem had nothing to do with states it was just a totally misunderstanding of the ember framework. Im a noob thats all.
Ok, this is the first shot of the answer.
I think the main issue is just a typo gotoHome instead of goToHome in the template.
By the way I get rid of some deprecation warnings by using <button {{action }}></button> instead of Ember.Button.
There is some other warnings when I click on the table, because you are referencing some properties which don't exist.
here is the corresponding fiddle: http://jsfiddle.net/Sly7/rKw9A/25/
Since I don't understand how it should work exactly, I'm not sure of the overall behavior. I let you explain me the flow (by editing the question please).
Any other comment is welcome :)
I just having a little trouble to implement a special kind of view for Ember, I'm digging on the source for days but can't find how to make it work... Can you take a look and tell me what's wrong? It's a small code, a specific problem when rendering one view from another (it's not doing the binds right...).
The sample code (with comments) that demonstrate the problem is here: http://jsfiddle.net/wilkerlucio/rUUuN/
Edit:
Just to clarify, I'm trying to do a view that dynamically render another view. It can be useful for a lot of implementations, like tabs for example. On tabs you have the tabs and the container that shows current tab, so, the view that I'm trying to accomplish is like this current tab container. Each tab has it own view, and I need that my view be able to render the view for the current tab.
I know I can do things like just hide a view and show the other, but it's not the way I want it right now. This CardView that I'm creating should have a binding to a property that will return a view instance, and the CardView will render this view, and will update if the property that points the view updates.
You can see a more full covered example about what I'm trying to do here: http://jsfiddle.net/wilkerlucio/Ztdpb/
Thanks
I think that you need to specify the template as such:
App.CardView = Ember.View.extend({
defaultTemplate: SC.Handlebars.compile('{{App.obj.value}}')
});
or
App.CardView = Ember.View.extend({
templateName: 'sample'
});
If you are planning to have many child views, then you may want to try to use a collection view.
This link is a bit old, but it is still not bad: http://guides.sproutcore20.com/using_handlebars.html
I've also blogged about how it implemented CRUD operations with Ember (SC2) here.
Hope this helps.