Here is before the keyboard shows:
Here is after the keyboard shows:
Here is what I want:
If there are enough messages, when move all of them up. If not, like shown in these two images above, then do not move the messages up.
What should I do?
By the way, I use Swift.
Thank you so much!
Because i can't add a comment. so i had to help you in this way.
You can provide us more information about table view's constraint. because if you listening keyboard notification and change constraint, maybe will become like this
If you use frame property to build this, the same point with first
You can run project and use xcode's Debug view hierarchy tool, to check tableview's state. check it's because table view's frame change and be clipped or you change table view's contentInset or other properties to made it ,like this
Related
I've been searching for a way to pin views/images to the top of a UIScrollView when scrolling. However the posts/articles I came across are not in swift 3. I'm not sure if I'm typing my question in the web correctly. So my question is how can we achieve the same behavior as a UITableView or UICollectionView. When you scroll, a section will stick to the top until another section pushes it up. I'm wondering would we be able to use views/image and pin them at the top of the UIScrollView. Down below is a screenshot of a UIScrollView that has 4 views.
So when scrolling I would like to pin the first view/image to the top until another view/image pushes it. Also would it be possible to determine which view sticks to the top. So lets say I only want the red views to stick until another red view pushes it. Been looking for a way to achieve this type of behavior for a while now.
Please help, would really appreciate any help provided at this point. Thanks.
A few ways to do this, but you can use the scrollView delegate’s scrollViewDidScroll to capture the contentOffset and use a combination of the target view’s origin/center/transform properties to keep the view where you want it.
There’s a neat video explaining how to do this that Apple released during WWDC 2010, called something like “Advanced Scroll View Behavior”, if I remember correctly. It’s definitely worth a watch.
I can get the keyboard's dimension after its displayed from the notification, BUT I would like to position my textFields so that I don't have to scroll them when the keyboard appears. To achieve this I should know the keyboard's dimension BEFORE it's even displayed.
Is this possible on iOS?
You can use a class where this all things are handled by default. Just you have to use scroll view for this.
TPKeyboardAvoidingScrollView
See if it's useful and fulfill your requirement.
I have a swift app I have been working on for some time now. I noticed that my init view controller has extra space at the top and the bottom of the view, so much that it allows me to pull up and down on the first view and let go and have it spring back into where it was. I removed all my constraints thinking I had an issue with them, but it's still done the same thing. The size class is set to any any, and all my graphic fit inside the view, yet I still an able to pull up and down.
I also made sure my view, wasn't a scroll view, it's not.
I looked around for similar issues, but couldn't find anything like this.
Thanks for the help!
Here is what my view looks like in IB
When I run the app.
Showing the amount I am able to pull it down from the top.
If you remove all of your constraints, and the storyboard is set to use auto layout, it usually won't show up correctly, as you have seen. You will have to add the constraints to each element in your view controller. To do that, you can control click on each and drag it where you want to connect a constraint. Or, use the pin and align buttons in the bottom right corner of the storyboard view.
There is a good tutorial from apple that I suggest you read. It will help you with the basics of using auto layout. Another option would be to not use auto layout. To turn it off in the Storyboard, go to the file inspector and uncheck the box "Use Auto Layout".
For some reason I cannot get all switches to display properly on a screen. Some of them appear to be overwritten on the left edge but from what I can determine all of the switches and text views are correct. Any suggestions are welcome
So first, to make sure that this is the problem: while your app is running, click on the two rectangles overlapping on the right of the Debug Area to "Debug View Hierarchy"
When you have that, rotate your views to make sure that in every row you don't have your text views overlapping your switches. That's what it looks like what's happening, but you can use this tool to confirm so.
If so, and you are using auto layout, make sure you are setting your constraints correctly. If not, then make sure you are setting the width properly. To prove it's an autolayout issue, you could temporarily hard code a length to every text view to see if the issue is still there. If that fixes it, than auto-layout is just making your textviews wider than they should be.
Good luck!
For my current project I wanted to use storyboards and autolayout instead of coding everything by hand. It has gone well so far, but my design has a section of the app where there is a tab bar and one of those tab needs to show four views. The design is to swipe between the four and so I thought to use a scroll view. After some trial and error I found that embedding a Container View in the tab allowed me to easily set up a scroll view and put a couple of view inside it, carefully aligning them using positioning to put them side by side so that each page is one child view. I'm not sure how that plays with the autolayout, and in fact I have the problem that the scroll view won't scroll past the first page position. I can drag about 1/3 of the second page into view, but it never brings that page entirely in view.
I've checked the content size and offset and all of the view positions and it all seems correct. And when I use Spark Inspector to change the scroll offset to the position of the second view/page, the app shows the right page/view and I can even scroll back to the first page. I'm a bit perplexed as to what is causing it to not scroll properly. I don't have any code to show as this is all done in storyboards, but I am wondering if anyone has any ideas as to what is wrong?
Alternately, does anyone have an idea for how to use autolayout and storyboards to set up swiping four adjacent views in a tab? I suspect there are ways to do it. I can think of ways to do it in code, but I'm trying to avoid doing it that way.
EDIT: I set the scroll view delegate to the view controller around it and checked the values of contentSize on scrollViewWillBeginDragging and scrollViewDidScroll. It is always set to {0,0} even after I force set it on viewDidLoad. So I tried setting it every time scrollViewWillBeginDragging is called, which seems work, but I don't understand why this happens and it doesn't smell right. Is there some autolayout constraint that might account for this? Does something cause contentSize get set to {0,0} during the layout process?
For lack of any other answer, I'll use my unsatisfying solution as an answer in the hopes that helps someone else in the future:
I set the scroll view delegate to the view controller around it and checked the values of contentSize on scrollViewWillBeginDragging and scrollViewDidScroll. It is always set to {0,0} even after I force set it on viewDidLoad. So I tried setting it every time scrollViewWillBeginDragging is called, which seems to work.
I'd love to know why the contentSize is being reset if anyone finds out!