I am pretty sure this has something to do with the dreaded AutoLayout. (been trying since 2days to get hang of it)
So I mastered it somewhat, but now I have problem where my UIScrollView is not scrolling fully down, pictures are much better at explaining these things
this is the scroll view
this is the content view
so the problem is the scrolling is happening but then again it springs back up. So I am not able to click on the signup button
EDIt 1
Edit:
I have created a little example on github for you to look at, here. The project illustrates the answer below and uses the techniques I describe and nothing else.
Original Answer:
couple of things I would advise here.
First, I know you've been trying for a while but remove all the current constraints (painful I know but). Do this for clarity as ....
The view should be the size of the scene, it looks like you want the scrollview to be the full screen so that too needs to be the size of the scene.
e.g. if you are designing at 6Plus by default the scene size is 414x736 so the view and the scrollview it contains should also be 414x736.
Only the content view needs to be the size of the real content you wish to show. Let's say for arguments sake that the content is 414x1000.
Now the constraints for the scrollview are simple. It needs zero spacing to all it's edges.
You can add the content view to the scrollview in a couple of ways. The way I try to do this varies from project to project and depends mostly on how complex the scene is. If it's a really busy scene I keep the content view outside of the scrollview in interface builder so that I can work on it easily and visualize the whole of the view. Then I add the content view to the scrollview in code.
If its a simpler view You can add it inside the scrollview in interface builder. Ultimately whichever way you do it, you can lose visibility of the content view in interface builder because the contentview is larger than the scrollview and the content gets obscured. So play about and find a good way for you.
Define the content view and all it's subviews. The content view needs to be taller than the scrollview otherwise it wont scroll. All of the content view's subviews need to have defined heights from top to bottom and widths from left to right. In your case the scrollview is scrolling vertically not horizontally so all the widths need to add up to the width of the scroll view BUT the heights need to add up to the full height of the content view.
Note: if you do this proportially your life will be easier later. If you do all this with fixed heights the storyboard will break on different device sizes.
Now the "tricky bit" and it's a bit counter intuitive. You need to pin the content view to the scrollview, remember the height of the content view is taller than the scrollview. In all other circumstances in Interface Builder pinning a view to a superview (0 padding) will adjust the height (or width) accordingly. For the relationship between a scrollview and it's content view this doesn't happen.
First pin the contentview
Notice the -400? Remember the content view is taller than the scrollview and we will change this immediately.
Select the bottom constraint (-400) that we have just created:
Select the drop down arrow next to the constant value:
Select Standard Value and type in 0 for the constant.
You should now have a storyboard with no broken constraints and if you build and run you should get a scrollview as desired.
Your bottomspace to superview on your content view is set to -74.0, I don't know if there is a reason you had to do that, but try setting it to -8.0. I think your scroll view is scrolling up to the 0.0 mark automatically
Related
I'm trying to make a ScrollView so that its size adjusts to the size of the text. I placed all the necessary constraints
, but when the application is displayed on the simulator, the content view starts from the safe area and also ends up to the safe area. Although I have pinned scroll view to superview and content view to scroll view.
I want the content to start not from the safe area like here ,
but from the start of the screen like here
in other words, I want to remove the blue bar from the top and bottom
Do you have any ideas how to do it?
Sometimes UITableView & UIScrollView can still show safe area even though you attach your View to top of Super View. You just need to add one line to solve this issue but make sure your ScrollView is connected to superView not safe area at the top.
Add scrollView to your ViewController and in viewDidLoad() just write:
scrollView.ContentInsetAdjustmentBehavior = .never
Check this answer for further details: Make UITableView ignore Safe Area
I am attempting to set up a scroll view and every video I watch they say the same things:
•Make scrollview in VC
•Make it bound to all margins (0,0,0,0)
•Embed a content view inside of Scrollview
•Content view margins are (0,0,0,0)
•Set Equal heights & width from content view to superview
•set priority of height to 250
I have done this time and time again and cannot figure out why it still isn't working. Can someone please double check these screenshots?
Try adding some subviews into your content view and make sure to have a complete set of vertical constraints from top to bottom.
If you go in the Size inspector under the "Scroll View" Section you can find the "Content Layout Guides" tick, disable and the errors will disappear
If you Set All the constraints to ScrollView and want to set its contents in code .. it remains complaining about its constraints because they remain ambiguous .. so to remove error from story board
what you do is set Ambiguity to never verify and error will go away .... hope it will help
Looks like you do not have anything bound to your Content Layout Guide.
So basically you have two guides in Scroll View: Frame and Content.
Frame Layout Guide provides you the ability to bind to your UIScrollView's frame. E.g. equal width between your Content view and Scroll View itself.
The most useful here is Content Layout Guide. Basically it helps to determine the scrollable content size of your UIScrollView's contents.
So in your case you have to have a Content view inside your Scroll View that has equal width with Frame Layout Guide and have its edges pinned to Content Layout Guide. Like so:
Oh, and do not forget to have your Content view have a determined height so your scroll view will calculate the size of its scrollable contents.
I know that I asked a question a few minutes ago, but I want to make a few points clearer before asking for the community's help. I'm new to iOS development, close to finishing my first app. The only thing standing in my way is this UIScrollView. I simply do not understand it, and could use your help.
This is in the detail view controller of a drill-down app with a tab bar. I have approximately 8 fields (for things like phone numbers and such) drawing from a .plist. Obviously, those take up enough room that I could use a little extra real estate. I would guess that it needs to be about the size of two views vertically, but I do not understand how to allocate that sort of space to a UIScrollView. Some tutorials I have read say that you don't even need to define it in the header, which I doubt and do not understand. Additionally, I do not understand how to simply get the app to smoothly scroll up-and down only. Apple's examples have constant move cycles that flip between horizontal pictures.
I doubt it makes very much a difference, but I have an image that is in the background. I'm going to load the view on top of that.
My question is broad, so I don't expect you to take the time to sit down and write out all of the code for me (and I wouldn't ask you to). Just an outline of quick, helpful tips would help me understand how to get this view to load in the context of my project.
Many thanks!
It's fairly simple. Add a UIScrollView to your view. Add your fields and such to the scrollview. In viewDidLoad or somewhere similar, you need to set the contentSize on your scrollview. This is the "virtual" area that will be scrollable. This will generally be larger than the frame of the scrollview. In your case, you indicated it should be roughly double the width.
For instance, if you had a scrollview with a view inside, and you wanted to make sure the entire view is visible via scrolling:
self.scrollView.contentSize = self.contentView.frame.size;
//setting scrollview zoom level
self._scrollview.minimumZoomScale=0.5;
self._scrollview.maximumZoomScale=6.0;
self._scrollview.contentSize=CGSizeMake(320,500 );
you have to outlet scroll view in .h class and #property #synthesis this scroll view.then you can able to scroll up and down,if u want only vertical scrolling ,then u have to go to interface builder and uncheck the horizontal scrolling.
You can set a few settings for your scrollview to limit the scrolling to horizontal or vertical. A few important ones are:
// pseudcode here, start typing "[scrollView " then press escape to get a intelli-sense of all // the things you can set for the scrollview.
// values could be YES/NO or TRUE/FALSE, I can't remember which one but
// I think it's YES/NO. Once you start scrolling, the phone will determine
// which way you're scrolling then lock it to that direction
[scrollView setDirectionalLockEnabled:YES];
// when you slide the view, if enough of the next part of the view is visible,
// the scrollview will snap or bounce the scrollview to fit this new "page".
// think of swiping feature to navigate the iPhone home screens
// to show different "pages" of iphone apps
[scrollView setPagingEnabled:YES];
// as a safe guard, make sure the width of your scrollview fits snuggly with the content
// it is trying to display. If the width is more than necessary to display your table of
// data vertically, sometimes the scrollview will cause the
// horizontal scrolling that you don't want to happen and you get bi-directional scrolling
Just set the content size of UIScrollView after adding all the controls/button/textfields etc. for example you add 10 textfields in UIScrollview then content size of UIScrollView will be
lastTextField.frame.origin.y+lastTextField.frame.size.height+20; 20 is for margin.
That's it let me know if you want to know something more related to your app.
I have a UIScrollView which contains a timelime. Sometimes I may only want to let the user see say one third of the view and therefore I would like it to only show this part of the scrollview but still have this nice "bouncing" effect in both ends of the view to "preview" what is outside the scrollable area.
Is there any way to do this?
I think you should specify the size of the UIScrollView to end where you want your user to scroll to but leave the size of the inner view (subview) of the UIScrollView.
OK, so I am learning to use UIScrollView in interface builder. since the scrollView itself does not have any content, I created another view, the contentView, to hold my controls and scrollable content. into this view I place controls, labels, etc and then in my code i set the contentSize of the scrollView to the size of this contentView.
My question seems stunningly simple and so obvious that I must have missed something somewhere. when I created this XIB in IB I got your standard empty iPhone interface window. I dropped a scrollView on top of it, it took up the whole window. I dropped a view on top of that, it took up the whole scrollview. I added some controls, which so far I can still see inside the contentView rectangle in IB.
My question is how do I work on/add controls which lie outside of the visible part of the contentView in IB? LOL. it seems so simple, but i just don't get it. I can set the height of the content view or drag the rectangle to whatever I like (and indeed this is the whole point of having a scrollview) but the fixed UI window from IB won't expand so i can see the "offscreen" part of the contentView to add more controls. It's like it's just fixed at that size because that's the size of one iPhone screen and it won't let me make it any bigger/taller.
what did I do wrong?
-a
You need to turn off all simulated user interface elements (like the status bar) to be "undefined" except for size, which you select to be "Freeform" from the drop-down, and then you can set the view height using the Ruler tab to be whatever you like.
For example, here I've selected a photo view controller, and set the size in the right side bar to be "iPad Full Screen" - but I could also change that to "freeform" to set any height I wished.
First add a ViewController by any which way you prefer. Then in interface builder, click on the view controller Icon (on left). In the connections inspector click on the ruler icon "Show the size inspector". There will be option list for simulated size, change to "Freeform" and increase the height to any size you want. Hope this helps.
neeever mind. you drag the content view up so that some controls are offscreen and then add more controls/expand to the part you just made visible by moving the top stuff off the top. in effect, you physically scroll the contentView in IB by dragging it with the mouse. seems a smidge counterintuitive, but whatever.
Set simulated size to freeform for the the view controller to a large enough size that you can add in your controls
You don't have to create a view to place inside the scrollview if you don't want. In your case, it sounds like it doesn't make much sense.
As for the second part of your question, you can place items directly on the scrollview (it is a view afterall), as subviews. If you want them to be off screen, then just set their frame up to be at those particular x, y coordinates you want it to be at. You will have to ensure your scrollview's contentSize property is large enough though to house your entire content, this is what allows scrolling horizontally/vertically.
You probably want to do the offscreen elements programmaticly instead of using xibs.