When I add an image and constraint it to remain in the top-half center of the screen; I would like it to work with all iPhones except it doesnt,.the problem is it only works with iPhone 4 portrait and landscape that I have but when I change the iPhone to iPhone 6 it doest stay in the middle, does anyone know why?
To geta an element in the middle of the screen here are a few tips:
Ensure you drag the object in to the middle of the screen (Horizontally). You will notice guideline's appear up the screen.
Set the constraints on the item which include 'Set Horizontally in container' & Set a top constraint only (You may want a height wand width also, experiment with this.
For an image make sure that you have set your fill property for your application. (Aspect Fill etc)
A good tip to get used to auto layout is to set your view controller to iPhone 4 and design on that (With constraints of course)
Auto-Constraints are rubbish, create them yourself!
Related
I need to make something like this
the problem is 6 buttons in the middle, how to make it manually by using scroll view? I need to use scroll view since it will be a problem if in landscape mode
here is what I make
https://drive.google.com/file/d/10TBjW3qAaDEGJ_I_EQBPr5anzGcG1-er/view?usp=sharing
the problem is, in iPhone 5s, it seems it can be scrolled horizontally even though I have set width of content view to be the same as scroll view, and in larger phone, it seems not located centrally and not fill the screen
I don't know what went wrong with the auto layout
I unzip your project, and open the storyboard to check those constraint. You can change device to iPhone SE as the red rectangle marked. I notice that the Width of Content View is fixed with 375. It should be as the same as the width of Scroll View.
After updating the width of Content View constraint, I remove the Width:375 constraint, and apply new one that to equal to the width of Scroll View. It looks like the following image.
Hope those help you.
In my application i have a screen which contains close button on top and program information at bottom and both trailing,leading,bottom and top constraints related to safe area.
Button width and height is 1:1. Program info area height is 0.25 of view height. In run time adding avplayerviewcontroller view on screen whose height is 75% of self.view.It's working fine in all device except iPhone X. If i launch app in landscape then alignment is fine and if I change orientation I can see 44 pixels as x value. If I launch app in portrait first then portrait orientation values are correct if I change orientation to landscape then 44 pixels top(y) value is adding. I am not getting how to fix this issue. Please guide me.
[![enter image description here][1]][1]
I guess your problem is that you have defined constraints in percentages, which might be an issue. When you rotate the screen the mid section might be too small. Have you tried the rotated layout in interface builder to see what is happening? Defining layouts with constraints is relatively easy in interface builder and you can test the layouts as well.
If you programmatically set the constraints, it is hard to find out where it went wrong. If you have one ambiguous constraint, the whole screen can be weird.
If you need to make programmatically set constraints, you should make a test setup in interface builder and implement the good setting in the program code, when everything works as planned.
I have checked your storyboard and I think the issue might be that you have two safe area defined. One outside the containerview and one inside. What you put inside the container view, might be wrongly calculating the constraints inside.
Try to take out this checkbox and try it again.
I went through ray wenderlich's tutorial about autolayouts (link) and then began working on a demo project thinking I've figured it all out but I was wrong. As shown in the screenshot below I have a navigation bar, 2 views and 1 button. The layout on portrait mode looks fine without adding any constraints on views or the button, and understandably in landscape mode views are messed up. I tried adding following constraints on views and those don't seems to work.
View#2: Select view 2 > Editor > Align > Horizontal center in container (hides view completely)
Add Top space to superview. Again view goes away from both landscape and portrait preview.
If I can display view#2 correctly I am planning to add vertical space between view#2 & view#3 and then between view#3 and button#4.
My main concern is to resize the views so that it shows all views and buttons in iPhone 4s landscape mode. Any advise or suggestions are appreciated.
EDIT: Here's the end result that I am trying to get:
The reason your views go away when you add constraints is because a UIView has no intrinsic content size, so its size is {0,0}. The view appeared when you didn't add constraints because the system adds constraints for you, if you don't add them yourself; the system added ones are top, left, width, and height. So, you need to set the size of the views somehow. You can give them explicit size constraints, you can pin them to the edges of the superview, you can give them relative heights based on other views, etc.
Since you want the 2 views to get proportionally smaller in landscape, you should give them heights that are relative to the superview. You do this by selecting the view and the superview, and choosing "Equal Heights" from the pin menu. Edit that constraint to change the multiplier to something like 0.25 for the blue view and 0.2 for the orange one (this assumes that orange or blue view are the first item in the constraint -- if they are the second, then you should use the inverse values of 4 and 5). You should also do the same for the widths, since it seems you want them to get proportionally smaller too.
For some reason when I add constraints, by clicking "Add Missing Constraints," it actually looks worse than without constraints in the iPhone 4S simulator.
Here is how it looks in Xcode:
Here is how it looks in the simulator:
Notice that even with the auto constraints, the top text is hidden in the simulator. I want it to look exactly like it looks in Xcode, but I cannot figure it out. I have played around with the constraints for hours now to no avail. It looks better and better with the bigger screen size I use in the simulator, but I need it to have a universal look across all devices. What am I doing wrong?
First remove all constraint for the view.
1) Apply pin Width and Height constraint for your all three controls.
2) Apply Top space from Top Layout Guid for all three controls.
3) Apply Align Centre Horizontally in Superview of your all your three controls.
After applying above constraints your controls will appear in centre in any device.
I believe the three controls should be centre aligned with the top view and the vertical space between the three controls is constant.
The controls will automatically adjust their width according to the text given. So all you have to do is to only add the constraints for their positions. So each control will need two constraints, only for Y position, another for X position.
And of course, you can change the multiplier of the constrains to support the Landscape orientation.
I'm using Interface Builder in Xcode 6 to make an app and am having trouble getting the text fields and button to centre on the screen for different size screens.
I thought it was a matter of selecting horizontal and vertical centering in container but it doesn't seem to be that when I try it in auto layout. Actually I've tinkered around a bit and I still haven't got it.
I just want to be able to see all of my button and text fields for any size iPhone screen and right now simulator is only showing part of these UI elements like this:
I also want to do this in storyboard and not in code as I'm not at the level of doing this in code yet.
Step 1: Make sure your size class covers all the iPhone screen at least in portrait view. So, change the size class to "wCompact hRegular".
Step 2: After setting the size class properly, add the UITextFields and UIButton to your storyboard. To me, it looks something like-
Step 3:
Before, you start adding constraints, you need to remember two things-
a. Your element(UITextField, UIButton, UIView or any component) needs to know its starting position unambiguously, and
b. Your element needs to know its size meaning, its height and width.
In this case, as you want to centre your elements, I am just assuming that it needs to be centred starting from 10 scale from the left edge and should end 10 scales away from the right edge of your iPhone screen. Now, that means, it's width will be different based on the screen size, but its height will be same.
So, I just add the constrains following way for the 1st text box-
Notice, in the size inspector, I set the text box's starting point, x and width in a way that it is 10 pt away from left edge and 10 pt away from the right edge. Don't worry, it's just simple math.
For the 2nd textField, I add the constrain, the same way-
Lastly, for the button, the constrains are following-
Now, you are good to go. Everything is centered.
By using your size class selector in the bottom of the storyboard window, set you sizes as any width and any height and then follow the below auto layout constrains. It will work for you.
First select the view you want to set the auto layout, and then select the pin option from the right bottom corner of your storyboard and then add the constrains as shown in above picture and click button Add 4 constrains
Repeat the process for all views and set the constrains as Fix the top, bottom, left and right constrains of all views except the last button that should be fix from top,left,right and fixed height.
You need to make use of the size class selector in the bottom of the storyboard window.
So for an iPhone 6 or 6 Plus in portrait you would choose a compact width and regular height like this:
And then you would do whatever auto layout stuff for the given device there