I have a view inside constraint layout. First I want to fade in the view then move the view and then fade out
I need multiple constraint sets for this which are applied one after another . how to do this?
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I've come up against a problem I cannot sort out. I have a nib file where I added a table view and a UISearchbar with a scope bar. Everything was working perfectly until I added constraints to all the views (tableview, searchbar, a few labels and buttons). Since that moment, I cannot see the scope bar anymore. It seems to be hidden behind the searchbar because I can see a kind of blue surrounding the search area where text is entered (see below):
Does anyone have already been facing this problem?
EDIT:
This is the image with the constraints mentioned as a possible issue:
There might be either of below two constraint causing the issue.
Height constraint to the searchBar - you can resolve this by deleting the height constraint
OR
If your tableview has top constraint to the superview you will need to either delete it or you will not increase it till you see the scope bar.
I have established constraints to like buttons, timestamp button, etc. below bottom of textfield a certain distance. You can see the issue in the image; if the textfield doesn't have enough letters, they overlap, how do I fix this? Here's a link to image:
https://docs.google.com/document/d/1_btZBSsL3SQA1IulFTasMFBghF_2hJYzrFlbuQPkKrM/edit?usp=sharing
The problem is setting the constraints with respect to the bottom of textfield. That bottom moves depending on the amount of text the field has and if that bottom position is above the bottom position of the icon to the left of the text field, you'll get the overlap you see. The solution, you might think, is to set the constraints with respect to the bottom of the icon but that won't work when the text field has a lot of text. You should try that just to understand the problem more clearly.
The actual solution is to set this particular constraint programmatically, as text is entered into the text field. You want to set that constraint with respect to the bottom of the view (icon or text field) that has the lowest bottom. That way, with little text, the constraint is set relative to the bottom of the icon but when there's enough text for the text field to vertically extend below the icon, the constraint is set relative to the text field instead.
Where would you set this constraint programmatically? Probably in the textField:shouldChangeCharactersInRange:replacementString: delegate method of UITextField.
Alternatively - and perhaps a better solution - you could have a view containing the icon and the text field and set the constraint in question with respect to the bottom of the container view. That way you can set the constraint in IB rather than have to do it programmatically.
To clarify my answer, after the discussion in the comments below, here's a picture of what I mean by having container views and setting constraints between them to avoid the observed overlap.
Set appropriate constraints within each of the container views then set constraints between the container views and between them and the cell content view (I'm assuming, from your picture, that you have all of this in a table view so you have some template table view cell).
I have a simple view with a few labels, textfields and a big NSTextField that spans across the remaining interface.
I can setup auto layout so that the text field spans over the width of the window, but as soon as I add the last contraint Bottom space to container to its super view the window can no longer be resized.
These are my constraints:
So currently I have to omit this constraint and I end up with the following result:
See Screenshot
You need to fiddle with priorities on the constraints. Especially consider doing this on the height constraint.
I am updating an application for iOS 7 and have decided to use Auto Layout.
When I try to add constraints to any of the elements in the below screenshot :
i.e. View Controller, Table View, View, Table View Section, Table View Cell, Content View, Label.
I am unable do to so, as no item in the Add New Constraints panel ( as seen below ) is interactive.
(Apart from the Update Frames Item)
In my attempts to resolve this issue I have researched that
"When using Auto Layout you may no longer set the frame of a view directly. This line either has no effect, or it may directly interfere with what Auto Layout is doing."
also
"When setting the contentSize of a scrollview with Auto Layout, the content size is automatically derived from the constraints that you set on its child views."
The problem is still there when I update the ViewContoller code to accommodate this advice.
I had a similar issue. I was able to add constraints for items on a Table View Cell - Content View (e.g. UILabel, UIImageView), once I switched the Table View Cell Style to Custom.
If I added images or UILabels on top of a default Table View Cell type (e.g. Subtitle), I could position them on the Content View, but couldn't set constraints on them.
Changing to Custom Table View Cell Style was the solution for me.
To set the constraints you need to select the items and then set the constraints with either the constraints menu or with ctrl+drag.
However, there is no way to set constraints for a tableViewController as it is a already completely set up.
There might be set Autoresizing Mask as layout in Size inspector.
Try switching it to Constraints:
I drag a tab view into my custom view, and set its frame. Xcode automatically generate several NSLayoutConstraint objects those will decide its frame during auto-layout.
As shown above, a constraint which indicates the distance between right edge of the tab view and the RIGHT edge of its super view.
However, I do not want a constraint like this. What I want is a constraint which indecates the distance between the right edge of the tab view and the LEFT edge of its suber view. OR, the width of the tab view itself.
How should I do?
BTW, I tried delete the constraint, but Xcode generated this constraint back immediately. Therefore I could not add one (and actually I do not know how to add one, either).
There is a minimum number of constraints required on each axis of the view, hence you should add a new constraint first before deleting existing one to make sure Xcode understands how to layout the views properly.
Try to add a new constraint by clicking a view and then click on the middle button at the bottom right options in your screenshot:
go through following link, which explain auto layout..
http://www.raywenderlich.com/20881/beginning-auto-layout-part-1-of-2