I am trying to build a screen similar to twitter/instagram profile page where there is a header section and below that scrollable content.
I have a view controller which has a table view. I wanted to include a header view on top of the table cells. So i dragged and dropped a "View" just above my cell and it works fine. Now i have a label inside this header view and i want the label height and UI view height to adjust automaticlly based on the content length of the label. (If the content is a long string, the number of lines of label should automatically increase and the container view(headerview)'s height should increased based on it's content items property.
I tried to set auto layout on the table(top left right and bottom to the container view(headerview). But then the label is shown in single line, truncated at the very right corner. If i remove the bottom constraint from my constraints, the label appear in multiple lines, but the container view(headerview)'s height is not increased, thus producing an overlap of the label on top of the table below that.
I have the number of lines property set to 0 for the label.
Can anyone share some ideas how to do this ? I am using Xcode 7 and swift 2
There are several approaches for what you want to accomplish. If you do not care if the header scrolls with the cells, the easiest way is to do something like this:
----------------
Header
Label
TableView
----------------
You should pin your header Top,Right,Left.
You should pin your tableView Right,Bottom,Left.
You should pin Header.bottom = TableView.top.
You should pin your Label 4 sides to it's superview(Header).
Set Label numberOfLines = 0
If your header has a fixed width, the label will automatically inherit that width, and setting numberOfLines=0 (a.k.a unlimited number of lines) will make your label increase it's height. Because your label is pinned to it's superView by it's 4 sides (and the header has no fixed height), your header must increase it's height to match the label height.
Hope it helps!!
Related
I have a list with titles coming from data source. The length of the title is unknown and could be one line, two lines and even more... under the title I want to place the name of the author of the post.
I placed the two labels (the title label and the author label inside a View with layout: 'vertical' which places the author label under the title label. But still had to somehow limit the number of rows displayed by the title - I want to have maximum 2 rows. So I've set the height of the subject label.
While setting the height of the label does limit the number of rows displayed, it causes another problem - on rows where the title is 2 lines or more everything looks great. but on rows where the title is only one row, there's now space between that row and the author name - and I want to have the author name right under the label (important thing to notice - the author label has a different font size and color than the title).
If it was just plain old html I would just set max-height css property - but Titanium doesn't have that kind of property on Views/Labels. Is there a way to have maximum height on a View?
There is no such property max-height being supported by Appcelerator for views. But what you can do is, you can listen for the postlayout event for the view and once triggered you can get the rect, to get the height of the view. Now in here you can do your magic. If the height of the view is greater than some value you want, then you can fix it, else let is remain as is.
Do let us know if it works for you. If not, we can try to come up with some other solution.
On Android you can use maxLines on a Label.
For Views and iOS you could do the following. Set the view's height:Ti.UI.SIZE and use bottom to set the minimum space between the views bottom and that of its parent. This only works if the parent has a fixed size.
Listening to post layout on a ListView won't work since you would have to set this on the ListView but don't have a way to access the rect or size property of the ListItem views.
I've just added the numberOfLines in the iOS SDK: https://jira.appcelerator.org/browse/TIMOB-24071
It's called maxLines for Android parity. It really works for Labels inside ListView templates.
In a brand new project, I've added a button as the top component and text field below it. I have them set to fill width horizontally. I then group them into a stackview. At this point, the stackview blows everything out.
I set the stackview constraints to 0 on all four sides. The button takes up all the space. I set a constraint for height of 30 on both objects. Things look normal again.
The problem is that I can't get any vertical space between the button and textfield. How is that done when you're in a stackview?
You can enter the Spacing for the stack view members in the attribute inspector of the stack view.
I am struggling with this stuff for a few days. I am having a view controller in which I have a scroll view and above it a content view. In the content view I am displaying some text from web in a label. I am using a view controller of free form size 600*1000 for my designing purpose.I have given the following constraint to my content view -
1)pinned to the edges of scroll view.
2)content view width equals to superview width.
3)content view height equal to 900.
My scroll view is working perfect.
So now I want that whenever my text increases then my label size would increase thereby increasing the height of my content view automatically. So how to do so. Any answers are most welcome. Thank you.
Set the number of lines for your UILabel to 0.
Add leading, trailing, top and bottom constraints to UILabel.
Set number of lines to 0 does the trick, as the content increases UILabel will automatically adjust the height.
I am looking into taking the plunge and use Auto Layout on an existing app. The interface has a button on the main window. The button changes its title depending on the state of the app. I plan to localize the app.
Since Auto Layout does not know (in the NIB) the length of the various titles that the button will adopt, how can I guarantee that the button will, for each localization, be sized in such a way that it will fit the longest-length title in each localization?
What is the right way to accomplish this? Many thanks.
You don't need to change much. You just add the alignment constraints whatever you added. Now give it width and height constraints and make them greater than equals to the minimum value you wanted. See this.
I have added center horizontal and vertical for alignment. This you can change to any. Now the width is here greater than equals to 42.0 and the height is greater than equals to 21.0 . Now if you just change the text of the button then it will increase its height and width according to that. You just need to call this line just after changing the text.
[self.view layoutIfNeeded];
Now you may have question that you want to limit the width and then increase height. Here is the solution. You give it width less than equals to max width and it will not increase the width more than that. See here.
Here my max width is 200.0. But make sure that if you are adding those layout constraints in iOS and it is a UILabel then than Lines is 0 and if it is a UIButton then the Line Break is Word Wrap or Character Wrap, but in OS X increasing height of NSButton depends on your button type.
If you have given constraints to your button, just remove it's fixed width constraint, button will automatically fit as per text's width.
My NSTableView has variable height rows. The rows correctly resize after an edit of a cell has been completed, and during/after resizing the column/table. The Row also correctly resizes while a user is typing into the text cell.
However, the cell itself does NOT resize during editing to match the height of the row. Does anyone have any ideas on this? In this screenshot one end-edit has occurred already (which is why the text area is larger than 1 line) but there is currently enough text in the cell to account for about 5 lines, thus the height of the row is not matching what should be displayed.
Both the textview and the cell have to have their autoresize set if you want them to automatically scale.
It looks like the cells in the Tag Name column are properly set to resize but that either the cell or the textview in the value column has not been. Check the sittings in Interface Builder.