I created a brand new Swift Cocoa Macos project, and placed a NSTableView. I auto layouted it, and then ran the app, and got this result: https://i.stack.imgur.com/bQmQD.png
If I shrink the window down just a tiny bit more, then the horizontal scroll bar will appear.
Steps to reproduce using XCode 12:
Create a new Macos App using storyboards
Add a NSTableView, and in interface builder place it on the top left corner. Proceed to make it the same size of the window.
Add 4 constraints on all sides of the NSTableView so that it is the same size as your window, even if you resize the window.
Add 3 more columns and name your columns whatever you want.
Proceed to run the app, shrink the right border of the window, and you can see, you can shrink your window past the point of last column, so it's possible that the last column is obstructed and the H-Scrollbar is still not visible. It only shows when you shrink the window even more.
Desired Behavior:
As soon as I resize the window so it can now no longer fit all the columns, the horizontal scroll bar appears.
Is there anyway to solve this, like a hidden setting?
I've tried reproducing this 4 times, and I was successful.
The fix is to set Column Sizing of your table view to your desired settings.
Related
I have an NSTableView with only one column. When I change the Windows size, the TableView sticks to the Windows borders, as it should:
ScreenShot Small
However, when I expand the windows frame to much (for example, when using full screen) suddenly a second column appears:
ScreenShot FullScreen
I have no idea, why this is happening. I can't expand the first cell manually using this little resize indicator, it seems like the cell inside the tableview just wouldn't be able to grow more...
Here is a picture of the TableViews Attributes Inspector:
ScreenShot AttributeInspector
I didn't find any constraints or width settings that would explain this.
I would be really greatful for any kind of help.
Try changing the column sizing of tableView to Uniform in attributes inspector.
Also in your size inspector, check and adjust maximum width for the column depending on your window max allowable width.
I'm starting to study Swift with the help of this Apple's guide : https://itunes.apple.com/it/book/app-development-with-swift/id1219117996?mt=11
Now i am stuck on a small problem that i would like to understand how to solve, but from the guide it is not very clear.
I'm at the 398 page : “Guided Project: Personality Quiz”.
Initially i have to place 4 labels in all the corners of the view controller.
From the guide:
“To hold your emoji in their respective corners on all screen sizes,
you'll need to add two constraints to each label. Begin by selecting
the top-left label and clicking the Add New Constraints button. Enable
the top and leading constraints and set them both to 0 pixels,
ensuring there's no space between the edges of the label and the
margins of the view. By default, the top of a view has a 20-pixel
margin, and the left and right sides have 16 pixels of margin. So when
you enter 0 pixels, you're actually telling the label to position
itself 20 pixels from the top and 16 pixels from the left edge of the
view. Add these two constraints”
So, following the guide, i place the first label in the upper left corner, and add the two constraints
And this is the result. The label is aligned to the Safe Area and not to the view margins.
Looking to another project (not mine), i think the two constraints that i need are these (or something similar):
I'd describe that as a bug in Xcode. You asked for margin-relative constraints and you didn't get them. That's not very nice!
You'll just have to edit the constraints afterward. In your final screen shot, double click a constraint. Use the pop-up menu to change the Safe Area constraint to a Superview constraint. Then choose from the menu again to check Relative to Margin. Then you might have to fix the Constant value. Do that for the other constraint too.
Either that or just don't use the constraint popover to begin with. Instead, draw your constraint by control-dragging from the button and use the HUD that appears. Hold Option in the HUD to get superview margin constraints.
EDIT Ooooh, here's another workaround; before you form your constraints, hide the safe area layout guides (uncheck the 4th checkbox in this screen shot):
Now the constraint popover works correctly.
I'm working with an NSOutlineView on a macOS app and it provides disclosure triangles for items that can be expanded.
I'm also creating custom NSTableCellView items rather than using basic cell items. This allows me to create the cell how I want visually.
My issue is that when they're displayed, the disclosure triangle on the left is not centered vertically.
Notice how the disclosure triangles are not aligned properly. They're a bit lower than they should be. If you scroll away and come back, sometimes, they automatically align themselves correctly. Has anyone been able to fix this issue before?
For what it's worth, I'm using the following code as well for the cells.
self.outlineView.rowHeight = CGFloat(integerLiteral: 66)
self.outlineView.usesAutomaticRowHeights = true
It's hard to figure out what the problem is without seeing how you've set up your project, but I'm going to give it shot.
First, when usesAutomaticRowHeights is set to true, the outline view uses Auto Layout to position the cell views. Thus, you need to be utilizing constraints in your Storyboard or Nib file, or things will behave strangely (see: your picture). If I had to guess, the prototype cell view you set up in Interface Builder is having its autoresizingMask translated into Auto Layout constraints (which, generally, causes a boatload of problems).
What I would do is this:
Open up the Storyboard or Nib document containing the outline view.
Locate the prototype NSTableCellView instance that contains the street name text field in the Document Outline to the left of the canvas. (If you don't see the Document Outline, you can open it by clicking the item at Editor » Show Document Outline in the main menu).
Next, see if you have any constraints in place. If you do, remove them by selecting Editor » Resolve Auto Layout Issues » Clear Constraints under the menu item "section" that's titled All Views in ${YOUR_SCENE}.
Now, depending on what you're going for, there are different ways to go about setting up constraints, but here's what I would suggest. Assuming you want the street name to be centered vertically with the disclosure triangle, I would add a vertical constraint between the text field and its parent cell view like so:
With the text field selected in the Document Outline, click the Align icon in the lower right-hand corner of Interface Builder's main canvas area (see image).
In the popover that appears, check the checkbox next to Vertically in Container.
In the text field on the right side of the popover, enter a value of “0”.
Finally, click the “Add 1 Constraint” button.
You’ll probably see a red error (or yellow warning) sign show up, as the view has now opted into Auto Layout, but it only has a metric for its vertical position. So we now need to add some constraints to describe where the text field should be positioned on the x axis. Like before, we’ll define the constraints using the popover buttons on the lower right-hand side of the canvas:
Click the Add New Constraints button (the one to the right of the Align button).
On the diagram at the top of the popover, click the faint red lines on the left and right side of the white rectangle. This is telling Interface Builder we want to add leading and trailing constraints.
Now, enter the desired padding you want on each side of the text field. In the example image, I went with “4” points on both sides, but obviously, you can use whatever value(s) you think works best with your layout.
Finally, click the “Add 2 Constraints” button.
Any warning(s) that were present should now disappear, as we've added enough constraints to describe the position of the text field. In theory, you should now be able to build and run your project, and the text fields should be aligned with the disclosure triangles. With that said, there are plenty of other reasons a layout can get finicky, and considering usesAutomaticRowHeights is a new API in macOS High Sierra (and Steve Jobs is no longer there to beat it into Apple developers to make everything Just Work™), there could be issues that I'm unaware of.
Alternatively, you can set usesAutomaticRowHeights to false and have some object (e.g. a view controller, a NSObject subclass, etc.) conform to the NSOutlineViewDelegate protocol and implement the outlineView(_:heightOfRowByItem:) method to return any arbitrary height you want for different rows. The nice thing about sizing rows this way is that you can allow certain rows to be larger or smaller, depending on the role of the corresponding item. There are lots of tutorials on this, so I won't regurgitate a half-baked explanation here, but feel free to Google “Conforming to NSOutlineViewDelegate protocol” for more info.
Anyway, try the steps above, and see if they do anything for you, and if they don't, let me know. I can go as deep into the rabbit hole with you as you need, so just ask. Good luck!
For those like me who stumbled upon this issue many years later, here's the fix that worked for me, and requires a lot less work.
NSOutlineView has a function frameOfOutlineCell(atRow:) and the documentation states: You can override this method in a subclass to return a custom frame for the outline button cell
You can override the method in order to provide a frame that's actually in the vertical center of the row. And an important point that I learned from trial and error, is that you don't even need to provide that updated frame. Not sure if this is a bug or what, but for me, just calling super.frameOfOutlineCell(atRow: row) in the function override was enough to make the disclosure indicator appear in the correct location.
So my subclass of NSOutlineView is this:
class MyOutlineView: NSOutlineView {
override func frameOfOutlineCell(atRow row: Int) -> NSRect {
super.frameOfOutlineCell(atRow: row)
}
}
That's all. Hopefully that works for others as well!
I am trying to use the auto size classes from the storyboard on xcode 7 to position UI elements in a controller. The problem that I'm running into is that when I try to use the "Add missing constraints" function (located at the bottom right corner of the console), it positions my UI elements correctly except for the last elements (pictures describe better). The first image below shows the storyboard file where I just want 3 buttons (stacked above eachother) to be the same width and length to be on the top right corner of any screen.
However, when I add constraints and run the simulations, it seems like the top two buttons are positioned correctly with the correct length and width but the third button is out of place (image below).
So my question is, am I forgetting a step to make all buttons position themselves? Or should I try to convert everything to a percentage and place UI elements based on the percentage of the screen (if so, how would I go about doing that)?
I've also tried adding another blank button (removing the button label) underneath the 3rd button and adding constraints like that but it didn't work for me. Let me know if you have any suggestions, thanks!
In you case, Autolayout the constraints you need to give to UIButton is 4 constrains.
Leading
Trailing
Width
Height
If you miss any of them, then surely you will get an error. So, what's your error is?
To the third UIButton, you have not given the height, while to the above two buttons you have given.
So, just remove the bottom constraint of UIButton and give the equal height to above UIButton.
FYI, never use Add Missing Constraints without any confirmation from your side.
Update:
Check this video to remove trailing or leading margin:
http://sendvid.com/1h8deg18
You can actually see the solution in action if you use the Preview screen while setting up your auto layout constraints. I just created a similar view and buttons and stepped through the process. I coloured the buttons and named them to make things obvious.
I added the three buttons. At this point, none of the buttons show up in the preview.
I then setup the auto layout constraints for Button1. If you want the buttons anchored to the top right, then you don't need to worry about the leading constraint. You need width, height, top, and trailing.
Now Button1 will snap to it's position in the top right corner of the preview screen.
Now do the same thing for Button2. Set width, height, top (vertical space to Button1), and trailing.
Button2 will now snap into place in the preview.
Now the same thing again for Button3. You anchored the first button to the top right of the screen. Then Button2 to the bottom of Button1 and the right edge of the screen. Then again for Button3. You could also align the edges of the 2nd and 3rd buttons, if you prefer that to trailing space.
Now you'll see in the preview that your buttons are correctly positioned, regardless of device.
As long as you specify height and width for each button, you don't need to worry about the left edge or the bottom edge of the screen at all. They each know to "stick" to the top right and they know what size to be.
** Note: If you're not familiar with the "Preview" option...
With your storyboard open, hold Option and select storyboard again to get another copy of the storyboard on the right side. Highlight the view controller you are interested in on the left side. On the right side, select the Preview option as shown below.
Now you have your storyboard and the preview side by side, so you can see the exact impact of any auto layout changes you make. You can also add or remove devices to the preview.
I have attempted to search for AutoLayout, Contraints and several other items, but I can't seem to find an easy answer to what appears to be a simple issue. Below are two screenshots. The first one is a 4" iPhone in Storyboard, the second is the 3.5".
At the bottom, I have a "UIView" that sits on top of all the other layers and will only pop-up when I hit a "share" button. See my problem? I want to maintain the same size for the UIView on both the 3.5" and 4". As you can see, it grows and doesn't look as good on the 4" screen. What settings need adjusted in order to make this happen. I know it's going to be a constraint setting.
Simply select the black top UIView, and in the IB window add a height constraint.
To do so, search for "Pin" menu in the bottom right corner of the window, and select "Pin Height".
This tells Xcode that you want your view to always keep the same height. Note that this will probably make one of the previous constraints of your view useless (in my case I deleted the "Top Space" one).