I have a couple of NSScrollViews inside an NSPopover in my app. I want to create a Safari-like blur with scrolled content on the top. However I can't find any solution, since it is an NSPopover and I cannot set the style mask. I tried adding a blank row with the height of the header and positioning the header (NSVisualEffectView) over the NSScrollView (table view), and this method works but the scroller goes under the header. So is there a "right way" to do it?
NSScrollView provides a nice method called addFloatingSubview:forAxis:. It should be possible to add the NSVisualEffectsView as a subview of the scroll view then. By using this method, the scroller stays above the header.
To get the scroller stop before the effects view, you can modify the contentInsets property of NSScrollView.
Related
Recently I'm testing to do a very complicated view in xcode using nothing but scrollview and programatically added imgviews. Like this
What I did is, I put a UIView called contentview in a scrollview and I then add a lots of ImageViews in the contentview. The real thing is much much complicated than the illustration so I can't use tableview. Sorry for the poor illustration but I think you will get the idea.
Everything is fine until I tried to add the last constraint in code, which marked red in the picture. When I did it, it breaks the entire chain of constraint.
In another word, this is working
V:|-[view1(30)]-[view2(30)]-[view3(30)]
This is not
V:|-[view1(30)]-[view2(30)]-[view3(30)]-|
And btw, what is the proper way to do it anyway? I tried to add imageviews directly into the scrollview itself but I can't make the view to use autolayout like this
H:|-[view]-| The superview here is a scrollview
The result, this view will be very narrow in width. I guess scrollview doesn't have a width value or sth? that's my guessing. That's why I added a contentview as a holder for all the imageviews.
Try this, it will work. - http://natashatherobot.com/ios-autolayout-scrollview/
To summarize -
Add scroll view to main view.
Add a UIView (lets call it content view) to scroll view.
Now add all your views to the above UIView.
For each of them set the constraints so as the separation on all sides is 0. And finally add equal height and equal width constraints between the content view and the main view.
Ok, finally I did my own work.
The key to make scrollview and contentview and everythin else inside work automatically using nothing but autolayout is this.
1, Manually add scrollview to self.view, and a contentview to scrollview. Set both scrollview and contentview to setTranslatesAutoresizingMaskIntoConstraints(false)
2, set scrollview to H:|[scrollview]| and V:|[scrollview]|, set contentview to be H:|[contentview]| and V:|[contentview]|
3, Now try to add Views to content view and set their constraints to the contentview. You should see that when the views are larger than the current window size, the scrollview started to scroll. IE, this setting will automatically set the scrollview.contentSize using autolayout
I've got a custom NSTableHeaderView of custom NSTableHeaderCell objects that draw a custom header. The problem I'm having is that when the NSScroller bars show up, the header drawn above the scroller is the default, not my custom drawing.
Turns out the view that controls this section (over the scroller, right side of header) is called cornerView and the NSTableView has a -setCornerView:(NSView *)view method to set it. I fixed my problem by subclassing NSView and using custom drawing to draw a corner image into the view, then setting that subclass using the previously mentioned method.
Mac Mojave Left Corner View
Recently when providing support for one of my application on Mac Mojave I find out the culprit behind the top left corner view of table view. this can also be removed if we will set the corner view from xib like below.
This issue produces if Automatically Hide Scroller property is set to YES and no corner view has been set
Solution:
In my custom drawn window I have a NSTextView under which I'd like to have NSScrollView separated by empty space. That's how I've set it up in xib.
In interface builder it looks fine, with nice space between the two of them
But when I run the program, the scroll view gets moves upwards, actually covering the text view:
But when I disable vertical autoresize of the scroll view, everything is working as it should.
text view and scroll view are under NSView so they are siblings to each other.
Most probably it was shortcoming of the system as the scroll view was being completely hidden and so then it was probably moved.
I've worked it out by subclassing NSScrollView and overriding
- (void)resizeWithOldSuperviewSize:(NSSize)oldSize_;
So now I can position the scroll view exactly as I wish.
I have a NSView as the documentView for a NSScrollView. I also have a NSImageView as a subview of the NSView. The image dynamically changes size so the scroll bars become active/inactive at various times. Once the image has changed, I'd like to scroll to a certain point on the image. From within the NSView's drawRect: method, I call
[[myScrollView contentView] scrollToPoint: myPoint];
The scroll bars update and the image appears as I'd like, but as soon as the image is scrolled, a double image appears or parts of the image get cut off. Any help would be appreciated. Thank you.
Sounds like you might want to turn off the "Copy On Scroll" behavior option of the NSScrollView either in Interface Builder or programmatically.
From Scroll View Programming Guide for Mac OS X: How Scrolling Works:
The NSClipView class provides low-level scrolling support through the
scrollToPoint: method. This method translates the origin of the
content view’s bounds rectangle and optimizes redisplay by copying as
much of the rendered document view as remains visible, only asking the
document view to draw newly exposed regions. This usually improves
scrolling performance but may not always be appropriate. You can turn
this behavior off using the NSClipView method setCopiesOnScroll:
passing NO as the parameter. If you do leave copy-on-scroll active, be
sure to scroll the document view programmatically using the NSView
method scrollPoint: method rather than translateOriginToPoint:.
I've created a custom scroller for my textview (initiating it in the awakeFromNib method of the scrollview) and now I want to let the user chose if he wants to show the scrollbar on application startup. The problem is that the scroller always appears even if I hide it immediately after I created it and set it to be the scroller of the scrollview. The weird thing is that trying to hide the scroller after an event has been triggered (for example by clicking on a checkbox in the preferences) the scroller properly hides and shows. What I'm I doing wrong? Any help is appreciated!
The weird thing is that before adding the custom scroller to the scrollview I have to use setHasVerticalScroller:YES, otherwise I can't scroll using the two-fingers scroll gesture. Then, if the user doesn't want the scrollbar to be shown I have to use setHasVerticalScroller:NO in the document's windowControllerDidLoadNib method, using it just after having added the scrollbar in the scrollview's awakeFromNib method won't work. Well, at least now it seems to work!
I've always used IB to set up scrollbars and then used the following line if I want to suppress one of them:
[self.aScrollView setHasHorizontalScroller:NO]; // so only the vertical scrollbar is active
Try using that line in awakeFromNib, later setting it to YES if user chooses, rather than using the "hidden" property.
P.S. An NSTextView added in IB is always embedded in an NSScrollView, and it's the scrollview that governs the scrollbars. So if the above doesn't work, try calling setHasWhateverScroller on the superview of your textview:
[[[aTextView superview] superview] setHasHorizontalScroller:NO];
If you get an "unrecognized selector" error, then try explicitly casting the superview to NSScrollView (which will work only if the superview really is an instance of NSScrollView):
[(NSScrollView *)[[aTextView superview] superview] setHasHorizontalScroller:NO];