The issue I am having is this:
1) Some of the preview thumbnails do not show, but displays the full picture when clicked as it's meant to when clicked. This is the main code that implements the thumbnails:
` NSString *imageToLoad = [NSString stringWithFormat:#"%d.JPG", indexPath.row];
cell.image.image = [UIImage imageNamed:imageToLoad];
return cell;`
So the '#"%d.JPG",' receives the files as need.
2) Also, I've tried in the properties panel to change the spacings so the pictures are not right against the edge, seems to have no effect, any thoughts on this?
Many thanks :)
To answer your first question, you can use placeholder image to show.
To answer your second question this UICollectionViewFlowLayoutDelegate method will help you..
- (CGFloat)collectionView:(PSUICollectionView *)collectionView layout:(PSUICollectionViewLayout*)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section
{
return 10; // This is the minimum inter item spacing, can be more
}
One more if you need more space to arrange your cells adjust the edgeInsets also.
Related
When I am displaying some view in UIPopoverPresentationController and presenting it as popover
popoverCon?.modalPresentationStyle = UIModalPresentationStyle.popover
the content have moved upward toward and a some part is being display in the arrow.
Further I had border around the popover
popoverCon?.view.layer.borderColor = .orange
popoverCon?.view.layer.borderWidth = 1.0;
popoverCon?.view.layer.cornerRadius = 10.0;
popoverCon?.view.layer.masksToBounds = false;
it is not showing toward the part where arrow is but it displays a little of the border line in the tip of the arrow.
This was working fine until iOS 12 but in iOS 13 this issue is coming.
Any suggestions on how I can solve this?
The top of my tableView content was cut off by the arrow. This is how I fixed it in my case (code inserted in my tableViewController Swift file):
override func viewSafeAreaInsetsDidChange() {
if #available(iOS 11.0, *) {
super.viewSafeAreaInsetsDidChange()
self.tableView.contentInset = UIEdgeInsets(top: self.tableView.safeAreaInsets.top, left: 0, bottom: 0, right: 0)
}
}
My solution in Obj-C, for those who need an obj-c solution.
I had previously only popovercontroller, that was creating the error like shown in the question. I renamed it to childController for clarity and created a containing popoverController to make the solution given by #SaintMSent work in my situation of only one view originally. Also used https://stackoverflow.com/a/47076040/2148757 solution and https://useyourloaf.com/blog/self-sizing-child-views/ to resize appropriately since all of my childControllers set the preferred content size frequently.
//Create container popover controller and add child to it
UIViewController* popoverController = [[MyParentPopoverController alloc] init];
[popoverController.view addSubview:childController.view];
[popoverController addChildViewController:childController];
[popoverController setPreferredContentSize:childController.preferredContentSize];
//set popover settings on container
popoverController.modalPresentationStyle = UIModalPresentationPopover;
popoverController.popoverPresentationController.sourceRect = sourceRect;
popoverController.popoverPresentationController.sourceView = buttonView;
popoverController.popoverPresentationController.permittedArrowDirections = direction;
//Fix ios13 'bug' that Apple claims is a feature
UILayoutGuide* guide = popoverController.view.safeAreaLayoutGuide;
childController.view.translatesAutoresizingMaskIntoConstraints = NO;
[childController.view.leadingAnchor constraintEqualToAnchor:guide.leadingAnchor].active = YES;
[childController.view.trailingAnchor constraintEqualToAnchor:guide.trailingAnchor].active = YES;
[childController.view.topAnchor constraintEqualToAnchor:guide.topAnchor].active = YES;
[childController.view.bottomAnchor constraintEqualToAnchor:guide.bottomAnchor].active = YES;
[popoverController.view layoutIfNeeded];
//Show the popover
...
#interface MyParentPopoverController : UIViewController
#end
#implementation MyParentPopoverController
-(void)preferredContentSizeDidChangeForChildContentContainer:(id <UIContentContainer>)container {
[super preferredContentSizeDidChangeForChildContentContainer:container];
[self setPreferredContentSize:container.preferredContentSize];
}
#end
Note: I didn't check for ios11 compatibility because my user base is restricted to not use it.
It is definitely a feature, they want you to use safe area since iOS 11, actually, but it seems now they want to force you to use it
Had the same problem as you, this worked for me
https://useyourloaf.com/blog/safe-area-layout-guide/
Definitely a bug. When you have a situation where you use UIPopoverArrowDirectionAny you will see that the problem only exists when the arrow is at the top or left of the popover and not when the arrow appears at the right or the bottom of the popover. If you make adjustments in your code to compensate it will work if you use UIPopoverArrowDirectionUp or UIPopoverArrowDirectionLeft but will not display correctly using that adjustment when using UIPopoverArrowDirectionAny and the popup appears above or to the right of the target rectangle.
I don't have an 'answer' yet, but I have identified what's going on and why it's so hard to fix.
ios13 UIPopoverViewController showing UITableViewController - Safe Area problems / Missing parts of table
Basically, any UITableView that has headers or footers is going to be broken in iOS 13 unless there's some way to alter the _UITableViewHeaderFooterViewBackground
That is notoriously problematic and doesn't play nicely with Auto-Layout - it's been known about for years, but Apple have never fixed it or made it easier to deal with and more publicly known.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=video&cd=1&cad=rja&uact=8&ved=0ahUKEwibouuozfvkAhVCXRUIHVGsBegQtwIIKjAA&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DajsCY8SjJ1Y&usg=AOvVaw3_U_jy9EWH2dJrM8p-XhDQ
https://spin.atomicobject.com/2016/10/12/auto-layout-uitableview/
I'm unable to push my app to the App Store until I get this sorted.. I hope someone can identify how to manipulate this view so that it stops pushing the boundaries of the table out of whack with AutoLayout which causes this safe area intrusion.
Searching on the internet I got help from following link
Twitter
so I had to add safe area and manage my views accordingly
CGFloat topPadding = 0.0;
if (#available(iOS 11.0, *)) {
topPadding = self.view.safeAreaLayoutGuide.layoutFrame.origin.y;
}
Swift:
var topPadding: CGFloat = 0.0
if #available(iOS 11.0, *) {
topPadding = self.view.safeAreaLayoutGuide.layoutFrame.origin.y
}
but I haven't got solution to the border problem of mine yet.
Edit:
Temporarily I did solved the border problem by creating an invisible view on popover and giving it same frame as safe area and drawing its border.
You should use constraints. And also pay attention to topAnchor. It must be safeAreaLayoutGuide.topAnchor. In my case, it works correctly. For example:
[NSLayoutConstraint activateConstraints:#[
[toolbar.leftAnchor constraintEqualToAnchor:self.view.leftAnchor],
[toolbar.rightAnchor constraintEqualToAnchor:self.view.rightAnchor],
[toolbar.topAnchor constraintEqualToAnchor:self.view.safeAreaLayoutGuide.topAnchor],
[toolbar.heightAnchor constraintEqualToConstant:50]
]];
Embed the contents of the popover in another view with "safe area relative margins" on. This should have -21,-21 as the origin. Turn off vertical and horizontal auto resizing. Seems to work, although you lose auto-stretching.
Setup your popover's content UIViewController like such:
NSLayoutConstraint.activate([
myContentView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor),
myContentView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor),
myContentView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor),
myContentView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor)
])
i´ve got a problem with tableview.
i have a list of audio track and i check every track if this track actually exists. if not, i set a deleted image over the artwork in cells image view.
//SET DELETED IMAGE IF TRACK NOT EXISTS
if (!trackExists && cell.trackImageView.subviews.count < 1) {
UIImageView *deletedImageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 60, 60)];
deletedImageView.image = [self resizeImageWithImage:[UIImage imageNamed:#"cellDeletedImage"] scaledToSize:CGSizeMake(60, 60)];
[cell.trackImageView addSubview:deletedImageView];
}
sometimes when i reload the tableview, the deleted image is on existing tracks. i know there are more efficient ways to do this, but i tried and tried and i ended up here.
also i logged this method, and it puts the deleted image even when there is no log.
Chances are, that if you're using table views as they are designed, that you are reusing cells. Does this happen when you scroll the table up and down a few times too? Does one cell that has the deleted image suddenly not have it if you scroll again?
It sounds like the reused cell still has a reference to that deleted image.
It's not quite clear where you add that image view, but I suggest that you move that code to the custom class for your table view cell (or create one if it doesn't exist). Subsequently in prepareForReuse, ensure that the image view is removed or hidden.
#class TrackTableViewCell : UITableViewCell
{
- (void) prepareForReuse
{
//Remove / hide image view
}
- (void) setAsDeleted
{
//Add / show image view
}
}
(Forgive objective-c syntax errors! I've been using Swift for a while now.)
Is it possible to hide the separator between the cells of an UITableView?
But it should configure-able for each cell seperate (so not for the whole TableView).
What I already tried out is:
UIView *backView = [[[UIView alloc] initWithFrame:CGRectZero] autorelease];
backView.backgroundColor = UIColorFromRGB(CELL_COLOR_DEFAULT);
cell.backgroundView = backView;
The only problem here is, that on the left and right side is also no border, but here I would need it.
Thanks
NG
So are you trying to have a border around the entire cell or just the separator?
You could try adding something like
cell.layer.borderColor = [[UIColor blackColor]CGColor];
cell.layer.borderWidth = 10.0f;
to your cellForRowAtIndexPath method (you can decide whether to display the border for a given cell than as well).
I have implemented a view-based NSOutlineView in my project. I am using floating group rows. Now, I would like to have this NSOutlineView look basically like the Finder list-view (CMD-2) when it is in the "arranged-by" layout (e.g. "by kind": CTRL-CMD-2). That means, the top-most group row should display the column titles and as soon as the next lower group row is starting to nudge the previous one out of the view, the column titles fade in on the second group row (I hope this makes sense).
Is there any out-of-the-box way to achieve this? So far I have successfully subclassed NSTableCellView to show the columns' titles, however, I cannot get the fade-in to work as I cannot seem to find out the position of the group row in relation to the floating one above it.
Regards,
Michael
I've found a possible way to achieve what I want. In my custom NSTableCellView's drawRect: method, it's of course possibly in a nasty way to find out the view's position relative to the enclosing NSClipView. The relevant code:
- (void)drawRect:(NSRect)dirtyRect {
// _isGroupView is a member variable which has to be set previously
// (usually in setObjectValue:) in order for us to know if we're a
// group row or not.
if (_isGroupView) {
// This is the nasty party:
NSClipView *clipView = (NSClipView*)self.superview.superview.superview;
if (![clipView isKindOfClass:[NSClipView class]]) {
NSLog(#"Error: something is wrong with the scrollbar view hierarchy.");
return;
}
NSRect clipRect = [clipView documentVisibleRect];
CGFloat distanceToTop = self.superview.frame.origin.y - clipRect.origin.y;
if (self.superview.frame.origin.y - clipRect.origin.y < self.frame.size.height) {
// This means, that this NSTableCellView is currently pushing the
// view above it out of the frame.
CGFloat alpha = distanceToTop / self.frame.size.height;
NSColor *blendColor = [[NSColor blackColor] blendedColorWithFraction:alpha ofColor:[NSColor whiteColor]];
// ...
// do stuff with blendColor
// ...
// blendColor should now be the appropriate color for the wanted
// "fade in" effect.
//
}
}
}
I hope this makes sense ;-). Any tips are still appreciated!
Cheers,
Michael
Today I have a question that sprouted off of this one: Database Results in Cocoa. It's regarding using the data that was returned by a database to create a certain number of questions. I am using a form of the following code (this was posted in the question).
NSMutableDictionary * interfaceElements = [[NSMutableDictionary alloc] init];
for (NSInteger i = 0; i < numberOfTextFields; ++i) {
//this is just to make a frame that's indented 10px
//and has 10px between it and the previous NSTextField (or window edge)
NSRect frame = NSMakeRect(10, (i*22 + (i+1)*10), 100, 22);
NSTextField * newField = [[NSTextField alloc] initWithFrame:frame];
//configure newField appropriately
[[myWindow contentView] addSubview:newField];
[interfaceElements setObject:newField forKey:#"someUniqueIdentifier"];
[newField release];
}
However, now when I attempt to use IFVerticallyExpandingTextfield (from http://www.cocoadev.com/index.pl?IFVerticallyExpandingTextField), or create any large amount of text, it simply goes over the other drawn content. I looked into using setAutosizingMask: on the object, but it has not worked so far.
Thanks for any help.
EDIT: What I want the effect to look like is called "Correct TextField" and what happens is called "StackOverflow Sample" - http://www.mediafire.com/?sharekey=bd476ea483deded875a4fc82078ae6c8e04e75f6e8ebb871.
EDIT 2: And if no one knows how to use this IFVerticallyExpandingTextfield class, would anyone know if there is another way to accomplish the effect?
Do you mean this?
http://developer.apple.com/documentation/Cocoa/Conceptual/CocoaDrawingGuide/GraphicsContexts/GraphicsContexts.html
Your question is not very clear to me but this might help ^^^.
Look at 'Modifying the Current Graphics State' on that page.
What about just exactly copying the code from the 'Correct textfield' example and use it in your application? Or start your application from the 'Correct texfield' example.
Also
A comment on http://www.cocoadev.com/index.pl?IFVerticallyExpandingTextField says:
Give it a try! You should be able to
throw this into a project, read the
files in Interface Builder, and use
the custom class pane to make an
NSTextField into an
IFVerticallyExpandingTextField. You'll
need to set the layout and
linebreaking attributes for word
wrapping for this to work.
Although expansion should work
properly when the textfield is
embedded in a subview, I'm having some
trouble dealing with NSScrollViews.
The field expands into the
scrollview's content view, but none of
the controls on the scrollbar appear.
Some help here would be appreciated.