This problem didn't exist on xCode 5 even with ios8.
The green square have to be in the red square cause the greenView is a subview of the red view. But built with xCode6 the position of the greenView is not relative to its parent.
- (void)viewDidLoad {
[super viewDidLoad];
/**** 1 - REDVIEW, THE CONTAINER *****/
UIView *redView = [UIView new];
redView.backgroundColor = [UIColor redColor];
redView.translatesAutoresizingMaskIntoConstraints = NO;
[self.view addSubview:redView];
UIView *spaceView = [UIView new];
spaceView.translatesAutoresizingMaskIntoConstraints = NO;
[self.view addSubview:spaceView];
NSDictionary *views = #{#"spaceView" : spaceView,
#"redView": redView};
[self.view addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:#"H:|[spaceView]|"
options: 0
metrics:0
views:views]];
[self.view addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:#"V:|[spaceView][redView]|"
options: NSLayoutFormatAlignAllRight | NSLayoutFormatAlignAllLeft
metrics:0
views:views]];
//CENTER VERTICALY
NSLayoutConstraint *constraint = [NSLayoutConstraint
constraintWithItem:redView
attribute:NSLayoutAttributeHeight
relatedBy:NSLayoutRelationEqual
toItem:spaceView
attribute:NSLayoutAttributeHeight
multiplier:1
constant:0];
[self.view addConstraint:constraint];
/**** 1 - GREENBUTTON, IN THE CONTAINER *****/
UIButton *greenButton = [[UIButton alloc] init];
greenButton.backgroundColor = [UIColor greenColor];
greenButton.translatesAutoresizingMaskIntoConstraints = NO;
[greenButton addTarget:self action:nil forControlEvents:UIControlEventTouchUpInside];
[redView addSubview:greenButton];
views = #{#"button" : greenButton};
[redView addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:#"H:|[button(35)]|"
options: 0
metrics:0
views:views]];
}
Where is the trouble?
(you can copy and paste those line to try)
The constraints defined are positioning the greenButton relative to its superview. The issue lies in the missing the vertical position constraint. Also note that the visual syntax you used resulted in conflicting constraints:
0 distance to leading
0 distance to trailing (I removed this one to make it work)
width of 35
superview of witdth != 35;
If you use the following constraints for the greenButton, it will be placed top-left on its parent.
[redView addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:#"H:|[button(35)]"
options: 0
metrics:0
views:views]];
[redView addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:#"V:|[button(35)]"
options:0
metrics:0
views:views]];
Related
I have a UIViewController with a UITableView as well as a UIView that is above the UITableView but aligned to the bottom of the screen. Problem is when the user is on a phone call, the frame settings don't work, and the UIView is pushed below the screen (so it is slightly covered. I'm trying to just align the UIView to the view bottom and simply not getting it to align. I have the constraints defined as below:
[self.view addSubview:self.signupView];
[self.view addSubview:self.tableView];
[self.view bringSubviewToFront:self.signupView];
NSArray *v = [NSLayoutConstraint constraintsWithVisualFormat:#"V:|[_signupView(70)]-0-|"
options:NSLayoutFormatAlignAllBaseline
metrics:nil
views:NSDictionaryOfVariableBindings(_signupView)];
NSArray *h = [NSLayoutConstraint constraintsWithVisualFormat:#"H:|[_signupView]|"
options:NSLayoutFormatAlignAllBottom
metrics:nil
views:NSDictionaryOfVariableBindings(_signupView)];
[self.view addConstraints:h];
[self.view addConstraints:v];
The height of signupView is 70, and it should just be aligned at the bottom of the screen with the width of the entire screen. The above code is putting the view at the top of the view. Is there something i'm missing here? Why is it not aligning with the bottom as I put above? I tried to read the below on this:
http://commandshift.co.uk/blog/2013/01/31/visual-format-language-for-autolayout/
http://makeapppie.com/2014/07/26/the-swift-swift-tutorial-how-to-use-uiviews-with-auto-layout-programmatically/
Use autolayout to set dynamic UIView to match container view
Figured it out.
Here is the below that worked for me:
NSArray *v = [NSLayoutConstraint constraintsWithVisualFormat:#"V:[_signupView(70)]-0-|"
options:NSLayoutFormatAlignAllBaseline
metrics:nil
views:NSDictionaryOfVariableBindings(_signupView)];
NSArray *h = [NSLayoutConstraint constraintsWithVisualFormat:#"H:|[_signupView]|"
options:NSLayoutFormatAlignAllBottom
metrics:nil
views:NSDictionaryOfVariableBindings(_signupView)];
[self.view addConstraints:h];
[self.view addConstraints:v];
I use the KLCPopup library to display a popup in my app.
I have to add 2 buttons horizontally on the bottom of this popup, like the standard iOS UIAlerView. I cannot align this two buttons horizontally.
Here is the result I want:
But here is the result I have:
Here is the code I use to create this popup:
UIView* contentView = [[UIView alloc] init];
contentView.translatesAutoresizingMaskIntoConstraints = NO;
UILabel* dismissLabel = [[UILabel alloc] init];
dismissLabel.translatesAutoresizingMaskIntoConstraints = NO;
dismissLabel.numberOfLines = 0;
[dismissLabel setTextAlignment:NSTextAlignmentCenter];
dismissLabel.lineBreakMode = NSLineBreakByWordWrapping;
dismissLabel.preferredMaxLayoutWidth = 200;
UIButton* dismissButton = [UIButton buttonWithType:UIButtonTypeCustom];
dismissButton.translatesAutoresizingMaskIntoConstraints = NO;
dismissButton.contentEdgeInsets = UIEdgeInsetsMake(10, 20, 10, 20);
[contentView addSubview:dismissLabel];
[contentView addSubview:dismissButton];
UIButton* cancelButton = [UIButton buttonWithType:UIButtonTypeCustom];
cancelButton.translatesAutoresizingMaskIntoConstraints = NO;
cancelButton.contentEdgeInsets = UIEdgeInsetsMake(10, 20, 10, 20);
[contentView addSubview:cancelButton];
NSDictionary* views = NSDictionaryOfVariableBindings(contentView, dismissButton, cancelButton, dismissLabel);
[contentView addConstraints:
[NSLayoutConstraint constraintsWithVisualFormat:#"V:|-(16)-[dismissLabel]-(16)-[dismissButton]-(16)-[cancelButton]-(16)-|"
options:NSLayoutFormatAlignAllCenterX
metrics:nil
views:views]];
[contentView addConstraints:
[NSLayoutConstraint constraintsWithVisualFormat:#"H:|-(18)-[dismissLabel]-(18)-|"
options:0
metrics:nil
views:views]];
// Show in popup
KLCPopupLayout layout = KLCPopupLayoutMake(KLCPopupHorizontalLayoutCenter,
KLCPopupVerticalLayoutCenter);
KLCPopup* popup = [KLCPopup popupWithContentView:contentView
showType:KLCPopupShowTypeFadeIn
dismissType:KLCPopupDismissTypeGrowOut
maskType:KLCPopupMaskTypeDimmed
dismissOnBackgroundTouch:NO
dismissOnContentTouch:NO];
[popup showWithLayout:layout];
I think the problem on my code is the constraint.I've tried many possibilities but I cannot find the right way to do this.
Any advice will be helpful!
Thanks
You've added all three views to the vertical constraint and that's why they are all one after another. Do something like this:
V:|-16-[dismissLabel]
V:|-80-[dismissButton]
V:|-80-[cancelButton]
H:|-18-[dismissLabel]-18-|
H:[dismissButton(50)]-100-[cancelButton(50)]
I haven't tested it but something like that could work. You might have to modify the last H value or maybe add a centering option to it. There are probably better ways where you could group some of those things but this should work too.
I would like to make numbers of uiview in the center of the red area.
How could I do that with NSAutolayout ? Even when users rotate?
landscape mode
top
....................................
- view - ... 200px margin from right
| gap
- view -
| gap
- view -
| gap
- view -
....................................
bottom
Your question isn't really clear.
You can create constraints to center a view with respect to another view in a given orientation. For example, you can set one view's "centerX" attribute to equal some other view's centerX. (You could also make it equal that other view's leading, trailing, left, or right edge. Or even other attributes that don't make much intuitive sense, like width, top, etc., if that's what you want.)
If you're trying to vertically center a group like the stack of views in your diagram, there are a couple of approaches. First, you can embed the group into another view that closely encloses it. Its top would equal the top of the first view in the stack and its bottom would equal the bottom of the last view in the stack. Then you could set up a constraint to keep that container view centered within its superview.
The other approach is to create hidden spacer views. Put one view, the top spacer, above the first view in your stack. Make its top equal the top of the superview. Make its bottom equal the top of the first view in your stack. Similarly, set up a spacer at the bottom. Its top would equal the bottom of the last view in your stack. Its bottom would equal the bottom of the superview. Then, set a constraint between the top spacer and the bottom spacer to make their heights equal. That ensures that the space between the stack and the superview is the same on the top and the bottom.
The same techniques work for the horizontal direction, too, if necessary.
Update:
Here's some code which I haven't tested at all:
UIView* redArea = /* ... */;
NSArray* stackViews = /* ... */;
UIView* container = [[UIView alloc] initWithFrame:NSZeroRect];
[redArea addSubview:container];
UIView* previousView = nil;
for (UIView* view in stackViews)
{
[container addSubview:view];
if (previousView)
{
// Make a gap between the stacked views
NSDictionary* views = NSDictionaryOfVariableBindings(view, previousView);
NSArray* constraints = [NSLayoutConstraint constraintsWithVisualFormat:#"V:[previousView]-[view]" options:0 metrics:nil views:views];
[container addConstaints:constraints];
}
else
{
// Make the top of the container the same as the top of the first stacked view
NSDictionary* views = NSDictionaryOfVariableBindings(view);
NSArray* constraints = [NSLayoutConstraint constraintsWithVisualFormat:#"V:|[view]" options:0 metrics:nil views:views];
[container addConstaints:constraints];
}
// Make sure the container is at least as wide as each stacked view
NSDictionary* views = NSDictionaryOfVariableBindings(view);
NSArray* constraints = [NSLayoutConstraint constraintsWithVisualFormat:#"H:|-(>=0)-[view]-(>=0)-|" options:0 metrics:nil views:views];
[container addConstaints:constraints];
previousView = view;
}
if (previousView)
{
// Make the bottom of the container the same as the bottom of the last stacked view
NSDictionary* views = NSDictionaryOfVariableBindings(previousView);
NSArray* constraints = [NSLayoutConstraint constraintsWithVisualFormat:#"V:[previousView]|" options:0 metrics:nil views:views];
[container addConstaints:constraints];
}
// Make the container as narrow as possible after satisfying other constraints
NSLayoutConstraint* minimalWidth = [NSLayoutConstraint constraintWithItem:container attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:0];
minimalWidth.priority = UILayoutPriorityFittingSizeLevel - 1;
[container addConstraint:minimalWidth];
// Center the container within the red area
NSLayoutConstraint* centerVertically = [NSLayoutConstraint constraintWithItem:container attribute:NSLayoutAttributeCenterY relatedBy:NSLayoutRelationEqual toItem:redArea attribute:NSLayoutAttributeCenterY multiplier:1 constant:0];
NSLayoutConstraint* centerHorizontally = [NSLayoutConstraint constraintWithItem:container attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:redArea attribute:NSLayoutAttributeCenterX multiplier:1 constant:0];
[redArea addConstraints:#[centerVertically, centerHorizontally]];
This would all be easier to set up in IB.
I'm using simbl plugins to add overlay icon in finder like this: finder overlay icon
The problem is: I can not find the right way to get the file's full path in override function: FO_drawImage in IKImageBrowserCell, I only get a title.
- (void)FO_drawImage:(id)fp8
{
NSString *title = [self previewItemTitle];
if ([[title lowercaseString] hasPrefix:#"a"])
{
NSImage *icon = [fp8 _nsImage];
NSRect frame = [self imageFrame];
NSLog(#"drawing width %.0f for name '%#' icon %#",frame.size.width,title,icon);
[icon lockFocus];
CGContextRef myContext = [[NSGraphicsContext currentContext] graphicsPort];
CGContextSetRGBFillColor (myContext, 1, 0, 0, 1);
CGContextFillEllipseInRect(myContext, CGRectMake (0, 0, 10, 10 ));
[icon unlockFocus];
[self FO_drawImage:[[[IKImageWrapper alloc] initWithNSImage:icon] autorelease]];
} else {
[self FO_drawImage:fp8];
}
}
NSURL *item_url = [self previewItemURL];
that should cover it on MacOSX 10.7
Can any body give me the solution for displaying UINavigationItem prompt text in 2 lines?
There is not a built-in way to do this. Below is a work-around that seems to work pretty well that I put together from stackOverflow post UINavigationItem with prompt and activity indicator
Here is a simulator screen shot of what it creates:
Note that since the text is a UILabel you can modify its color, font, or anything else too.
// I have this code in viewDidLoad
UIView *viewContainingPrompt;
UIBarButtonItem *promptButtonItem;
// Configuring the prompt title of the navigation bar so it is present but empty
[self.navigationItem setPrompt: #""];
// We will create a UIBarButtonItem that has a custom view (viewContainingPrompt).
// A subview of viewContainingPrompt will be a UILabel (headerLabel)
// We need to have this "intermediate" view to position the label at the right position
// (the UIBarButtonItem ignores the origin and height of its custom view)
viewContainingPrompt = [[UIView alloc] initWithFrame: CGRectMake(0, 0, 0, 85)];
viewContainingPrompt.autoresizingMask = UIViewAutoresizingFlexibleWidth;
// Choose a width that puts 10 points on either end...
CGFloat labelWidth = self.navigationController.navigationBar.bounds.size.width - 20.0;
// Note that the '-60' below is determined by the width of the back button
// If someone can figure out how to determine this width at runtime this code
// would be much more robust.
UILabel *headerLabel = [[UILabel alloc] initWithFrame: CGRectMake(-60,-8,labelWidth,36)];
headerLabel.autoresizingMask = UIViewAutoresizingFlexibleWidth;
headerLabel.text = #"A quite long prompt string that will wrap to a second line to demonstrate multiline prompt.";
headerLabel.font = [UIFont systemFontOfSize: 14];
headerLabel.numberOfLines = 0; // Zero gives as many lines as will fit, could be 2
headerLabel.backgroundColor = [UIColor clearColor];
headerLabel.textColor = [UIColor colorWithRed: .1 green: .1 blue: .2 alpha: 0.8f];
headerLabel.shadowColor = [UIColor colorWithRed: 1 green: 1 blue: 1 alpha: 0.5f];
headerLabel.shadowOffset = CGSizeMake( 0, 1 );
headerLabel.textAlignment = UITextAlignmentCenter;
[viewContainingPrompt addSubview: headerLabel];
//[headerLabel release]; // Uncomment if not using ARC
promptButtonItem = [[UIBarButtonItem alloc] initWithCustomView: viewContainingPrompt];
self.navigationItem.leftBarButtonItem = promptButtonItem;
self.navigationItem.leftItemsSupplementBackButton = YES;
//[viewContainingPrompt release]; // Uncomment if not using ARC
//[promptButtonItem release]; // Uncomment if not using ARC
I would appreciate anyone's feedback on how to figure out the width of the back button during execution so that width did not have to be hard coded.
As it is I do not think there are any private APIs or other illegal code contained.