I built in my storyboard this "myView" view controller scene:
I have a simple view containing an ImageView and a UILabel (that I reference in code through IBOutlets).
What I want is transform this view to a scrollview and I was wondering if I could just adjust things in the storyboard for this purpose.
I also tried to change the view to scrollview programmatically adding to the viewController's "ViewDidLoad" method the following:
CGRect fullScreenRect=[[UIScreen mainScreen] applicationFrame];
scrollView=[[UIScrollView alloc] initWithFrame:fullScreenRect];
scrollView.contentSize=CGSizeMake(320,600);
self.view=scrollView;
But I'm not able to see my imageView and my label if I do So..Why?
I also tried (in storyboard) to assign the view (inside the "custom class" panel) the UIScrollView class but that's not working.
OK I found the solution, I changed the view type (identity inspector), but the view property of a UIViewController isn't a UIScrollView. So I get round this with casting the view to a UIScrollView:
[(UIScrollView *)self.view setContentSize:CGSizeMake(320, 1000)];
Add View to controller->Identity Inspector->Class-Change to UIScrollView
Resize your view
(self.urview as! UIScrollView).contentSize = CGSizeMake(self.view.frame.width, self.view.frame.height)
Related
If we add scroll view to storyboard it will visible on VC, but it not scrolled Why? Can any one please tell me the answer......
To make it work you need to do following.
Set the delegate property of your UIScrollView.
Set its contentSize.
Make your controller to follow the delegate of UIScrollView by adding <UIScrollViewDelegate>. in your class interface declaration.
I hope you have created your UIScrollView outlet then add this code in your viewDidLoad method.
self.myScrollView.delegate = self;
[self.myScrollView setContentSize:CGSizeMake(WIDTH, HEIGHT)];
I'm kinda new to iOS development.
I want to have a custom View and some Labels inside it. And In some viewControllers of my app on a button click I want to add/show that View
at the bottom of that viewController.
As far as I'm manually adding the view in storyboard in all the viewControllers in which I want the view to display. But this is not efficient. How can I add this view in viewControllers programmatically on button click?
Make one BaseViewController class inherited with UIViewController
Now create method named as designFooter in BaseViewController
func designFooter() {
var viewFooter: UIView = UIView(frame: CGRectMake(0, self.view.bounds.size.height - 50, self.view.bounds.size.width, 50))
viewFooter.backgroundColor = UIColor.redColor()
self.view!.addSubview(viewFooter)
}
For Swift 4, 5.1:
func designFooter() {
let viewFooter: UIView = UIView(frame: CGRect(x:0, y:self.view.bounds.size.height - 50, width:self.view.bounds.size.width, height:50))
viewFooter.backgroundColor = UIColor.red
self.view.addSubview(viewFooter)
}
Now inherit this BaseViewController to you ViewController where you want to add footer, and on button click just call self.designFooter()
If this subview you want to add has some dynamic content or has much of its own logic, you might want to employ view controller containment, specifically not only add a subview, but add a controller associated with that subview, too. So, you can have a scene in your storyboard for this subview that will appear on the bottom, and associate it with its own view controller. Then, when you want to add it, you'd do something like:
let child = storyboard!.instantiateViewController(withIdentifier: "storyboardid")
addChild(child)
// set the `frame` or `constraints` such that it is in the correct place, perhaps animating it into place
view.addSubview(child.view)
child.didMove(toParent: self)
And when you want to remove it:
child.willMove(toParent: nil)
child.view.removeFromSuperview()
removeChild(child)
Personally, if this can really appear and disappear from any scene in my app I actually embed the whole app in a container view controller. Then this popping of the child in and out only has to be done once, on this master container view controller.
For example, consider this storyboard:
That is an embedded "container view" (the storyboard equivalent of view controller containment, discussed above). And I can then have a label animate in an out (by animating layoutIfNeeded after changing the height constraint of some view with a label). Then, this bottom view can animate in and out regardless of which view controller's view is currently visible:
Just create a UIView and call addSubview:
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0,0,100,100)];//change this frame for your purposes
UILabel *l = [[UILabel alloc] initWithFrame:CGRectMake(10,10,50,10)];
[l setText: #"My label"];
[view addSubview: l];
[self.view addSubview: view];
As far as adding this to multiple view controllers... I suppose if you had a lot of different view controllers with this same UIView you could create a subclass of UIViewController called CustomViewController. In that class add the above code to viewDidLoad. Then, subclass CustomViewController in all the view controllers with this particular view, and they will automatically add it for you.
Edit:
If you want to design the view in interface builder, make a custom subclass of UIView. Let's call this CustomView. Design it in a nib and add any code you want. Then, whenever you want to create that view, simply call CustomView *cv = [[CustomView alloc] initWithFrame:...] and then do [self.view addSubview:cv];
I have a view with some UI components and a button on it, upon touch of a button I want to show a half view with some textfields on it overlapping the initial view, the initial view should be visible partly , the overlapping view will cover only half screen from bottom. Is this possible ?
I don't have any code as I am unable to figure out what it needs to be done, as we show any view it covers the entire screen.
Thanks
there are several ways you can do this, here are two:
1) add a popover controller that gets displayed on your button press:
here's some apple documentation on popovers: https://developer.apple.com/Library/ios/documentation/WindowsViews/Conceptual/ViewControllerCatalog/Chapters/Popovers.html
2) add the new view as a subview to your UIViewController
PROGRAMICALLY:
in the viewDidLoad function you can do the following to initialize the halfScreenView
GLfloat topOffset = self.view.frame.size.height/2;
UIView halfScreenView = [[UIView alloc] initWithFrame: CGRectMake(0, topOffset , [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height - topOffset)
[self.view addSubview:halfScreenView];
-more logic might be needed if you support Landscape orientation, you can always re-assign the location of the view with halfScreenView.frame.origin and halfScreenView.frame.size
-initially you can have this view be hidden
halfScreenView.hidden = YES;
-when you click the button it will show the overlaying view:
halfScreenView.hidden = NO;
USING STORYBOARD:
you can also set up your overlaying view in the storyboard if you have one
-drag a UIView into your UIViewController and set it up where you want it to be located
-initialize the view to be hidden by checking the hidden box in the attribute inspector
-add the view as a property to your view
-manage when to show this view with self.halfScreenView.hidden
-this technique allows you to customize what is inside the new view within the storyboard which is nice
FOR BOTH:
-be careful with layers, you don't want your view to show up behind the one you already present. In the storyboard the last thing inserted goes on top. With in the code you can always access/change the views z position with halfScreenView.layer.zPosition (higher z values are on top)
First create a new class subclassing UIViewController called SecondView (or whatever you want), then design the UI the way you want (in its .xib file)
Then go to your main view controller's file and make an IBAction for that button.
In that method, write:
SecondView* second = [[SecondView alloc] initWithFrame:CGRectMake(0, [[UIScreen mainScreen] bounds].size.height/2, height, width);
[self.view addSubview:second.view];
This will add it to the bottom half of the screen. Put your own parameters for its height and width. When you want to dismiss the view, you can do this inside your SecondView class
[self.view removeFromSuperview];
You can deal with the textFields from within the SecondView class and have them communicate with your other view by doing the following in SecondView.h
#property IBOutlet UITextField* textField;
Hope this helps!
Yes, assuming you are using Interface Builder, go ahead and build the overlapping view and hook up all of the IBOutlets and IBActions. Say this view is called myView. Set myView.hidden = YES and myView.enabled = NO. This hides and disables myView so that it isn't even there from the user's perspective. In the appropriate button's IBAction, change the hidden and enabled properties to YES. That will make the view visible and active again.
I have a view defined in a nib file. (named FooView.xib)
The view is of a fixed size (smaller than screen size).
I would like to load it in a view controller (named FooViewController.[hm]) and I want the view to show up in the center of the screen in whatever devices (a universal app).
Since the name of the xib and viewcontroller class have such correspondence, the view in the xib is loaded automatically.
Then I write code in the -(void)viewDidLoad method to center my view, which can be referenced by self.view. I write something like this.
CGRect screenBounds = [[UIScreen mainScreen]bounds];
self.view.center = CGPointMake(screenBounds.size.width/2, screenBounds.size.height/2);
And it does not work. Neither will it work when I modify self.view.frame = ....
I checked the values of self.view.center or self.view.frame. They did change but I didn't see any changes in the simulator.
In the xib file make sure you have disabled auto-layout.
in viewController.m: (*Edit: place this in viewDidAppear not in viewDidLoad)
[self.view addSubview:myView];
myView.center = self.view.center;
I am trying to add a hovering subview to a UIPopoverController. I have a table view controller as a content view controller inside the popover. I tried to add it as a normal subview:
UIPopoverController* popoverController = [[UIPopoverController alloc] initWithContentViewController:myTableViewController];
UIView* mySubview = ...
[popoverController.contentViewController.view addSubview:mySubView];
It is displayed correctly but unfortunately scrolls up and down with the table view. I would like to have its position fixed.
I also tried to update the position of the subview by the y offset of the scrollview in the scrollViewDidScroll: method of the table view controller, but would like to avoid this solution if possible.
You have to make the content controller a UIViewController subclass rather than a UITableViewController subclass.