I have a UIView with some buttons on it. What I would like to do, is add a full screen blur layer between the UIView and the buttons when the user does a long press on one of them. The visual appearance and location of the buttons shouldn't change.
What is the best way to do this? Also, if possible, I would like to avoid transfering the buttons from one view to another, as this might cause me a lot of trouble (the buttons are draggable).
You can use -[UIView insertSubview:belowSubview:] method to place blur view behind buttons.
I would suggest using Pop animation framework for animations.
As for creating blur view this looks good: https://stackoverflow.com/a/25706250/2754158
You could create a view with the blur effect, and use the method view.insertSubView(blurView, above|belowView: view)
Related
what is the best way to achieve the following.
Basically what I want to do is to create an "intractable area" where the user can touch and subsequent actions will take place. For example in the picture the user taps the green area a pop is presented with some options. Similarly there would be different colour "intractable areas or buttons" with in that pizza slice, if you may.
I was thinking of having buttons created through CALayer and try to fit them with in the bounds of the empty state image, but i don't know how to achieve this. Any other ideas are well appreciated.
I would subclass UIButton or UIControl to make your custom button. Then override pointInside:withEvent: to see if the touch event is within the correct region.
See these links for more info and ideas:
Non-Rectangular Buttons on iOS
Abusing UIView (see section on pointInside:withEvent:)
How to create a transparent window with non-rectangular buttons?
iPhone button with non-rectangle shape?
OBShapedButton
So here's the situation:
I have let's say 20 views who are all subviews of the same view. Now I want to remove and add new views in an animated matter.
I previously did this by using regular UIView animations and fading them out or in respectively. The problem is though that the animation isn't flawless when the new subview who is to be inserted overlaps with the subviews who are fading out. So I tried using the +[UIView transitionFromView:toView:...] animation block to make the animation cross dissolve. This works well, animation looks good.
This basically solves my issue. The only problem is that it might be that I want to replace 2 subviews with one bigger subview. This doesn't really work out as I can't just pas nil to the transition method.
So my question basically is how I can simultaneously cross dissolve multiple subviews no matter how many views are animated?
Thanks for your help!
Have you tried putting the views to remove inside a transparent bigger view? So you just call transitionFromViewToView using the container with the 2 little ones inside and the big one that is entering?
You can use + [UIView transitionWithView:duration:options:animations:completion:], passing the common superview (usually self.view of your view controller) to perform all animations at once.
Excerpt from the doc:
This method applies a transition to the specified view so that you can
make state changes to it. The block you specify in the animations
parameter contains whatever state changes you want to make. You can
use this block to add, remove, show, or hide subviews of the specified
view. If you want to incorporate other animatable changes, you must
include the UIViewAnimationOptionAllowAnimatedContent key in the
options parameter.
I'm developing a sudoku game in Objective C, in fact I kinda already finish it, I just have to adjust something of design and make a window view, somethings like that. But i'm still learning about iOS, so a I don't know what object view is the better to use in this case.
I'm using buttons to make the sudoku squares, but I wanna put in my game the possibility to make notes on the top of the squares with the possibilites that are available in that square, but the button view only have title propriety...
What view should I use instead of buttons?
Make a custom UIView subclass and initialize it with a UILabel on top and a UIButton covering all of it.
I am updating my app to iOS 7 and wanted to improve the UI. I want to create a see through background like Control Center. So basically I have a button, which I would like to have a see through and "blurred" background like control center. Thanks!
There's nothing to stop you using a UIToolbar.
Create a UIView as a base view with clear background, add a UIToolbar anchored to it's edges so it fills the view and then add your other controls to your base view above the toolbar.
It'll look for example like this:
The blurring effect is not available as a public API. There are third party implementations available, such as FXBlurView, which I can recommend.
You shouldn't really be using a toolbar. It's called toolbar for a reason.
One way to go would be to take a snapshot image of your background and blur it (you can use UIImage+ImageEffects category included in Apple samples to achieve consistent effect).
You can then just crop the image to desired frame and use it as a background of your button.
Are you looking to have a 'dynamic' blur effect (like in Control Center)? It's still doable, but it makes things more complicated.
You can also create blur effects with GUPImage Framework here is a full tutorial about it iOS blur effect tutorial. The tutorial also explains why you shouldn't use toolbar for blur effect creation
So, I have a setup where an UIPopoverController presents information at the cursor in a text view. When the cursor moves, I present it again. But this is jarring, and I'd like for the popover to move in a smooth, animated fashion. Will I really have to do that manually by using a series of presentFromRect calls, or is there a better way?
Unfortunately UIPopovers are not designed to be moved around like that.
The only way to do that without presenting it all over again is to write your own UIPopover replacement and animate its position using the standard CAAnimation or UIKit animation techniques.
If think you cannot do that without use presentFromRect. But if you really want to do this, create your own. Recreate the look of a popover controller using a UIView and track the touches. You can use an alternative like WEPopover.