I am developing an iPhone application in which I want to customize the action sheet with my own background image for action sheet and buttons.
I can write my own view which behaves like UIActionSheet. But, UIActionSheet by itself has some standard behavior like blocking orientation events. We might not be aware of such things. So, for safety purpose, it is better to have UIActionSheet itself; by replacing all its views with my custom view.
For this I have done the following things:
1. Create UIActionSheet. Call showOnView: on that action sheet.
2. Set the delegate as myController
3. In the delegate method willPresentActionSheet: remove all the subviews and add my custom view as action-sheet's sub-view
The problem is that I cannot get the animation affect of Action Sheet with my custom view, Because,UIActionSheet is animated before calling willPresentActionSheet (in showInView). If I override showInView and add my own animation I might miss the behavior like:
1. Blocking orientation events
2. Some of the views (the argument of showInView:) might no support orientation. I should be able to apply same orientation to my action-sheet in showInView.
Could someone help me out in achieving customization?
Thanks and Regards, Deepa
Related
so I have an application with several images, buttons, etc.. Now, I would like to control programmatically which object is in the foreground and which is further in the back. I know that in the storyboard this is possible, but since I declare a button in the AppDelegate (I don't have in the storyboard) I can't use this function.
Now, is there a way to do this?
You have to use the property .zPosition to accomplish that.
Look at the "Managing View Hierachy" section on UIView to accomplish this.
https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIView_Class/index.html#//apple_ref/doc/uid/TP40006816-CH3-SW46
You can bring views to the front or send them to the back or adjust their index among others.
- (void)bringSubviewToFront:(UIView *)view
I want to change an UIToolBar at runtime. In it's initial state, is has only one button, when that button is pressed i want it to change it's appearance to show 4 buttons. One of these buttons should cause the first UIToolBar to reappear.
Im seeing two approaches:
1) Have two UIToolBar nibs, and load them as needed.
2) Having all buttons on the first UIToolbar, and hide/show them as needed.
What would be the correct approach?
Personally, I would want to see all 4 button at initial launch with only relevant button in enabled state and rest in disabled state. Once I tap on the already enabled button I should see other buttons getting enabled. This is less surprising UI for end user. However, you can also go with #2 mentioned above in which case you might want to add some animation effect for better user experience.
The second approach would be better, because if you want to add more buttons tomorrow, you need to maintain 2 nib files instead of one.
But, think again is creating toolbar in xib file good solution?
I would create custom toolbar extending UIToolbar class and make 2 methods in it:
-(NSArray*) toolbarButtonsInitial;
-(NSArray*) toolbarButtonsExtended;
-toolbarButtonsInitial method returns UIBarButtonItems for initial state
-toolbarButtonsExtended method returns UIBarButtonItems for second state.
IMHO, this way has several advantages:
Your xib file doesn't have hidden buttons, or some button above other
one
If you need to add or remove some buttons you can do that easily for
each state
You can easily reuse this toolbar on other screens and create new
states if necessary
I wonder which component is being used to create a selector option like the one used in iBooks where we can adjust the Font Size and also the Theme, but without moving to a new view controller.
In my application I would like to implement it giving 3 small options to the user to choose, but without moving the view controller being presented. Its a small square area with an arrow at the bottom or top side giving the impression where it's coming from. (Let me know if I am not clear with the explanation).
Does anybody know how to use it??
Thank you all in advance
ibooks is using UIView. In that UIView you can add any controls you like. You need to use delegate methods so that I can perform communication between two objects(send message to another object). You will be able to make you custom UIView as controls.
I have a UIActionSheet and when it displays it darkens the main view behind it, I am under the impression this is default behavior for an action sheet. My question is, how do I override this behavior to leave the main screen the same tint as it normally is? I'm assuming I do something like:
mainView.alpha = 1f;
Or something...I can't remember if alpha needs to be maxed or 0 to leave a screen with the same coloration/transparency. Anyways, if that is correct where should it happen? My action sheet is being called in place of a keyboard for a UITextField.
Thanks in advance.
You can't change this behavior. UIActionSheet is actually presenting a whole new view overtop of your view. It's this additional view that adds the tint. There is no API to change this.
Your best solution is to implement your own custom equivalent to UIActionSheet so it does exactly what you want.
I am having trouble with assigning a UIControl subclass I made as a text field's inputView.
It shows - as expected - when the text field becomes firstResponder and hides when it resigns it firstResponder status.
However, the thing I am having trouble with is handling different orientations:
I set an autoresizingMask to the control's subviews so that there is a smooth transition when changing its width.
The thing is, they appear to be ignored as soon as I set it as the inputView.
When enabling the simulator slow-motion animations via triple-hitting shift, you can see very clearly that the view fades between the two states.
This is not what I want. Firstly it looks odd, and secondly this does not fit my needs.
Since the inputView contains a UIScrollView-like element, it would stop its deceleration animation during the fade.
Now my question is: Is there a way to prevent the fade from happening?
I would really like to use the inputView property since it saves me from writing lots of lines of code.
Also, is it possible to specify different heights for different orientations?
Here are two demo projects showing how it is and how I want it to be.
Thanks in advance.
You can create a method to your DatePicker class, that changes the geometry and layout of the view for different orientations and the implement the method
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
in your view controller and call the method on your view to align it.
Until today I have found no way to prevent them from fading.