What I want to do, is whenever the user clicks anywhere on the screen, a shadow or an instance of a shadow is created wherever they click for as long as they click. Like having an app that has a white background but whenever you press the screen a black dot appears under your finger and follows it but when you take your finger off it disappears.
To handle touch events, here's a great guide on UIGestureRecognizers on Raywenderlich.
As for the black dot that you described, you could try drawing it with CoreGraphics.
Related
I have a screen in Corona to display a puzzle, and once user guess the correct answer, I'm going to display a simple pop up on the screen to do the congratulation a long with close button to dismiss the popup, now I need for a simple work around to disable any control or behaviour on the original screen while displaying the popup, how can I do that?
I think you need to do this by stop or pause transitions, timers and animations etc. before you go to scene with pop up.
You can add transparent rectangle from transparent image file (not just rectangle, as it will not be touchable).
Size of this rectangle must be the size of all screen.
Position of rectangle - under your popup (or better make it as part of your popup).
Add listeners to this rectangle on touch and tap that will just return false - so it will prevent any clicks under it.
That will save you from pausing / disabling buttons, that you don't want to disable/pause.
Anyone know how the UBER app does the following animation/transition
1) In the main UBER app there is a menu icon with 3 bars in upper left hand corner, when you pan or drag the message view from the bottom (slowly), the menu icon slowly morphs or turns into an up arrow icon and the background slowly turns in to BLACK. Is this done programmatically or is this done for you through the animation library?
This is a custom animation that they do when the user grabs the cards at the bottom of the screen.
They probably draw the menu icon themselves and then using the animation library they morph the lines and rotate everything to look like an up arrow.
Raywenderlich has some good tutorials on animations and their animation book is really good.
https://www.raywenderlich.com/173544/ios-animation-tutorial-getting-started-3
There is a simple button in our application which when is pressed works just as expected, but with a light quick touch it just greys out and does nothing.
Is there a way to capture those light touches too?
EDIT:
I see now when exactly it doesn't work and it is when I tap, drag and release. (even if I tap, drag and don't leave the button area)
Try setting EventSystem.pixelDragThreshold to a higher value. This threshold makes the difference between a click and a drag, and it's default value is quite low for high-res touch systems.
I am building a game in which there are two ui buttons on the game. I am using unity 4.6 to build this.I have one button that will turn my player blue and another that will turn the player yellow. I need it so when both are pressed my player will turn green. I haven't found much on multitouch with these UI buttons. I would love the help!
In the usual button paradigm, the button completes the action when the user presses the button and then ends the press while the pointer (mouse or finger) still on the button. This is called "click". You are saying that you need this event to happen while the buttons are still pressed — so, you want them to react to press-down event, not the click event. Therefore, they are no longer classical buttons, and you probably shouldn't use Unity's UI Button for this functionality. If you'd use buttons for that, when the user first pressed on both buttons, you'd get green color, but when he then stopped touching them, you'd finally get yellow or blue player.
Instead, use the EventTrigger component on each individual "pseudo-button" to register press-down events, and a separate custom component that would implement your logic. Essentially, the only way to realize your requirements without them being contradictory, is to assign the yellow color when the player is pressing down both "pseudo-buttons" and assign other colors when the player lifts his fingers up from either of them — but given that this particular touch wasn't used to trigger the yellow color.
hi i am new to iphone. what i need is i want to display an image for example balloon. when ever i click the button the balloon automatically start moveing up vertically from bottom of the simulator to top of the simulator.While it reaches top of the simulator automatically it moves towards down.How can i done this.please post any relevant code or link.Thank you in Advance.
Have a look at this example from Apple you just need to recognize the first touch on the balloon and then make it move wherever you want (by using an animation or manually redrawing the UIImageView representing the balloon each time using a NSTimer)