Is it possible to press a button in iPhone SDK programmatically without the user touching it?
You can just do:
[button sendActionsForControlEvents:UIControlEventTouchUpInside];
Do you want the user to see the button as pressed? Set the highlighted property to true and it will look like being pressed.
Now, if you just want to simulate the consequence of a button being pressed, just call the selector you assigned to the "Touch Up Inside" or "Touch Down Inside" events.
You could synthesize a touch on the button's coordinates, and set the appropriate event here's how
Overlay a second larger button that is transparent and assign the same selector it that you have on the other button.
Related
I have a UIButton which has a function for TouchUpInside. The problem I have is that when the user drags away from the button I would like to cancel the button from functioning, until of course the user presses the button again.
The function that's called when they drag away which is what I'm most likely going to use is TouchDragExit. Can anyone suggest anything in this case?
To elaborate more on what I mean, if the user is holding the button and decides to drag away then drag back to the button I don't want my touchUpInside function to function.
Register an action for the button's UIControl.Event.touchDragExit. When the button fires .touchDragExit, call the button's cancelTracking(with:), passing the UIEvent that it passed to your .touchDragExit action.
I want to drag and drop UIbutton in my app like iPhone main screen icons.
I can do this but while clicking the button it should perform an action. But this action is also called while dragging the button. I am using UIControlEventTouchDown for touch action and UIControlEventTouchDragInside for dragging the button.
Maybe you can use UIControlEventTouchUpInside for this action instead touch down.
In UIControlEventTouchDragInside you may change the shared variable named like "dragPerformed" to YES, and then, if it is NO perform click button action in UIControlEventTouchUpInside, if YES - do nothing (that is drag) and turn it to NO
When you touch a UIButton it hides for a fraction of second and then it executes its action. This fast "blink" is the feedback the user needs to know that the button has been clicked.
In the project I am doing, I need to select the button programmatically, as if the user had clicked it. In other words, the same behavior has the button had been clicked by the user... a fast blink and execution of its action.
Is this possible to do?
thanks for any help.
The change in the appearance of the button is effected by setting the button's highlighted property. The property is automatically set to YES when the user touches down on the button, and back to NO when she releases.
The highlighted property is writable, so you can set it YES yourself to simulate a touch down. You'll probably want to use +[NSTimer scheduledTimerWithTimeInterval:invocation:repeats:] to set it back to NO after a short interval.
It is pretty simple, and probably there is a better solution.
First, use images to your button, and when you have to fire the button, you just change the button's image in the normal state to the pressed image, and after that, replace it back to the original. You can simply do it with a timer.
how can i just change the color,of a button when i set the focus on the button in iphone.
I mean to say , for example we have 5 buttons, and i am just setting the focus on each of the button. i want those buttons to be higlighted with different color.
but when press or touch up inside the utton, the navigation is made to the respective forms, that is set for that button.
you can write method, for example, let it be
- (void) changeButtonState:(UIButton*) buttonToChange;
then you can call it in your onBtnClk method for button you need. in that method you can change image for your button's UIControlStateNormal mode. and if I understand right, you can use toolbar or tabbar instead of buttons.
Guess you have already asked this issue differently here..
But have you checked the answer?? You can use any of those methods at your will!
when i am pressing my UIButton ,(i did not release my mouse button),i want to change
title? i tried touchupinside through XIB.but it was called after i released my mouse button.
i tried both land also all states....?
[sButton setTitle:#"hai" forState:UIControlStateNormal];
[sButton setTitle:#"hai" forState:UIControlStateHighlighted];
The Control Events documentation will list all of the events you can subscribe to for controls (in this case, your UIButton). The one you want is UIControlEventTouchDown. But the problem with your requirement is that pushing the button covers the screen with the user's finger and I wonder whether changing the title will really be beneficial.