I've a UIButton on cell of UITableView in my VC like this
arrowBtnUp = [UIButton buttonWithType:UIButtonTypeCustom];
arrowBtnUp.frame = CGRectMake(50,(65-19)/2,31, 31);
[arrowBtnUp setBackgroundImage:[UIImage imageNamed:#"arrow_up.png"] forState:UIControlStateNormal];
[arrowBtnUp addTarget:self action:#selector(slideAction) forControlEvents:UIControlEventTouchUpInside];
[cell.contentView addSubview:arrowBtnUp];
and this my slideAction
-(void) slideAction
{
[arrowBtnUp setBackgroundImage:[UIImage imageNamed:#"arrow_down.png"] forState:UIControlStateNormal];
// also tried with UIControlStateSelected/Highlighted
}
But it didn't work.I found this link but didn't help.
Any suggestion or sample would be appreciated.
Your code should work.Anyways change your code like this and try
-(void) slideAction:(id)sender
{
[sender setBackgroundImage:[UIImage imageNamed:#"arrow_down.png"] forState:UIControlStateNormal];
}
and
[arrowBtnUp addTarget:self action:#selector(slideAction:) forControlEvents:UIControlEventTouchUpInside];
and ensure that you have arrow_down.png in your app bundle
The issue is you are reusing the arrowBtnUp instance of UIButton.
Hence in the slideAction method you won't get the pressed buttons reference.
For getting the reference in the slideAction method you need to pass it as an argument.
So change the code like:
[arrowBtnUp addTarget:self action:#selector(slideAction:) forControlEvents:UIControlEventTouchUpInside];
-(void) slideAction:(UIButton *)myButton
{
[myButton setBackgroundImage:[UIImage imageNamed:#"arrow_down.png"] forState:UIControlStateNormal];
}
If you're trying to change the button image after a touch, you should use the UIButton's control states. You can assign a background image for each "state" and let UIButton determine which to show.
Background image is different than the icon on the button. Try this instead:
[_buttonConfirm setImage:[UIImage imageNamed:#"s.png"] forState:UIControlStateNormal];
If you're trying to change the button image after a touch, you should use the UIButton's control states. You can assign a background image for each "state" and let UIButton determine which to show.
[myButton setBackgroundImage:[UIImage imageNamed:#"arrow_up.png"] forState:UIControlStateNormal];
[myButton setBackgroundImage:[UIImage imageNamed:#"arrow_down.png"] forState:UIControlStateSelected];
There is no need to manually switch the background images in your slideAction: target method.
Related
I would like a way to either reduce the darkness change (or turn off as a last resort) that you get when you hold down a UIButton on iOS 7 and 6. It looks horrible due to the image on the button when selected
Thanks
Dylan
You can set different images and/or background images based on the UIControlState.
For example in case of images:
[comment_notification setBackgroundImage:[UIImage imageNamed:#"1"] forState:UIControlStateNormal];//Normal state
[comment_notification setBackgroundImage:[UIImage imageNamed:#"2"] forState:UIControlEventTouchUpInside];//pressed and released state
[comment_notification setBackgroundImage:[UIImage imageNamed:#"3"] forState:UIControlEventTouchDown];//pressed state
or in case of background colour, add targets:
[loginButton addTarget:self action:#selector(performLogin) forControlEvents:UIControlEventTouchUpInside];
[loginButton addTarget:self action:#selector(loginButtonPressed) forControlEvents:UIControlEventTouchDown];
[loginButton addTarget:self action:#selector(releasedButton:) forControlEvents:UIControlEventTouchUpOutside];
and in the target method, like buttonpressed:
- (void) buttonpressed:(UIButton*)button{
[button setBackgroundColor:[UIColor blueColor]];
}
and so on for respective states
I want to add image as button, and when it is clicked it should open a new view controller...
Does anyone know how to do?
I created a button and added image, but its not nice, because when I click on the image it animates a square arround the image, which I do not want. This what I did.
- (void)setTutorialButtonImage
{
[self.tutorialButton setImage:[UIImage imageNamed:#"app_logo.png"] forState:UIControlStateNormal];
}
Does any one know how to do... just an image and when I click on it start a new controller
You can disable the highlighting effect by using
self.tutorialButton.adjustsImageWhenHighlighted = NO;
Also try setting the same image for selected and highlighted states too
[button setBackgroundImage:[UIImage imageNamed:#"app_logo.png"] forState: UIControlStateHighlighted];
[button setBackgroundImage:[UIImage imageNamed:#"app_logo.png"] forState: UIControlStateSelected];
For better look and feel you can apply insets on image using
- (UIImage *)resizableImageWithCapInsets:(UIEdgeInsets)capInsets
UIButton *sampleButton = [UIButton buttonWithType:UIButtonTypeCustom];
[sampleButton setFrame:CGRectMake(x, y, width, height)];
[sampleButton setBackgroundImage:[UIImage imageNamed:#"image.png"] forState:UIControlStateNormal];
[sampleButton addTarget:self action:#selector(buttonPressed) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:sampleButton];
I can't understand why the selector is not called.
//EDITED
[self.scrollView setContentSize:CGSizeMake(320, 600)];
UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[btn addTarget:self
action:#selector(validateTextFields:)
forControlEvents:UIControlEventTouchUpInside];
[btn setTitle:#"Продължи" forState:UIControlStateNormal];
btn.frame = CGRectMake(55, 580, 210, 50);
[self.scrollView addSubview:btn];
-(IBAction)validateTextFields:sender
{
NSLog(#"Called");
}
When I touch the button "Called" is not logged in console. If I change UIControlEventTouchUpInside to UIControlEventTouchDown validateTextFields method is executed.
You are adding a button on UIScrollView, this might be creating problem. Please check this question: iPhone: adding button to scrollview makes button inaccessible to interaction. It may be helpful.
The type for action should be
- (IBAction)validateTextFileds:(id)sender
{
// do your stuff
}
and your #selector parameter in addTarget should look like this: #selector(validateTextFields:)
try this:
[addContact addTarget:self action:#selector(buttonPressed:)forControlEvents:UIControlEventTouchUpInside];
-(IBAction)buttonPressed:(id)sender{
}
I am implementing UIButton and my UIControlEventTouchUpInside event does not fire, even though UIControlEventTouchDown does fire.
UIButton *btnClose = [UIButton buttonWithType:UIButtonTypeCustom];
NSString *filePathImage = #"img.png";
NSString *filePathImageTap = #"img-tap.png";
UIImage *buttonImage = [UIImage imageWithContentsOfFile:filePathImage];
UIImage *buttonImageTap = [UIImage imageWithContentsOfFile:filePathImageTap];
[btnClose setImage:buttonImage forState:UIControlStateNormal];
[btnClose setImage:buttonImageTap forState:UIControlStateSelected];
[btnClose setImage:buttonImageTap forState:UIControlStateHighlighted];
[btnClose addTarget:self action:#selector(close:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btnClose];
I have an assumption why it doesn't take the UIControlEventTouchUpInside:
I had two "BannerView" (Advertisement) in two different ViewControllers. In one it just worked fine in the other I saw how the UIButton was touched and the second image (darker) appeared. But the selector was not hit. Then I realized, that the Up-Event was absorbt by a UISwipeGestureRecognizer from a UIImageView below. Some Recognizer compete against each other. I searched for an overview to see witch ones these are, but found nothing.
Another solution:
If you see that the ButtonState doesn't change u have to look if you have a View over your Button.
I am trying to change Action For the UIButton in ios applicatio. I did Following Code
button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self action:#selector(aMethodShow:) forControlEvents:UIControlEventTouchDown];
[button setTitle:#"Show View" forState:UIControlStateNormal];
button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
[view addSubview:button];
In particular Section I want to change Action for this Button .So i did this
[button addTarget:self action:#selector(aMethodHide:) forControlEvents:UIControlEventTouchDown];
[button setTitle:#"Hide View" forState:UIControlStateNormal];
Unfortunately This code note Working?
I suggest before adding new target, first invoke removeTarget on UIbutton object then add new target with other action.
I think it will help you
[yourButton removeTarget:nil
action:NULL
forControlEvents:UIControlEventAllEvents];
[yourButton addTarget:self
action:#selector(yourAction:)
forControlEvents:UIControlEventTouchUpInside];
You can use same action target instead of using two target. In one target you have to differentiate like below
-(void)btnAction
{
if(target1)
{
// code for target 1
}
else
{
// code for target 2
}
}
Here target1 is BOOL value which value first set to be YES. And change its value NO whenever you want to perform target 2 code.
I hope this will helps You.
I made an app recently and i had the same situation, but i found another way to solve it so i decided to share my solution with people who may be in the same situation.
I'll try to explain what i did with the context of this question:
I added a tag to the button and i associated it with one of the functions that button needs to call (aMethodShow: for example).
button always call the same function (callSpecificFunc: for example). What callSpecificFunc: does is call either function aMethodShow: or aMethodHide according with the current button tag.
In the particular section in which the button needs to call a different function, i only change the tag of button.
Something like this:
NSInteger tagOne = 1000; //tag associated with 'aMethodShow' func
NSInteger tagTwo = 1001; //tag associated with 'aMethodHide' func
button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self action:#selector(callSpecificFunc:) forControlEvents:UIControlEventTouchDown];
[button setTitle:#"Show View" forState:UIControlStateNormal];
button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
[view addSubview:button];
...
// in some part of code, if we want to call 'aMethodShow' function,
// we set the button's tag like this
button.tag = tagOne
...
//Now, if we want to call 'aMethodHide', just change the button's tag
button.tag = tagTwo
...
-(void) callSpecificFunc:(UIButton*)sender
{
NSInteger tagOne = 1000;
NSInteger tagTwo = 1001;
if([sender tag] == tagOne){
//do whatever 'aMethodShow' does
}else {
//do whatever 'aMethodHide' does
}
}
Of course it could be applied for more than 2 functions :)