Make UIImageView receive actions

[kieran12]

Hey everyone. I have a UIImageView that I want to receieve an action. I want it to act like a button. It will not have an image set so it will be invisible, then when tapped i want it to change to an image.

I know that IBActions do not work on a UIImageView. How could I achieve this?


P.S I don't want to set the image property of a button it must be a UIImageView.

[smasher]

Originally Posted by kieran12

Hey everyone. I have a UIImageView that I want to receieve an action. I want it to act like a button. It will not have an image set so it will be invisible, then when tapped i want it to change to an image.

I know that IBActions do not work on a UIImageView. How could I achieve this?


P.S I don't want to set the image property of a button it must be a UIImageView.

UIImageView inherits from UIControl - so look there to see how it can respond.

As far as I can see, you should not have to subclass UIImageView - just sent add another object as the target for any UIControlEventTouchUpInside events, using "addTarget:action:forControlEvents:"

iPhone Dev Center

Something like this: (Danger, I have not compiled this. Watch for typos.)

[myImageView addTarget:myController action:@selector(myAction:) forControlEvents:UIControlEventTouchUpInside];

myController should be an object that has a method "myAction: (id)sender" .

[kieran12]

Thanks, I'll give it a try!

[lexy0202]

Hi Guys,

There may be a technical reason why this does not work... but you can use a normal button and set it's type (top of the inspector) to custom, then just set your image to the BG.

Alex

[RSO Software]

Originally Posted by kieran12

Hey everyone. I have a UIImageView that I want to receieve an action. I want it to act like a button. It will not have an image set so it will be invisible, then when tapped i want it to change to an image.

I know that IBActions do not work on a UIImageView. How could I achieve this?


P.S I don't want to set the image property of a button it must be a UIImageView.

Replace it with a button in the drawRect statement.

- (void)drawRect:(CGRect)rect {

	myButton = [UIButton buttonWithType:UIButtonTypeCustom];
	[myButton setImage:[UIImage imageNamed:@"Image Name.png"] forState:UIControlStateNormal];
	middleControllerButton.frame = CGRectMake(x, y, width, height);
	[myButton addTarget:self action:@selector(myAction) forControlEvents:UIControlEventTouchUpInside];
	[self addSubview:myButton];

}

[kieran12]

I started this thread a long time ago now. Forgot all about it. In the end I just used a UIImageView and the touchesBegan/touchedEnded methods.

[deansx]

Originally Posted by kieran12

Hey everyone. I have a UIImageView that I want to receieve an action. I want it to act like a button. It will not have an image set so it will be invisible, then when tapped i want it to change to an image.

I know that IBActions do not work on a UIImageView. How could I achieve this?


P.S I don't want to set the image property of a button it must be a UIImageView.

The default value for the userInteractionEnabled property of a UIImageView is NO. To make a UIImageView accept actions, you need to set the value of the property to YES.

[myUIImageView setUserInteractionEnabled:YES];

[yoichi]

I could use Touch events of the UIImageView programmartically, use a transparent button over the image, use a custom button with the image, etc.

However, I can't simply use the UIImageView with UserInteractionEnabled inside the Interface Builder and simply wire it to an IBAction. There is no IBAction I can wire the UIImageView to. Nor can I set the Class of it to UIControl. (Like for the background, I can change the class to UIControl and wire it to backgroundTouched action).

Since the UIImageView must have desended from UIVIew and UIView can be a UIControl, this does not make much sense, but that is how it is in the Interface Builder.

Anyone has any idea how to?