uicontrolevents

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

I want my UIButton to show up the highlighted state when I click over a button that is already selected. Basically in the highlighted state I apply a *.png image as my UIButton backgroundImage to give a pressed down effect. But if the button is already in the Selected State When I click over it again I just can't see the highlighted state but it goes straight to the normal state! Watch the Issue--> Video of the Issue! Help please //0 init UIButton UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(x, y, aSide, aSide)]; //1 Give it a backgroundColor [button setBackgroundColor:aColor]

So it seems that the tappable area of an UIButton with the type of UIButtonTypeInfoLight is much larger than its frame. Because of this, I can not put a button right next to it, trying to tap it will tap the info button instead. _infoButton.frame = CGRectMake(0, 0, 40, height); _searchButton.frame = CGRectMake(CGRectGetMaxX(_infoButton.frame), 0, 40, height); Does anyone have any insite on how to get the tappable area of the button? Edit:having the button next the info button it is not my core question (just an illustration of why it might be important). My question is about finding out the

I've created a custom picker view type of control by subclassing UIView. I would like to be able to send a "UIControlEventValueChanged" control event from within this control, so that I can register for it in whichever view controller is using the control. How can I can I get my custom control to trigger this event when I deem it should be triggered? Assuming your custom control extends UIControl , then you simply do: [self sendActionsForControlEvents:UIControlEventValueChanged]; This will call all registered targets (via addTarget:action:forControlEvents: that this event has happened. 来源：

I've run into a weird effect that sure looks like a bug in iOS7 -- but often in the past, when I have thought I found a bug in Apple's APIs, it has turned out to be my own misunderstanding. I have a UIDatePicker with datePickerMode = UIDatePickerModeCountDownTimer and minuteInterval = 5. I initialize the duration to 1 hour, and present it to the user, where it appears as a two-column picker with hours and minutes. (So far so good.) The user is thinking "20 minutes," and so scrolls the Hour column to 0. At this point the picker reads 0 hours and 0 minutes, and iOS7 is not cool with that, so it

I am using addTarget:action:forControlEvents like this: [newsButton addTarget:self action:@selector(switchToNewsDetails) forControlEvents:UIControlEventTouchUpInside]; and I would like to pass parameters to my selector "switchToNewsDetails". The only thing I succeed in doing is to pass the (id)sender by writing: action:@selector(switchToNewsDetails:) But I am trying to pass variables like integer values. Writing it this way doesn't work : int i = 0; [newsButton addTarget:self action:@selector(switchToNewsDetails:i) forControlEvents:UIControlEventTouchUpInside]; Writing it this way does not