uicontrolevents

How to get the touch coordinates from a valueChanged event in Swift

由 六月ゝ 毕业季﹏ 提交于 2020-02-01 19:01:07
问题 Background I've previously learned how to use a Gesture Recognizer or continueTrackingWithTouch to get continuous updates of the current touch location and to then use those to do something like this: Now, however, I would like to learn how to do the same thing using targets. I can already get the touch down and touch up events by using TouchDown and TouchUpInside , but I don't know how to get the continuous updates. I assumed that it would be using the ValueChanged event, but so far that isn

UIControlEventValueChanged not working when i tapped an already selected segment section

由 大憨熊 提交于 2019-12-25 04:58:11
问题 My aim is to trigger UIControlEventValueChanged delegate again when i tapped an already selected segment . So i have referred the below links uisegmentedcontrol-register-taps-on-selected-segment maintaining-selection-in-uisegmentedcontrol As per the links i have created a uisegmentedcontrol subclass , implemented the - (void) setSelectedSegmentIndex:(NSInteger)toValue { method and wrote the codes (from the above links). Its worked fine with Ipad1. However the setSelectedSegmentIndex in the

What is UIControlEventTouchCancel?

由 ☆樱花仙子☆ 提交于 2019-12-24 17:19:50
问题 When the user taps and holds down a UIButton in my app, after a while a UIControlEventTouchCancel event is fired. The Apple documentation for UIControl doesn't have any detailed explanation about this event. Why is it triggered? What is it used for? [button addTarget:key action:@selector(keyUp:) forControlEvents:UIControlEventTouchUpInside]; [button addTarget:key action:@selector(keyUp:) forControlEvents:UIControlEventTouchUpOutside]; [button addTarget:key action:@selector(keyCancel:)

UIResponder and multiple UIControlEvents

由 北战南征 提交于 2019-12-24 00:25:45
问题 Is there a way to call a selector for multiple UIControlEvents? this doesn't work, but itl'll give u an idea of what i'm trying to do. [self.slider addTarget:self action:@selector(sliderDidStopDragging:) forControlEvents:UIControlEventTouchUpInside, UIControlEventTouchUpOutside]; thanks!! 回答1: try this way instead: // same selector for different events [self.button addTarget:self action:@selector(selector0:) forControlEvents:UIControlEventTouchUpInside]; [self.button addTarget:self action:

UIButton Highlighted State not showing when clicking over a Selected UIButton

由 放肆的年华 提交于 2019-12-12 08:34:40
问题 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]

Control event not firing from class linked to resource dictionary wpf

由 百般思念 提交于 2019-12-11 08:20:42
问题 Hi I am attempting to attach a function to text box used for entering some input information which is loaded to an interface from resource dictionary. Here is the XML, <ContentControl> <Grid> <Image s:DesignerItem.Code ="1773" IsHitTestVisible="False" Stretch="Fill" Source="../Images/addition.png" ToolTip="Addition" /> <TextBox Height="57" Width="56" Margin="13,13,130,13" BorderThickness="0" FontSize="45" HorizontalAlignment="Center" VerticalAlignment="Center" HorizontalContentAlignment=

How do I get a UIButton press to work in a UICollectionViewCell in Swift?

由 亡梦爱人 提交于 2019-12-10 11:07:41
问题 So this is a tvOS project in Swift. I have a custom UICollectionViewCell with a button as one of its subviews. I add a target to the button to allow it to interpret clicks. Here's a simplified version of the relevant code class CustomCell: UICollectionViewCell { var button:UIButton! override init(frame: CGRect) { super.init(frame: frame) button = UIButton(...) // Button is initialized with a frame button.userInteractionEnabled = true button.enabled = true button.addTarget(self, action:

How to distinguish between fired events for a UIButton callback action

由 我与影子孤独终老i 提交于 2019-12-07 10:15:44
问题 When defining a callback for a UIButton I listed several events for the same action In the target I would like to be able to distinguish what event triggered the callback [button addTarget:self action:@selector(callback:) forControlEvents:UIControlEventTouchDown | UIControlEventTouchCancel]; -(void)callback:(UIButton *)button { // need to be able to distinguish between the events if (event == canceled) { } if (event == touchDown) { } ... etc } 回答1: You can change your action to take the event

How do I get a UIButton press to work in a UICollectionViewCell in Swift?

由 别说谁变了你拦得住时间么 提交于 2019-12-06 12:58:46
So this is a tvOS project in Swift. I have a custom UICollectionViewCell with a button as one of its subviews. I add a target to the button to allow it to interpret clicks. Here's a simplified version of the relevant code class CustomCell: UICollectionViewCell { var button:UIButton! override init(frame: CGRect) { super.init(frame: frame) button = UIButton(...) // Button is initialized with a frame button.userInteractionEnabled = true button.enabled = true button.addTarget(self, action: "pressed:", forControlEvents: .PrimaryActionTriggered) contentView.addSubview(button) } func pressed(sender:

UIButton UIControlEventTouchUpInside does not fire, but UIControlEventTouchDown does fire

由 房东的猫 提交于 2019-12-06 00:34:27
问题 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];
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