uislider

问题 i want to animate an UISlider for e.g. 0.25 to 0.75 and back. This should show the user what is to do. i tried this: [self incrementCounter:[NSNumber numberWithInt:0]]; -(void) incrementCounter:(NSNumber *)i { [Slider setValue:[i floatValue]/1000]; [self performSelector:@selector(incrementCounter:) withObject:[NSNumber numberWithInt:i.intValue+1] afterDelay:0.001]; } but thats not so smooth... can i use transitions for this? [Slider setValue:1 animated:YES]; is to fast... [UIView

问题 I have a slider that I'm using to set a float value somewhere. I connect Value Changed to a method in my viewController. That part works fine. I need to know when the user starts touching the control but not necessarily every single instant that the slider changes (I receive the Value Changed events for that). So I connected a Touch Up Inside event to another method in the viewController. The problem it, that method gets called twice when the user touches the UISlider control. WTF? It doesn't

问题 I am customizing an UISlider for my app. I want the slider to be in vertical orientation, but the default UISlider is in horizontal orientation. I couldn't find how to change a UISlider 's orientation. How can I make a vertical slider in XCode? 回答1: By default, a UISlider is horizontal (--). If you wish to make it vertical (|) then you must do this programmatically, probably with a CGAffineTransform . For example, you can add this snippet to viewDidLoad or wherever you deem appropriate:

问题 I'm trying to emulate Apple's "Slide to Unlock" feature in my application. I get to this point (image below), but as you can see the UISlider's "track" is visible and is covering up my text. Is there a way to change an attribute programmatically that will make the "track" invisible? Please let me know if you need any of my code. Thanks in advance! EDIT: If I change the slider's alpha to 0, it gets rid of my sliding button, so doing that won't work unless I'm doing it wrong. :) 回答1: here's an

问题 I'm trying to emulate Apple's "Slide to Unlock" feature in my application. I get to this point (image below), but as you can see the UISlider's "track" is visible and is covering up my text. Is there a way to change an attribute programmatically that will make the "track" invisible? Please let me know if you need any of my code. Thanks in advance! EDIT: If I change the slider's alpha to 0, it gets rid of my sliding button, so doing that won't work unless I'm doing it wrong. :) 回答1: here's an

问题 I've seen some nice examples of jQuery sliders that select date ranges: http://ghusse.github.com/jQRangeSlider/stable/demo/ And time ranges: http://marcneuwirth.com/blog/2011/05/22/revisiting-the-jquery-ui-time-slider/ But I'm looking for something that will be able to select date ranges down to the month, day, minute. It would be great to be able to have it as both a date range selector and a plain slider. Has anyone seen an implementation like that? Would the normal jQuery UI slider using

问题 Please Suggest me i want to go in 15 minute intervals. ex: 4:00, 4:15, 4:30, 4:45 and so next. @IBAction func sliderMoved(sender: UISlider) { let slot = Double(sender.value) let slotDate = self.timeFromSlot(slot) print(timeFormatter.stringFromDate(slotDate!)) } private func timeFromSlot(slot:Double) -> NSDate? { let cal = NSCalendar.currentCalendar() let unit:NSCalendarUnit = [.Year, .Month, .Day, .Hour, .Minute, .Second] let comps = cal.components(unit, fromDate: NSDate()) comps.hour = Int(

问题 First off I want to say I saw a couple of posts on this site about how to do this, although none seemed to work for me so please don't close this down until I get it working. What I want to do is make the background of the view change depending on the value of the sliders are, so that the user can choose the background colour they want. self->colorView.backgroundColor = [UIColor myColor]; myColor = I figure I'll need a bit of code like that, although I don't know how to define what my colour

问题 First off I want to say I saw a couple of posts on this site about how to do this, although none seemed to work for me so please don't close this down until I get it working. What I want to do is make the background of the view change depending on the value of the sliders are, so that the user can choose the background colour they want. self->colorView.backgroundColor = [UIColor myColor]; myColor = I figure I'll need a bit of code like that, although I don't know how to define what my colour

问题 The minimum value of the slider is -1 the maximum value is +1. @IBAction func changeContrast(_ sender: UISlider) { DispatchQueue.main.async { let beginImage = CIImage(image: self.myImageView.image!) self.filter = CIFilter(name: "CIColorControls") self.filter?.setValue(beginImage, forKey: kCIInputImageKey) self.filter.setValue(sender.value, forKey: kCIInputBrightnessKey) print("Current value of the slider - \(sender.value)") self.filteredImage = self.filter?.outputImage self.myImageView.image