Does any JVM implement blocking with spin-waiting?
By : user3178505
Date : March 29 2020, 07:55 AM
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How to develop a "spin the bottle" application
By : Lou Lembcke
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Hey Check this demo. You have to calculate velocity. Which depends on touchesMoved:withEvent: and touchesEnded:withEvent:.
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Spin bottle with UIGestureRecognizer
By : Joe
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further The simple answer to this is... use a UIScrollView. From my question here... Loop UIScrollView but continue decelerating code :
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
//make the content size really big so that the targetOffset of the deceleration will never be met.
scrollView.contentSize = CGSize(width: CGRectGetWidth(scrollView.frame) * 100.0, height: CGRectGetHeight(scrollView.frame))
//set the contentOffset of the scroll view to a point in the center of the contentSize.
scrollView.setContentOffset(CGPoint(CGRectGetWidth(scrollView.frame) * 50, 0), animated: false)
}
func rotateImageView() {
//Calculate the percentage of one "frame" that is the current offset.
// each percentage of a "frame" equates to a percentage of 2 PI Rads to rotate
let minOffset = CGRectGetWidth(scrollView.frame) * 50.0
let maxOffset = CGRectGetWidth(scrollView.frame) * 51.0
let offsetDiff = maxOffset - minOffset
let currentOffset = scrollView.contentOffset.x - minOffset
let percentage = currentOffset / offsetDiff
arrowView.transform = CGAffineTransformMakeRotation(M_PI * 2 * percentage)
}
func scrollViewDidScroll(scrollView: UIScrollView) {
//the scrollView moved so update the rotation of the image
rotateImageView()
}
func scrollViewDidEndDecelerating(scrollView: UIScrollView) {
//the scrollview stopped moving.
//set the content offset back to be in the middle
//but make sure to keep the percentage (used above) the same
//this ensures the arrow is pointing in the same direction as it ended decelerating
let diffOffset = scrollView.contentOffset.x
while diffOffset >= CGRectGetWidth(scrollView.frame) {
diffOffset = diffOffset - CGRectGetWidth(scrollView.frame)
}
scrollView.setContentOffset(CGPoint(x: CGRectGetWidth(scrollView.frame) * 50 + diffOffset, y: 0), animated:false)
}
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Rotate UIImage like SPin the Bottle
By : Llakovo
Date : March 29 2020, 07:55 AM
I hope this helps . While it's better if you understand everything yourself, if you want a more concrete example the code here works Narut's post which is like the 5th response has nice clean code for what you want.
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Spin waits, spin loop and busy spin
By : Martin Hernandez
Date : March 29 2020, 07:55 AM
will be helpful for those in need Busy Spin A technique which is used in a way that it loop is running until other thread have to complete his work.
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