如何快速移动图像 [英] How to move image in circle swift
本文介绍了如何快速移动图像的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
有人可以向我解释如何创建圆的路径并在其周围移动图像。
我需要什么:
let circlePath = UIBezierPath(arcCenter:CGPoint(x:100,y:100),radius:CGFloat(20),startAngle:CGFloat(0),endAngle:CGFloat(M_PI * 2),顺时针:正确)
我发现圆的路径,但是其余的我都不知道去做。我是iOS开发的新手。
而且,我需要在打开页面时开始执行此操作。
解决方案
检查此代码,objectToMove是一个来自storyBoard的UIView进行测试,这里我使用的是您的路径代码,但是我已经添加了更多半径
import UIKit
类ViewController:UIViewController {
@IBOutlet弱var objectToMove :UIView!
覆盖func viewDidLoad(){
super.viewDidLoad()
//加载视图后,通常从笔尖进行其他任何设置。
}
覆盖func viewDidAppear(animated:Bool){
super.viewDidAppear(animated)
let orbit = CAKeyframeAnimation(keyPath: position )
var affineTransform = CGAffineTransformMakeRotation(0.0)
affineTransform = CGAffineTransformRotate(affineTransform,CGFloat(M_PI))
let circlePath = UIBezierPath(arcCenter:CGPoint(x:100-(100/2), y:100-(100/2)),半径:CGFloat(100),startAngle:CGFloat(0),endAngle:CGFloat(M_PI * 2),顺时针:true)
orbit.path = circlePath.CGPath
orbit.duration = 4
orbit.additive = true
orbit.repeatCount = 100
orbit.calculationMode = kCAAnimationPaced
orbit.rotationMode = kCAAnimationRotateAuto
objectToMove.layer .addAnimation(orbit,forKey: orbit)
}
覆盖func didReceiveMemoryWarning(){
super.didReceiveMemoryWarning()
// d浪费任何可以重新创建的资源。
}
}
我希望这样可以帮助您,
Can anybody explain to me how I can create the path of circle and move an image around it.
What I need:
let circlePath = UIBezierPath(arcCenter: CGPoint(x: 100,y: 100), radius: CGFloat(20), startAngle: CGFloat(0), endAngle:CGFloat(M_PI * 2), clockwise: true)
I discovered how do the path of circle, but the rest I don't know to do. I'm new to iOS development.
And, I need this action begin when I open the page.
解决方案
Check this code, the objectToMove is an UIView from storyBoard to test, here I am using your path code but I had added more radius
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var objectToMove: UIView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
let orbit = CAKeyframeAnimation(keyPath: "position")
var affineTransform = CGAffineTransformMakeRotation(0.0)
affineTransform = CGAffineTransformRotate(affineTransform, CGFloat(M_PI))
let circlePath = UIBezierPath(arcCenter: CGPoint(x: 100 - (100/2),y: 100 - (100/2)), radius: CGFloat(100), startAngle: CGFloat(0), endAngle:CGFloat(M_PI * 2), clockwise: true)
orbit.path = circlePath.CGPath
orbit.duration = 4
orbit.additive = true
orbit.repeatCount = 100
orbit.calculationMode = kCAAnimationPaced
orbit.rotationMode = kCAAnimationRotateAuto
objectToMove.layer .addAnimation(orbit, forKey: "orbit")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
I hope this helps you, Regards
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