我想在swift 3.0中使用单指一次旋转和调整视图大小我已经在 objective-c 中找到了很多解决方案，但我仍然坚持将其转换为swift。我使用了以下代码旋转视图
let panRotateGesture = UIPanGestureRecognizer(target: self, action: #selector(self.rotateViewPanGesture))
rotateView?.addGestureRecognizer(panRotateGesture)
panRotateGesture.require(toFail: panRotateGesture)
textView?.addSubview(rotateView!)
RotateViewPanGesture功能
func rotateViewPanGesture(_ recognizer: UIPanGestureRecognizer) {
if recognizer.state == .began {
deltaAngle = atan2(Float(recognizer.location(in: textView).y - textView!.center.y), Float(recognizer.location(in: textView).x - textView!.center.x))
startTransform = (textView?.transform)!
} else if recognizer.state == .changed {
let ang: Float = atan2(Float(recognizer.location(in: textView!.superview).y - textView!.center.y), Float(recognizer.location(in: textView!.superview).x - textView!.center.x))
let angleDiff: Float = deltaAngle - ang
textView?.transform = CGAffineTransform(rotationAngle: -(CGFloat)(angleDiff))
textView?.setNeedsDisplay()
} else if recognizer.state == .ended {
deltaAngle = atan2(Float(recognizer.location(in: textView).y - textView!.center.y), Float(recognizer.location(in: textView).x - textView!.center.x))
startTransform = (textView?.transform)!
textView?.setNeedsDisplay()
}
}
此处 textView 是我的观点，我想旋转和调整大小。
以下是调整视图大小
的代码 func resizeViewPanGesture(_ recognizer: UIPanGestureRecognizer) {
let translation = recognizer.translation(in: recognizer.view)
if let view = recognizer.view {
view.transform = (textView?.transform.translatedBy(x: translation.x, y: translation.y))!
}
recognizer.setTranslation(CGPoint.zero, in: recognizer.view)
}
}
但它不适合我。请帮帮我这个，如何在swift 3中一次用单指旋转和调整视图大小
答案 0 :(得分：2)
我使用以下代码解决了我的问题。它帮助我用一根手指旋转和调整图像大小。
func stickerResizeGesture(_ recognizer: UIPanGestureRecognizer) {
let superview = recognizer.view?.superview
stickerContainerView = superview
for element in (superview?.subviews)! {
if element.accessibilityHint == "Main Image" {
imgSticker = element as! UIImageView
}
if element.accessibilityHint == "Delete" {
deleteView = element as? UIImageView
}
if element.accessibilityHint == "Rotate" {
rotateView = element as? UIImageView
}
if element.accessibilityHint == "Resize" {
resizeView = element as? UIImageView
}
}
let touchLocation = recognizer.location(in: stickerContainerView?.superview)
let center = CalculateFunctions.CGRectGetCenter((stickerContainerView?.frame)!)
if recognizer.state == .began {
prevPoint = recognizer.location(in: stickerContainerView?.superview)
//Rotate
deltaAngle = Float(atan2(touchLocation.y - center.y, touchLocation.x - center.x) - CalculateFunctions.CGAffineTrasformGetAngle(self.startTransform))
initialBounds = stickerContainerView?.bounds
initialDistance = CalculateFunctions.CGpointGetDistance(center, point2: touchLocation)
//stickerContainerView?.setNeedsDisplay()
} else if recognizer.state == .changed {
if (stickerContainerView?.bounds.size.width)! < CGFloat(100.0) {
stickerContainerView?.bounds = CGRect(x: (stickerContainerView?.bounds.origin.x)!,
y: (stickerContainerView?.bounds.origin.y)!,
width: (stickerContainerView?.bounds.size.width)!,
height: (stickerContainerView?.bounds.size.width)!)
imgSticker.frame = CGRect(x: 12,
y: 12,
width: (stickerContainerView?.bounds.size.width)! - (resizeView?.frame.width)!,
height: (stickerContainerView?.bounds.size.height)! - (resizeView?.frame.height)!)
resizeView?.frame = CGRect(x: (stickerContainerView?.bounds.size.width)! - (resizeView?.frame.width)!,
y: (stickerContainerView?.bounds.size.height)! - (resizeView?.frame.height)!,
width: (resizeView?.frame.width)!,
height: (resizeView?.frame.height)!)
rotateView?.frame = CGRect(x: 0,
y: (stickerContainerView?.bounds.size.height)! - (rotateView?.frame.height)!,
width: (rotateView?.frame.width)!,
height: (rotateView?.frame.height)!)
deleteView?.frame = CGRect(x: 0,
y: 0,
width: (deleteView?.frame.width)!,
height: (deleteView?.frame.height)!)
} else if (stickerContainerView?.bounds.size.height)! < CGFloat(100.0) {
stickerContainerView?.bounds = CGRect(x: (stickerContainerView?.bounds.origin.x)!,
y: (stickerContainerView?.bounds.origin.y)!,
width: (stickerContainerView?.bounds.size.height)!,
height: (stickerContainerView?.bounds.size.height)!)
imgSticker.frame = CGRect(x: 12, y: 12,
width: (stickerContainerView?.bounds.size.width)! - (resizeView?.frame.width)!,
height: (stickerContainerView?.bounds.size.height)! - (resizeView?.frame.height)!)
resizeView?.frame = CGRect(x: (stickerContainerView?.bounds.size.width)! - (resizeView?.frame.width)!,
y: (stickerContainerView?.bounds.size.height)! - (resizeView?.frame.height)!,
width: (resizeView?.frame.width)!,
height: (resizeView?.frame.height)!)
rotateView?.frame = CGRect(x: 0, y: (stickerContainerView?.bounds.size.height)! - (rotateView?.frame.height)!,
width: (rotateView?.frame.width)!,
height: (rotateView?.frame.height)!)
deleteView?.frame = CGRect(x: 0,
y: 0,
width: (deleteView?.frame.width)!,
height: (deleteView?.frame.height)!)
} else {
let point: CGPoint = recognizer.location(in: stickerContainerView!.superview)
let newHeight = (stickerContainerView?.bounds.size.width)! + CGFloat(point.y - prevPoint.y)
let newWidth = (stickerContainerView?.bounds.size.height)! + CGFloat(point.y - prevPoint.y)
if newHeight < CGFloat(100.0) && newWidth < CGFloat(100.0) {
stickerContainerView?.bounds = CGRect(x: stickerContainerView!.bounds.origin.x,
y: stickerContainerView!.bounds.origin.y,
width: 100.0,
height: 100.0)
} else {
stickerContainerView?.bounds = CGRect(x: stickerContainerView!.bounds.origin.x,
y: stickerContainerView!.bounds.origin.y,
width: newWidth,
height: newHeight)
}
imgSticker.frame = CGRect(x: 12,
y: 12,
width: (stickerContainerView?.bounds.size.width)! - (resizeView?.frame.width)!,
height: (stickerContainerView?.bounds.size.height)! - (resizeView?.frame.height)!)
resizeView?.frame = CGRect(x: (stickerContainerView?.bounds.size.width)! - (resizeView?.frame.width)!,
y: (stickerContainerView?.bounds.size.height)! - (resizeView?.frame.height)!,
width: (resizeView?.frame.width)!,
height: (resizeView?.frame.height)!)
rotateView?.frame = CGRect(x: 0,
y: (stickerContainerView?.bounds.size.height)! - 25,
width: (rotateView?.frame.width)!,
height: (rotateView?.frame.height)!)
deleteView?.frame = CGRect(x: 0,
y: 0,
width: (deleteView?.frame.width)!,
height: (deleteView?.frame.height)!)
prevPoint = recognizer.location(in: stickerContainerView?.superview)
}
// Rotate
let ang: Float = atan2(Float(touchLocation.y - center.y), Float(touchLocation.x - center.x))
let angleDiff = deltaAngle - ang
stickerContainerView?.transform = CGAffineTransform(rotationAngle: -(CGFloat)(angleDiff))
stickerContainerView?.setNeedsDisplay()
} else if recognizer.state == .ended {
prevPoint = recognizer.location(in: stickerContainerView?.superview)
//Rotate
let ang: Float = atan2(Float(touchLocation.y - center.y), Float(touchLocation.x - center.x))
startTransform = (stickerContainerView?.transform)!
// stickerContainerView?.setNeedsDisplay()
}
}