DirectedPinchGestureRecognizer 1.0.0

DirectedPinchGestureRecognizer 1.0.0

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测试已测试✗
语言语言 SwiftSwift
许可证 MIT
发布最新发布2016年11月
SwiftSwift版本3.0
SPM支持SPM✗

由 Daniel Clelland 维护。

DirectedPinchGestureRecognizer 1.0.0

  • 由
  • Daniel Clelland

DirectedPinchGestureRecognizer

DirectedPinchGestureRecognizer 是一个 UIPinchGestureRecognizer 子类，在 Swift 3 中提供了更丰富的 API 来处理捏合手势。

let gestureRecognizer = DirectedPinchGestureRecognizer()
gestureRecognizer.delegate = self
view.addGestureRecognizer(gestureRecognizer)

安装

pod 'DirectedPinchGestureRecognizer', '~> 1.0'

使用

let gestureRecognizer = DirectedPinchGestureRecognizer()
gestureRecognizer.delegate = self
view.addGestureRecognizer(gestureRecognizer)

功能

✓ 跟踪手势的初始状态

if (gestureRecognizer.initialAxis == .horizontal) {
    if (gestureRecognizer.axis == .vertical) {
        print("Gesture recognizer started pinching horizontally and then rotated to a vertical axis")
    }
}

✓ 强制手势的起始方向和轴x

func gestureRecognizerShouldBegin(gestureRecognizer: UIGestureRecognizer) -> Bool {
    switch gestureRecognizer {
    case let pinchGestureRecognizer as DirectedPinchGestureRecognizer where pinchGestureRecognizer == self.pinchGestureRecognizer
        return pinchGestureRecognizer.direction == .outwards && pinchGestureRecognizer.axis == .vertical
    default:
        return true
    }
}

✓ 为 start、update、cancel 和 finish 事件实现代理协议方法

func directedPinchGestureRecognizer(didStart gestureRecognizer: DirectedPinchGestureRecognizer) {
    print("Gesture recognizer started")
}

func directedPinchGestureRecognizer(didUpdate gestureRecognizer: DirectedPinchGestureRecognizer) {
    print("Gesture recognizer updated")
}

func directedPinchGestureRecognizer(didCancel gestureRecognizer: DirectedPinchGestureRecognizer) {
    print("Gesture recognizer cancelled")
}

func directedPinchGestureRecognizer(didFinish gestureRecognizer: DirectedPinchGestureRecognizer) {
    print("Gesture recognizer finished")
}

✓ 为 location、locations、direction、axis、linearScale（以像素为单位的缩放）和 geometricScale（无量纲单位）提供便利方法

let location = gestureRecognizer.location // CGPoint?
let locations = gestureRecognizer.locations // (CGPoint, CGPoint)?
let direction = gestureRecognizer.direction // DirectedPinchGestureRecognizer.Direction?
let axis = gestureRecognizer.axis // DirectedPinchGestureRecognizer.Axis?
let linearScale = gestureRecognizer.linearScale(inAxis: .vertical, andDirection: .outwards) // CGFloat
let geometricScale = gestureRecognizer.geometricrScale(inAxis: .vertical, andDirection: .outwards) // CGFloat

✓ 为强制最小线性/几何缩放提供 IBDesignable 参数

gestureRecognizer.minimumLinearScale = 64.0
gestureRecognizer.minimumGeometricScale = 1.0