iOS如何自定義轉(zhuǎn)場(chǎng)動(dòng)畫

這篇文章給大家分享的是有關(guān)iOS如何自定義轉(zhuǎn)場(chǎng)動(dòng)畫的內(nèi)容。小編覺(jué)得挺實(shí)用的，因此分享給大家做個(gè)參考，一起跟隨小編過(guò)來(lái)看看吧。

預(yù)備

首先，我們現(xiàn)在介紹幾個(gè)在自定義轉(zhuǎn)場(chǎng)動(dòng)畫時(shí)需要接觸的協(xié)議：

UIViewControllerAnimatedTransitioning： 實(shí)現(xiàn)此協(xié)議的實(shí)例控制轉(zhuǎn)場(chǎng)動(dòng)畫效果。UIViewControllerInteractiveTransitioning： 實(shí)現(xiàn)此協(xié)議的實(shí)例控制著利用手勢(shì)過(guò)渡時(shí)的進(jìn)度處理。

我們?cè)诙x好了實(shí)現(xiàn)上面兩個(gè)協(xié)議的類后，只需要在需要進(jìn)行轉(zhuǎn)場(chǎng)的地方，提供對(duì)應(yīng)的對(duì)象即可。

ps：下面的實(shí)例中，請(qǐng)大家忽略動(dòng)畫效果，關(guān)注實(shí)現(xiàn)。(其實(shí)是懶得去寫太多動(dòng)畫了。??♂?)

模態(tài)跳轉(zhuǎn)（Present）

場(chǎng)景

self.present(vc!, animated: true) {}self.dismiss(animated: true) {}

實(shí)現(xiàn)步驟

1. 設(shè)置將要 present 的 ViewController 的 transitioningDelegate 對(duì)象，此對(duì)象是實(shí)現(xiàn)協(xié)議 UIViewControllerTransitioningDelegate 的實(shí)例。實(shí)現(xiàn) UIViewControllerTransitioningDelegate 協(xié)議中的幾個(gè)代理方法，返回實(shí)現(xiàn)了 UIViewControllerAnimatedTransitioning 協(xié)議的動(dòng)畫效果控制類。

需要實(shí)現(xiàn)的UIViewControllerTransitioningDelegate方法：

//返回用于 present 的自定義 transition 動(dòng)畫optional func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning?//返回用于 dismiss 的自定義 transition 動(dòng)畫optional func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning?

實(shí)例

/// 第一個(gè) VC 中點(diǎn)擊跳轉(zhuǎn)func presentClick(_ sender: Any) {  let vc = self.storyboard?.instantiateViewController(withIdentifier: "PresentSecondViewController")  vc?.modalPresentationStyle = .fullScreen  vc?.transitioningDelegate = self  self.present(vc!, animated: true) {}}// 第一個(gè) VC 實(shí)現(xiàn)協(xié)議，返回控制轉(zhuǎn)場(chǎng)動(dòng)畫效果的實(shí)例extension PresentFirstViewController: UIViewControllerTransitioningDelegate { func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {  return NormalPresentAnimator() } func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {  return NormalPresentAnimator() }}

導(dǎo)航控制器跳轉(zhuǎn)（Push）

場(chǎng)景

self.navigationController?.pushViewController(vc!, animated: true)self.navigationController?.popViewController(animated: true)

實(shí)現(xiàn)步驟

1. 設(shè)置導(dǎo)航控制器 UINavigationController 的 delegate。實(shí)現(xiàn) UINavigationControllerDelegate 協(xié)議中的代理方法，返回實(shí)現(xiàn)了 UIViewControllerAnimatedTransitioning 協(xié)議的動(dòng)畫效果控制類。

需要實(shí)現(xiàn)的UINavigationControllerDelegate方法：

optional func navigationController(_ navigationController: UINavigationController,        animationControllerFor operation: UINavigationController.Operation,        from fromVC: UIViewController,        to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning?

實(shí)例

class PushFirstViewController: UIViewController { override func viewDidLoad() {  super.viewDidLoad()  self.navigationController?.delegate = self } @IBAction func pushClick(_ sender: Any) {  let vc = self.storyboard?.instantiateViewController(withIdentifier: "PushSecondViewController")  self.navigationController?.pushViewController(vc!, animated: true) }}extension PushFirstViewController: UINavigationControllerDelegate { //返回自定義過(guò)渡動(dòng)畫 func navigationController(_ navigationController: UINavigationController,        animationControllerFor operation: UINavigationController.Operation,        from fromVC: UIViewController,        to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning? {  if operation == .pop && fromVC is PushFirstViewController {   return nil  }  return NormalPushAnimator() }}

UITabbarController

在前面的兩個(gè)專場(chǎng)實(shí)現(xiàn)中，我們?cè)谛枰D(zhuǎn)場(chǎng)的類中分別實(shí)現(xiàn)了UIViewControllerTransitioningDelegate 及 UINavigationControllerDelegate 方法，在這兩個(gè)協(xié)議中，還有這樣幾個(gè)方法：

/// UIViewControllerTransitioningDelegateoptional func interactionControllerForPresentation(using animator: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning?optional func interactionControllerForDismissal(using animator: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning?/// UINavigationControllerDelegateoptional func navigationController(_ navigationController: UINavigationController,          interactionControllerFor animationController: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning?

上面這幾個(gè)方法呢？其實(shí)就是我們通過(guò)利用手勢(shì)轉(zhuǎn)場(chǎng)時(shí)過(guò)渡的進(jìn)度處理方法。我們需要在代理方法中返回一個(gè)實(shí)現(xiàn)了 UIViewControllerInteractiveTransitioning 協(xié)議的對(duì)象來(lái)對(duì)轉(zhuǎn)場(chǎng)進(jìn)度進(jìn)行控制。下面的 UITabbarController 中我就實(shí)現(xiàn)一個(gè)利用手勢(shì)控制轉(zhuǎn)場(chǎng)的例子。 Present 及 Push/Pop 按照相同的思路實(shí)現(xiàn)即可。

場(chǎng)景

UITabbarController 在默認(rèn)的狀態(tài)下，切換控制器時(shí)是沒(méi)有動(dòng)畫效果的。如果需要?jiǎng)赢嬓Ч脑?，需要我們進(jìn)行自定義。

實(shí)現(xiàn)步驟

1. 設(shè)置 UITabbarController 的 delegate。實(shí)現(xiàn) UITabBarControllerDelegate 協(xié)議中的代理方法，返回實(shí)現(xiàn)了 UIViewControllerAnimatedTransitioning 協(xié)議的動(dòng)畫效果控制類，以及返回實(shí)現(xiàn)了 UIViewControllerInteractiveTransitioning 協(xié)議的轉(zhuǎn)場(chǎng)進(jìn)度控制類。

/// 返回實(shí)現(xiàn)了 UIViewControllerAnimatedTransitioning 協(xié)議的實(shí)例func tabBarController(_ tabBarController: UITabBarController,       animationControllerForTransitionFrom fromVC: UIViewController,       to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning?/// 返回實(shí)現(xiàn)了 UIViewControllerInteractiveTransitioning 協(xié)議的實(shí)例func tabBarController(_ tabBarController: UITabBarController,       interactionControllerFor animationController: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning?

實(shí)例

class TabbarController: UITabBarController, UITabBarControllerDelegate { override func viewDidLoad() {  super.viewDidLoad()  self.delegate = self}func tabBarController(_ tabBarController: UITabBarController,       animationControllerForTransitionFrom fromVC: UIViewController,       to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning? { if self.selectedIndex == 0 {  return TabbarAnimator(edge: .right) } else {  return TabbarAnimator(edge: .left) }}func tabBarController(_ tabBarController: UITabBarController,       interactionControllerFor animationController: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning? { if self.panGesture.state == .began || self.panGesture.state == .changed {  return TabbarInteractionTransition(pan: self.panGesture) } else {  return nil }}

三方框架——Lottie

介紹

Lottie 是 Android 和 iOS 的移動(dòng)庫(kù)，用 bodymovin 解析 Adobe After Effects 導(dǎo)出為 json 的動(dòng)畫并在移動(dòng)設(shè)備上生成矢量動(dòng)畫。設(shè)計(jì)師可以輕松的創(chuàng)建漂亮(復(fù)雜)的動(dòng)畫，無(wú)需程序員辛苦地手動(dòng)去創(chuàng)建及調(diào)試。

場(chǎng)景

實(shí)現(xiàn)一些特殊的轉(zhuǎn)場(chǎng)，且程序員無(wú)足夠時(shí)間調(diào)試動(dòng)畫時(shí)。

實(shí)現(xiàn)步驟

1. 在工程中導(dǎo)入 Lottie 框架。在需要轉(zhuǎn)場(chǎng)的類中，將 Lottie import。因?yàn)?Lottie 實(shí)現(xiàn)的轉(zhuǎn)場(chǎng)實(shí)際上是 Present 的轉(zhuǎn)場(chǎng)，所以設(shè)置將要 Present 的控制器的 transitioningDelegate。實(shí)現(xiàn) UIViewControllerTransitioningDelegate 協(xié)議中的幾個(gè)代理方法，返回利用轉(zhuǎn)場(chǎng)動(dòng)畫 json 文件初始化的 LOTAnimationTransitionController 的實(shí)例。

ps：Lottie 轉(zhuǎn)場(chǎng)的 LOTAnimationTransitionController 在 3.0.0 版本后被移除，所以需要使用 Lottie 做轉(zhuǎn)場(chǎng)時(shí)，需要在導(dǎo)入時(shí)，指定版本號(hào)為更早的版本。我這里使用的是 2.5.3。

實(shí)例

/// 第一個(gè) VCfunc presentClick(_ sender: Any) { let vc = self.storyboard?.instantiateViewController(withIdentifier: "LottieSecondViewController") vc?.transitioningDelegate = self self.present(vc!, animated: true) {}}/// 實(shí)現(xiàn) UIViewControllerTransitioningDelegate，返回 LOTAnimationTransitionController 的實(shí)例extension LottieFirstViewController: UIViewControllerTransitioningDelegate { func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {  let transitionController = LOTAnimationTransitionController(animationNamed: "Count",                 fromLayerNamed: "",                 toLayerNamed: "",                 applyAnimationTransform: false)  return transitionController } func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {  let transitionController = LOTAnimationTransitionController(animationNamed: "Three",                 fromLayerNamed: "",                 toLayerNamed: "",                 applyAnimationTransform: false)  return transitionController }}

感謝各位的閱讀！關(guān)于“iOS如何自定義轉(zhuǎn)場(chǎng)動(dòng)畫”這篇文章就分享到這里了，希望以上內(nèi)容可以對(duì)大家有一定的幫助，讓大家可以學(xué)到更多知識(shí)，如果覺(jué)得文章不錯(cuò)，可以把它分享出去讓更多的人看到吧！