iOS体验性优化之RTL适配右滑返回的实现

简述

所谓RTL方向布局就是right to left direction。也就是界面中的元素总是按从右往左的方向进行排列布局,大部分国家的书写以及排列习惯都是从左往右,是LTR方向布局,而对于一些阿拉伯国家,文字的书写以及展示的顺序都是从右往左方向的。

iOS的导航支持左滑手势返回上一个界面,这是果粉普遍喜欢的一个特性,iOS7之后的APP适配大多会保留这一特性,慢慢的大多用户已经有了这种操作习惯,对于iPhone的无虚拟键,这种操作也能增加比较友好的用户体验。

在公司新项目之前,没有考虑过多语言RTL的适配方案,开始做的时候UI方面基本实现用一套布局代码支持RTL的两种布局方向。但是真正拿在手里把玩体验时才真切的感受到没有侧滑返回的RTL有多么的不爽。几经查找并没有找到可参考的合适方案,可能国内做多语言适配的技术圈本身就小,适配RTL的就显得更加的稀有了。

希望能帮助到有需要的人,或者有更好的思路可以联系共同探讨。

思路

查不到可参考的资料,只能自己想一想比较合适的方式,恰好在实现一个首页列表跳转详情页时候,解决特殊的转场动画,突然就有了灵感。可能应该有更好的实现方式,现将我的方式展现给大家。

解决方案

1、关键词: UIPercentDrivenInteractiveTransition finishInteractiveTransition cancelInteractiveTransition

2、关键方法:updateInteractiveTransition:

3、实现方式:暂时以文字代码描述,具体可参考之前共享的RTL解决方案,里面有相关源码,末尾处会贴出路径。

具体实现

1、处理navigation代理

使用runtime方式或者基类方式,viewdidappea每次设置nav的代理为自己,viewdiddisappear清空代理(Yoins新版中使用RTL框架中的分类)

- (void)RTL_viewWillAppear:(BOOL)animated

{

[self RTL_viewWillAppear:animated];

self.navigationController.delegate = self;

}

- (void)RTL_viewWillDisappear:(BOOL)animated

{

[self RTL_viewWillDisappear:animated];

if (self.navigationController.delegate == self) {

self.navigationController.delegate = nil;

}

}

2、右滑手势添加

基类初始化时,RTL环境下添加右滑手势,关闭左滑手势,实现最基本的右滑返回。

Navigation 中实现

- (void)RTL_ViewWillAppear:(BOOL)animate

{

// self.view.backgroundColor = [UIColor whiteColor];

// // Do any additional setup after loading the view.

if (![[RTLManager appearance]RTL]) {

self.interactivePopGestureRecognizer.delegate = self;

}

self.interactivePopGestureRecognizer.enabled = ![[RTLManager appearance]RTL];

[self RTL_ViewWillAppear:animate];

}

3、实现手势交互(重点)

基类VC中 增加一个基础属性,保存临时转场上下文

@property (span ,nonatomic)UIPercentDrivenInteractiveTransition *transitonContext;

在VC右滑动作触发事件中,处理转场动画进度

- (void)handlePanGesture:(UIScreenEdgePanGestureRecognizer *)pan

{

// NSLog(@"_____%zd-----%zd",self.navigationController.childViewControllers.count,self.navigationController.viewControllers.count);

// NSLog(@"----%@",NSStringFromCGPoint([pan translationInView:self.view]));

CGFloat progress = ABS([pan translationInView:self.view].x) / (self.view.bounds.size.width * 1.0);

progress = MIN(1.0, MAX(0.0, progress));

if (pan.state == UIGestureRecognizerStateBegan) {

// 创建过渡对象,弹出viewController

self.transitonContext = [[UIPercentDrivenInteractiveTransition alloc] init];

[self.navigationController popViewControllerAnimated:YES];

}else if (pan.state == UIGestureRecognizerStateChanged) {

// 更新 interactive transition 的进度

[self.transitonContext updateInteractiveTransition:progress];

}else if (pan.state == UIGestureRecognizerStateEnded || pan.state == UIGestureRecognizerStateCancelled) {

// 完成或者取消过渡

if (progress > 0.5) {

[self.transitonContext finishInteractiveTransition];

}

else {

[self.transitonContext cancelInteractiveTransition];

}

self.transitonContext = nil;

}

}

- (id<UIViewControllerInteractiveTransitioning>)navigationController:(UINavigationController *)navigationController interactionControllerForAnimationController:(id<UIViewControllerAnimatedTransitioning>)animationController{

if (self.transitonContext) {

return self.transitonContext;

}

else {

return nil;

}

}

最后就是实现自定的各种转场动画了,可以简单模仿系统的滑动切换转场,具体处理在下面VC实现的方法中,返回一个处理转场的实例即可

- (id<UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController animationControllerForOperation:(UINavigationControllerOperation)operation fromViewController:(UIViewController *)fromVC toViewController:(UIViewController *)toVC

4、贴一个简单的动画处理类

@implementation RTLPushAnimation

- (NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext

{

return 0.5;

}

- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext

{

UIViewController *fromVC = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];

UIViewController *toVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];

UIView *container = transitionContext.containerView;

UIView *tmpV = [fromVC.view snapshotViewAfterScreenUpdates:YES];

[container addSubview:toVC.view];

toVC.view.transform = CGAffineTransformMakeTranslation(-toVC.view.bounds.size.width, 0);

[container addSubview:tmpV];

[UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{

tmpV.transform = CGAffineTransformMakeTranslation(toVC.view.bounds.size.width, 0);

toVC.view.transform = CGAffineTransformIdentity;

} completion:^(BOOL finished) {

[tmpV removeFromSuperview];

[transitionContext completeTransition:YES];

}];

}

@end

@implementation RTLPopAnimation

- (NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext

{

return 0.5;

}

- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext

{

UIViewController *fromVC = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];

UIViewController *toVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];

UIView *container = transitionContext.containerView;

UIView *tmpV = [fromVC.view snapshotViewAfterScreenUpdates:YES];

[container addSubview:toVC.view];

toVC.view.transform = CGAffineTransformMakeTranslation(toVC.view.bounds.size.width, 0);

[container addSubview:tmpV];

[UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{

tmpV.transform = CGAffineTransformMakeTranslation(-toVC.view.bounds.size.width, 0);

toVC.view.transform = CGAffineTransformIdentity;

} completion:^(BOOL finished) {

[tmpV removeFromSuperview];

toVC.view.transform = CGAffineTransformIdentity;

[transitionContext completeTransition:!transitionContext.transitionWasCancelled];

}];

}

@end

end

大家或许有更好的处理方案,可以一切探讨下。

总结

以上是 iOS体验性优化之RTL适配右滑返回的实现 的全部内容, 来源链接: utcz.com/z/351039.html

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