Brief description
The so-called RTL direction layout is right to left direction. That is, the elements in the interface are always arranged from right to left. Most countries' writing and arrangement habits are from left to right, and are arranged in the LTR direction. For some Arab countries, the writing and display order of words are from right to left.
iOS's navigation supports left swipe gesture to return to the previous interface, which is a feature that Apple fans generally like. Most APP adaptations after iOS7 will retain this feature. Gradually, most users have already developed this operating habit. For iPhone without virtual keys, this operation can also increase the friendly user experience.
Before the company's new project, we did not consider the adaptation scheme of multi-language RTL. When we started working, we basically implemented two layout directions of RTL with a set of layout codes. But when I really hold it in my hand and experience it, I can really feel how unhappy the RTL without side-sliding is. After searching for it, no suitable solution can be found. Perhaps the domestic technology circle for multi-language adaptation is small, so it seems even rarer to adapt to RTL.
I hope it can help people in need, or have better ideas to contact and discuss together.
Ideas
If you can't find the information you can refer to, you can only think of a more appropriate way. Just when you realize the homepage list jump to the details page, you will solve the special transition animation and suddenly you will have inspiration. There may be a better way to implement it, and now show my method to everyone.
Solution
1. Keywords: UIPercentDrivenInteractiveTransition finishInteractiveTransition cancelInteractiveTransition
2. Key method: updateInteractiveTransition:
3. Implementation method: For the time being, please refer to the previously shared RTL solution, which contains the relevant source code and the path will be posted at the end.
Specific implementation
1. Handle navigation agent
Use the runtime method or base class method, viewdidappea sets the Nav proxy as itself every time, viewdiddisappear clears the proxy (the new version of Yoins uses the classification in the RTL framework)
- (void)RTL_viewWillAppear:(BOOL)animated
{
[self RTL_viewWillAppear:animated];
= self;
}
- (void)RTL_viewWillDisappear:(BOOL)animated
{
[self RTL_viewWillDisappear:animated];
if ( == self) {
= nil;
}
}
2. Add a right swipe gesture
When initializing the base class, add a right swipe gesture in the RTL environment, close the left swipe gesture, and achieve the most basic right swipe return.
Implemented in Navigation
- (void)RTL_ViewWillAppear:(BOOL)animate
{
// = [UIColor whiteColor];
// // Do any additional setup after loading the view.
if (![[RTLManager appearance]RTL]) {
= self;
}
= ![[RTLManager appearance]RTL];
[self RTL_ViewWillAppear:animate];
}
3. Realize gesture interaction (key point)
Add a basic attribute to the base class VC to save the temporary transition context
@property (strong ,nonatomic)UIPercentDrivenInteractiveTransition *transitonContext;
In the VC right swipe action trigger event, handle transition animation progress
- (void)handlePanGesture:(UIScreenEdgePanGestureRecognizer *)pan
{
// NSLog(@"_____%zd-----%zd",,);
// NSLog(@"----%@",NSStringFromCGPoint([pan translationInView:]));
CGFloat progress = ABS([pan translationInView:].x) / ( * 1.0);
progress = MIN(1.0, MAX(0.0, progress));
if ( == UIGestureRecognizerStateBegan) {
// Create a transition object and pop up viewController = [[UIPercentDrivenInteractiveTransition alloc] init];
[ popViewControllerAnimated:YES];
}else if ( == UIGestureRecognizerStateChanged) {
// Update the progress of interactive transition [ updateInteractiveTransition:progress];
}else if ( == UIGestureRecognizerStateEnded || == UIGestureRecognizerStateCancelled) {
// Complete or cancel the transition if (progress > 0.5) {
[ finishInteractiveTransition];
}
else {
[ cancelInteractiveTransition];
}
= nil;
}
}
- (id<UIViewControllerInteractiveTransitioning>)navigationController:(UINavigationController *)navigationController interactionControllerForAnimationController:(id<UIViewControllerAnimatedTransitioning>)animationController{
if () {
return ;
}
else {
return nil;
}
}
Finally, we can implement various custom transition animations. We can simply imitate the system's sliding switching transition. In the following VC implementation method, we can return an instance of processing transitions.
- (id<UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController animationControllerForOperation:(UINavigationControllerOperation)operation fromViewController:(UIViewController *)fromVC toViewController:(UIViewController *)toVC
4. Post a simple animation processing class
@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 = ;
UIView *tmpV = [ snapshotViewAfterScreenUpdates:YES];
[container addSubview:];
= CGAffineTransformMakeTranslation(-, 0);
[container addSubview:tmpV];
[UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
= CGAffineTransformMakeTranslation(, 0);
= 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 = ;
UIView *tmpV = [ snapshotViewAfterScreenUpdates:YES];
[container addSubview:];
= CGAffineTransformMakeTranslation(, 0);
[container addSubview:tmpV];
[UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
= CGAffineTransformMakeTranslation(-, 0);
= CGAffineTransformIdentity;
} completion:^(BOOL finished) {
[tmpV removeFromSuperview];
= CGAffineTransformIdentity;
[transitionContext completeTransition:!];
}];
}
@end
end
You may have a better solution, so you can discuss everything.
Summarize
The above is the entire content of this article. I hope that the content of this article has certain reference value for everyone's study or work. If you have any questions, you can leave a message to communicate. Thank you for your support.