侧滑手势移除控制器,pop

最新推荐文章于 2022-03-24 11:57:51 发布

转载最新推荐文章于 2022-03-24 11:57:51 发布 · 83 阅读

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原文链接：http://www.cnblogs.com/daaiwusehng/p/5060893.html

本文介绍如何在iOS应用中使用导航控制器实现页面滑动，并在每次滑动时保存当前屏幕截图，通过引入手势识别和屏幕截图功能，实现页面之间的平滑过渡与历史记录保存。

继承导航控制器之后

#import "NAVController.h"

@interface NAVController ()

@property (nonatomic,strong)UIPanGestureRecognizer * panRecongizer;

@property (nonatomic, strong) NSMutableArray *images;

@property (nonatomic, strong) UIImageView *lastVcView;

@property (nonatomic, strong) UIView *cover;

@end

@implementation NAVController

- (UIImageView *)lastVcView

{

if (!_lastVcView) {

UIWindow *window = [UIApplication sharedApplication].keyWindow;

UIImageView *lastVcView = [[UIImageView alloc] init];

lastVcView.frame = window.bounds;

self.lastVcView = lastVcView;

}

return _lastVcView;

}

- (UIView *)cover

{

if (!_cover) {

UIWindow *window = [UIApplication sharedApplication].keyWindow;

UIView *cover = [[UIView alloc] init];

cover.backgroundColor = [UIColor blackColor];

cover.frame = window.bounds;

cover.alpha = 0.5;

self.cover = cover;

}

return _cover;

}

- (NSMutableArray *)images

{

if (!_images) {

self.images = [[NSMutableArray alloc] init];

}

return _images;

}

- (void)viewDidLoad {

[super viewDidLoad];

}

-(void)panAction:(UIPanGestureRecognizer*)panRecongizer

{

// 如果只有1个子控制器,停止拖拽

if (self.viewControllers.count <= 1) return;

// 在x方向上移动的距离

CGFloat tx = [panRecongizer translationInView:self.view].x;

if (tx < 0) return;

if (panRecongizer.state == UIGestureRecognizerStateEnded || panRecongizer.state == UIGestureRecognizerStateCancelled) {

// 决定pop还是还原

CGFloat x = panRecongizer.view.frame.origin.x;

if (x >= self.view.frame.size.width * 0.5) {

[UIView animateWithDuration:0.25 animations:^{

panRecongizer.view.transform = CGAffineTransformMakeTranslation(self.view.frame.size.width, 0);

} completion:^(BOOL finished) {

[self popViewControllerAnimated:NO];

[self.lastVcView removeFromSuperview];

[self.cover removeFromSuperview];

panRecongizer.view.transform = CGAffineTransformIdentity;

[self.images removeLastObject];

}];

} else {

[UIView animateWithDuration:0.25 animations:^{

panRecongizer.view.transform = CGAffineTransformIdentity;

}];

}

} else {

// 移动view

panRecongizer.view.transform = CGAffineTransformMakeTranslation(tx, 0);

UIWindow *window = [UIApplication sharedApplication].keyWindow;

// 添加截图到最后面

self.lastVcView.image = self.images[self.images.count - 2];

[window insertSubview:self.lastVcView atIndex:0];

[window insertSubview:self.cover aboveSubview:self.lastVcView];

}

-(void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated

{

[super pushViewController:viewController animated:animated];

UIPanGestureRecognizer *panRecongizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panAction:)];

[viewController.view addGestureRecognizer:panRecongizer];

[self createScreenShot];

}

/**

* 产生截图

- (void)createScreenShot

{

UIGraphicsBeginImageContextWithOptions(self.view.frame.size, YES, 0.0);

[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];

UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

[self.images addObject:image];

}

- (void)viewDidAppear:(BOOL)animated

{

[super viewDidAppear:animated];

if (self.images.count > 0) return;

[self createScreenShot];

}

@end

转载于:https://www.cnblogs.com/daaiwusehng/p/5060893.html