iOS開發，ios開發教程

iOS開發，ios開發教程
手勢移除控制器

類似於IT之家、QQ、QQ音樂移除控制器

#import "NavigationController.h"@interface NavigationController ()/** 存放每一個控制器的全屏 */@property (nonatomic, strong) NSMutableArray *images;@property (nonatomic, strong) UIImageView *lastVcView;@property (nonatomic, strong) UIView *cover;@end@implementation NavigationController- (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];    // 拖拽手勢    UIPanGestureRecognizer *recognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(dragging:)];    [self.view addGestureRecognizer:recognizer];}- (void)dragging:(UIPanGestureRecognizer *)recognizer{    // 如果只有1個子控制器,停止拖拽    if (self.viewControllers.count <= 1) return;    // 在x方向上移動的距離    CGFloat tx = [recognizer translationInView:self.view].x;    if (tx < 0) return;    if (recognizer.state == UIGestureRecognizerStateEnded || recognizer.state == UIGestureRecognizerStateCancelled) {        // 決定pop還是還原        CGFloat x = self.view.frame.origin.x;        if (x >= self.view.frame.size.width * 0.5) {            [UIView animateWithDuration:0.25 animations:^{                self.view.transform = CGAffineTransformMakeTranslation(self.view.frame.size.width, 0);            } completion:^(BOOL finished) {                [self popViewControllerAnimated:NO];                [self.lastVcView removeFromSuperview];                [self.cover removeFromSuperview];                self.view.transform = CGAffineTransformIdentity;                [self.images removeLastObject];            }];        } else {            [UIView animateWithDuration:0.25 animations:^{                self.view.transform = CGAffineTransformIdentity;            }];        }    } else {        // 移動view        self.view.transform = CGAffineTransformMakeTranslation(tx, 0);        UIWindow *window = [UIApplication sharedApplication].keyWindow;        // 添加到最後面        self.lastVcView.image = self.images[self.images.count - 2];        [window insertSubview:self.lastVcView atIndex:0];        [window insertSubview:self.cover aboveSubview:self.lastVcView];    }}/** *  產生 */- (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];}- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{    [super pushViewController:viewController animated:animated];    [self createScreenShot];}@end

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