IOS開發—IOS自訂任意位置右滑POP視圖控制器

標籤：ios開發   右滑手勢出棧   自訂pop出棧   任意位置右滑出棧   uinavagationcontroll   

IOS自訂任意位置右滑POP視圖控制器 IOS7.0之後系統提供了原生的從左邊緣滑動pop出棧的方法，也可以自訂左邊緣pop出棧，將在下一篇介紹，本篇介紹通過添加手勢的方法實現IOS當前螢幕任意位置（非指定左邊緣）右滑pop視圖控制器出棧。代碼如下：

//// LXXPopViewController.m//  任意點右滑Pop////  Created by Lotheve on 15/6/12.//  Copyright (c) 2015年Lotheve. All rights reserved.//

#import "LXXPopViewController.h"#define KEYWINDOW[UIApplication sharedApplication].keyWindow @interface LXXPopViewController ()@property (nonatomic,strong) NSMutableArray *snapshotArray;@property (nonatomic, strong) UIView *backView;@property (nonatomic, strong) UIImageView *imageView;@property (nonatomic, strong) UIPanGestureRecognizer *pan;@property (nonatomic, assign) CGPoint startPoint;@property (nonatomic, assign) CGPoint endPoint;@end @implementation LXXPopViewController - (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{    if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {        //資料初始化        _snapshotArray = [NSMutableArray array];    }    return self;}

- (void)viewDidLoad {    [super viewDidLoad];     //添加pop手勢    _pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panAction:)];    //???: 什麼用/**這句話的作用是:在手勢沒有失敗之前，不接受其他的touch事件**/    [self.view addGestureRecognizer:_pan];}<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);"> </span>

- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{    //截屏並儲存UIGraphicsBeginImageContextWithOptions(CGSizeMake(self.view.frame.size.width, self.view.frame.size.height), NO, 1);    [self.view drawViewHierarchyInRect:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height) afterScreenUpdates:NO];    UIImage *snapshot = UIGraphicsGetImageFromCurrentImageContext();    UIGraphicsEndImageContext();    [_snapshotArray addObject:snapshot];    [super pushViewController:viewController animated:animated];}

- (UIViewController*)popViewControllerAnimated:(BOOL)animated{    [_snapshotArray removeLastObject];    return [super popViewControllerAnimated:animated];}

#pragma mark - privatemethods- (void)panAction:(UIPanGestureRecognizer *)panGestureRecognizer{    if (self.viewControllers.count == 1) {        return;    }    if (panGestureRecognizer.state == UIGestureRecognizerStateBegan) {        NSLog(@"開始滑動");        self.startPoint = [panGestureRecognizer locationInView:KEYWINDOW];        if (!_backView) {            _backView = [[UIView alloc]initWithFrame:[UIScreen mainScreen].bounds];            _backView.backgroundColor = [UIColor blackColor];        }        if (!_imageView) {            _imageView = [[UIImageView alloc]initWithFrame:[UIScreen mainScreen].bounds];            _imageView.backgroundColor = [UIColor clearColor];            _imageView.image = [_snapshotArray lastObject];        }        [_backView addSubview:_imageView];        [self.view.superview insertSubview:_backView belowSubview:self.view];           }else if (panGestureRecognizer.state == UIGestureRecognizerStateEnded){        NSLog(@"結束滑動");        self.endPoint = [panGestureRecognizer locationInView:KEYWINDOW];        [self judgeWhetherToPop];    }else{        CGPoint currentPoint =[panGestureRecognizer locationInView:KEYWINDOW];        CGFloat moveX = currentPoint.x - self.startPoint.x;        [self moveViewMaskWithX:moveX];    }}

//行動裝置檢視- (void)moveViewMaskWithX:(CGFloat)moveX{    if (moveX >= 0 && moveX <= [UIScreen mainScreen].bounds.size.width) {        CGRect frame = self.view.frame;        frame.origin.x = moveX;        self.view.frame = frame;        //透明度漸層        float alpha = (moveX/[UIScreen mainScreen].bounds.size.width)*2.0/3+1.0/3;        _imageView.alpha = alpha;        //縮放        float scale = (moveX/3200)+0.9;        _imageView.transform = CGAffineTransformMakeScale(scale, scale);    }}//判斷並執行是否pop- (void)judgeWhetherToPop{    if (self.endPoint.x - self.startPoint.x > 50) {        [UIView animateWithDuration:0.3 animations:^{            [self moveViewMaskWithX:[UIScreen mainScreen].bounds.size.width];        } completion:^(BOOL finished) {            [self popViewControllerAnimated:NO];            [_backView removeFromSuperview];            _backView = nil;            _imageView = nil;            CGRect frame = self.view.frame;            frame.origin.x = 0;            self.view.frame = frame;        }];    }else{        [UIView animateWithDuration:0.3 animations:^{            [self moveViewMaskWithX:0];        } completion:^(BOOL finished) {            [_backView removeFromSuperview];            _backView = nil;            _imageView = nil;        }];    }}@end

IOS開發—IOS自訂任意位置右滑POP視圖控制器