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【iOS 7】使用UIScreenEdgePanGestureRecognizer实现swipe to pop效果
在iOS 7还没有发布的时候，各种App实现各种的swipe to pop效果，比如。
在iOS 7上，只要是符合系统的导航结构：[即根视图由导航控制器控制]
// Created by wangyuanyuan on 14-9-15.// Copyright (c) 2014年 ___FULLUSERNAME___. All rights reserved.//#import "AppDelegate.h"#import "FirstViewController.h"#import "SecondViewController.h"@implementation AppDelegate- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{ self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; // Override point for customization after application launch. self.window.backgroundColor = [UIColor whiteColor]; FirstViewController * firstVC = [[FirstViewController alloc]init]; SecondViewController * secondVC = [[SecondViewController alloc]init]; NSArray * arr = [NSArray arrayWithObjects:firstVC,secondVC, nil]; UITabBarController * tabVC = [[UITabBarController alloc]init]; tabVC.viewControllers = arr; UINavigationController * mainVC = [[UINavigationController alloc]initWithRootViewController:tabVC]; self.window.rootViewController = mainVC; [self.window makeKeyAndVisible]; return YES;}就能够有原来漂亮的效果：
遗憾的是目前项目代码里没有遵循iOS系统的导航结构，使得无法利用这点好处。所以我考虑使用新增的UIScreenEdgePanGestureRecognizer手势：
1 - (void)viewWillAppear:(BOOL)animated 2 { 3 if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")) { 4 UIScreenEdgePanGestureRecognizer *left2rightSwipe = [[UIScreenEdgePanGestureRecognizer alloc] 5 initWithTarget:self 6 action:@selector(handleSwipeGesture:)]; 7 [left2rightSwipe setDelegate:self]; 8 [left2rightSwipe setEdges:UIRectEdgeLeft]; 9 [self.view addGestureRecognizer:left2rightSwipe];10 }11 12 }13 14 15 - (void)handleSwipeGesture:(UIScreenEdgePanGestureRecognizer *)gestureRecognizer16 {17 [self.navigationController popViewControllerAnimated:YES];18 }
这也实现了相关的返回功能的效果，具体还有相关的手势相关的干扰问题，详情请见博客：http://blog.csdn.net/jasonblog/article/details/16867587
【iOS 7】使用UIScreenEdgePanGestureRecognizer实现swipe to pop效果
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