iOS 记录navigationController的全屏滑动

2017-01-14 15:50:18来源:http://www.jianshu.com/p/e14778b24a4f作者:irmbeu人点击

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看到@J_雨大牛的博客,讲的很细致,在此记录下第二种方法,以备以后使用,原文链接:http://www.jianshu.com/p/d39f7d22db6c


#import "Nav.h"
@interface Nav ()<UIGestureRecognizerDelegate>
@end
@implementation Nav
- (void)viewDidLoad {
[super viewDidLoad];
//拿到navigationController原有的pop手势
UIGestureRecognizer *gesture = self.interactivePopGestureRecognizer;
//将自有手势停用
gesture.enabled = NO;
//拿到手势的view
UIView *gestureView = gesture.view;
//创建一个自己的手势
UIPanGestureRecognizer *popRecognizer = [[UIPanGestureRecognizer alloc] init];
popRecognizer.delegate = self;
popRecognizer.maximumNumberOfTouches = 1;
//将自己创建的手势放到原有手势的view上
[gestureView addGestureRecognizer:popRecognizer];
//获取系统的手势的target数组
NSMutableArray *_targets = [gesture valueForKey:@"_targets"];
//获取它的唯一对象 有一个叫UIGestureRecognizerTarget的私有类,有一个属性叫_target
id gestureRecognizerTarget = [_targets firstObject];
//获取_target:_UINavigationInteractiveTransition 有一个方法叫handleNavigationTranstion
id navigationInteractiveTransition = [gestureRecognizerTarget valueForKey:@"_target"];
//从控制台获取出他的方法签名
SEL handelTransition = NSSelectorFromString(@"handleNavigationTransition:");
//创建一个与系统一毛一样的手势 我们只把他的类改为UIPanGestureRecognizer
[popRecognizer addTarget:navigationInteractiveTransition action:handelTransition];
}
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
//这里有两个条件不允许手势 1 当前控制器为根控制器 2 如果这个push pop 动画正在执行(私有属性)
return self.viewControllers.count != 1 && ![[self valueForKey:@"_isTransitioning"] boolValue];
}

使用时


#import "AppDelegate.h"
#import "Nav.h"
#import "ViewController.h"
@interface AppDelegate ()
@end
@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
self.window.backgroundColor = [UIColor whiteColor];
ViewController *vc = [[ViewController alloc] init];
Nav *nav = [[Nav alloc] initWithRootViewController:vc];
self.window.rootViewController = nav;
[self.window makeKeyAndVisible];
return YES;
}



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