iOS滑动全屏实现返回功能

本文实例为大家分享了iOS滑动全屏实现返回功能的具体代码，供大家参考，具体内容如下

系统自带的滑动返回功能，只能滑动边缘返回，而我们希望通过滑动全屏实现返回功能。

定义BaseNavigationController来取代UINavigationController

// BaseNavigationController.h
#import <UIKit/UIKit.h>

@interface BaseNavigationController : UINavigationController

@end

// BaseNavigationController.m
#import "BaseNavigationController.h"

@interface BaseNavigationController () <UIGestureRecognizerDelegate>

@end

@implementation BaseNavigationController

#pragma mark - 系统方法
+ (void)load
{
UINavigationBar *navBar = [UINavigationBar appearanceWhenContainedIn:self, nil];

// 只要是通过模型设置，都是通过富文本设置
// 设置导航条标题 => UINavigationBar
NSMutableDictionary *attrs = [NSMutableDictionary dictionary];
attrs[NSFontAttributeName] = [UIFont boldSystemFontOfSize:20.0];
[navBar setTitleTextAttributes:attrs];

// 设置导航条背景图片
[navBar setBackgroundImage:[UIImage imageNamed:@"navigationbarBackgroundWhite"] forBarMetrics:UIBarMetricsDefault];
}

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.

// 自己控制返回手势
// self.interactivePopGestureRecognizer.delegate = self;
// NSLog(@"self.interactivePopGestureRecognizer : %@",self.interactivePopGestureRecognizer);
// NSLog(@"self.interactivePopGestureRecognizer.delegate : %@",self.interactivePopGestureRecognizer.delegate);

// 全屏返回手势，而不是边缘返回手势
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self.interactivePopGestureRecognizer.delegate action:@selector(handleNavigationTransition:)];
[self.view addGestureRecognizer:pan];
// 控制手势什么时候触发，只有非根控制器才需要出发手势
pan.delegate = self;
// 禁止之前手势
self.interactivePopGestureRecognizer.enabled = NO;
}

/**
* self.interactivePopGestureRecognizer : <UIScreenEdgePanGestureRecognizer: 0x7fb57dc23510; state = Possible; delaysTouchesBegan = YES; view = <UILayoutContainerView 0x7fb57dc220e0>; target= <(action=handleNavigationTransition:, target=<_UINavigationInteractiveTransition 0x7fb57dc1c570>)>>
* self.interactivePopGestureRecognizer.delegate : <_UINavigationInteractiveTransition: 0x7fb57dc1c570>
*/

#pragma mark - UIGestureRecognizerDelegate
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
// 当不是根控制器时才会触发返回手势
return (self.childViewControllers.count > 1);
}

#pragma mark - 重写
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
if (self.childViewControllers.count > 0) { // 代表不是根控制器

// 自定义返回按钮覆盖了系统的返回手势
viewController.navigationItem.leftBarButtonItem = [UIBarButtonItem setBackButtonItemWithImage:[UIImage imageNamed:@"navigationButtonReturn"] highlightedImage:[UIImage imageNamed:@"navigationButtonReturnClick"] target:self action:@selector(backClick) title:@"返回"];
}

[super pushViewController:viewController animated:animated];
}

- (void)backClick
{
[self popViewControllerAnimated:YES];
}

@end

UIBarButtonItem+item

// UIBarButtonItem+item.h
#import <UIKit/UIKit.h>

@interface UIBarButtonItem (item)

+ (UIBarButtonItem *)setBarButtonItemWithImage:(UIImage *)image highlightedImage:(UIImage *)highlightedImage target:(id)target action:(SEL)action;

+ (UIBarButtonItem *)setBarButtonItemWithImage:(UIImage *)image selectedImage:(UIImage *)selectedImage target:(id)target action:(SEL)action;

+ (UIBarButtonItem *)setBackButtonItemWithImage:(UIImage *)image highlightedImage:(UIImage *)highlightedImage target:(id)target action:(SEL)action title:(NSString *)title;

@end

// UIBarButtonItem+item.m
#import "UIBarButtonItem+item.h"

@implementation UIBarButtonItem (item)

+ (UIBarButtonItem *)setBarButtonItemWithImage:(UIImage *)image highlightedImage:(UIImage *)highlightedImage target:(id)target action:(SEL)action
{
// 1.leftBarButtonItem
UIButton *leftButton = [UIButton buttonWithType:UIButtonTypeCustom];
[leftButton setImage:image forState:UIControlStateNormal];
[leftButton setImage:highlightedImage forState:UIControlStateHighlighted];
[leftButton sizeToFit];

// 按钮点击事件
[leftButton addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];

// 由于使用button会使得点击范围增大，所以将button放进view中，然后赋值
UIView *leftView = [[UIView alloc] initWithFrame:leftButton.bounds];
[leftView addSubview:leftButton];
return [[UIBarButtonItem alloc] initWithCustomView:leftView];
}

+ (UIBarButtonItem *)setBackButtonItemWithImage:(UIImage *)image highlightedImage:(UIImage *)highlightedImage target:(id)target action:(SEL)action title:(NSString *)title
{
// 设置返回按钮
UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
[backButton setTitle:title forState:UIControlStateNormal];
[backButton setImage:image forState:UIControlStateNormal];
[backButton setImage:highlightedImage forState:UIControlStateHighlighted];
[backButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[backButton setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
[backButton addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
backButton.contentEdgeInsets = UIEdgeInsetsMake(0, -15, 0, 0);
[backButton sizeToFit];

return [[UIBarButtonItem alloc] initWithCustomView:backButton];
}

+ (UIBarButtonItem *)setBarButtonItemWithImage:(UIImage *)image selectedImage:(UIImage *)selectedImage target:(id)target action:(SEL)action
{
// 1.leftBarButtonItem
UIButton *leftButton = [UIButton buttonWithType:UIButtonTypeCustom];
[leftButton setImage:image forState:UIControlStateNormal];
[leftButton setImage:selectedImage forState:UIControlStateSelected];
[leftButton sizeToFit];

// 按钮点击事件
[leftButton addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];

// 由于使用button会使得点击范围增大，所以将button放进view中，然后赋值
UIView *leftView = [[UIView alloc] initWithFrame:leftButton.bounds];
[leftView addSubview:leftButton];
return [[UIBarButtonItem alloc] initWithCustomView:leftView];
}

@end

以上就是本文的全部内容，希望对大家的学习有所帮助

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