随笔 - iOS 自定义 NavigationController

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自定义导航栏，支持手势

#import "JINavigationController.h"

@interface JINavigationController ()<UINavigationControllerDelegate,UIGestureRecognizerDelegate>

@end

@implementation JINavigationController

+ (void)initialize {
    //appearance方法返回一个导航栏的外观对象
    //修改了这个外观对象，相当于修改了整个项目中的外观
    UINavigationBar *navigationBar = [UINavigationBar appearance];
    //设置导航栏背景颜色
    [navigationBar setBarTintColor:[UIColor whiteColor]];
    //设置标题栏颜色
    navigationBar.titleTextAttributes = @{NSForegroundColorAttributeName:[UIColor blackColor], NSFontAttributeName : [UIFont systemFontOfSize:18]};
    //设置NavigationBarItem文字的颜色
    //[navigationBar setTintColor:[UIColor blackColor]];
}

- (void)viewDidLoad {
    [super viewDidLoad];
    __weak typeof(self) wkself = self;
    self.delegate = wkself;
}

///MARK: override
//全部修改返回按钮,但是会失去右滑返回的手势
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    if (self.viewControllers.count > 0) {
        viewController.hidesBottomBarWhenPushed = YES;
        viewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"btn_back_black"] style:UIBarButtonItemStyleDone target:self action:@selector(backClickedAction)];
    }
    //在push一个新的VC时，禁用滑动返回手势
    if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.interactivePopGestureRecognizer.enabled = NO;
    }
    [super pushViewController:viewController animated:animated];
}

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

///MARK: UINavigationControllerDelegate
- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated{
    //完全展示出VC时，启用滑动返回手势
    if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.interactivePopGestureRecognizer.delegate = self;
        self.interactivePopGestureRecognizer.enabled = YES;
    }
    //解决根试图左滑页面卡死
    if (navigationController.viewControllers.count == 1) {
        navigationController.interactivePopGestureRecognizer.enabled = NO;
        navigationController.interactivePopGestureRecognizer.delegate = nil;
    }
}

///MARK: UIGestureRecognizerDelegate
//接受多手势
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
    return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldBeRequiredToFailByGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
    return [gestureRecognizer isKindOfClass:UIScreenEdgePanGestureRecognizer.class];
}

@end