Question

我在方法中设置了- (void)setViewControllers:(NSArray *)viewControllers direction:(UIPageViewControllerNavigationDirection)direction animated:(BOOL)animated completion:(void (^)(BOOL finished))completion。每当调用该方法时，它都不会转到下一页。相反，它转到UIPageViewController故事板然后崩溃。我不确定我做错了什么。我正在使用MSPageViewController作为pageviewcontroller，可能就是这样吗？

继承我的代码：

UIViewController *viewcont = [[UIViewController alloc]init];

NSArray *viewControllers = [NSArray arrayWithObject:viewcont];

[self setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:nil];

感谢。

有3个故事板都符合MSPageViewControllerChild并合成了pageIndex属性。 IntroPageViewController是第一个故事板（p1）。

PagingViewController.h：

    //
//  PagingViewController.m
//  MordechaiLevi
//
//  Created by Mordechai Levi on 4/10/14.
//  Copyright (c) 2014 Mordechai Levi. All rights reserved.
//

#import "PagingViewController.h"
#import "IntroPageViewController.h"
#import "MSPageViewController.h"

@interface PagingViewController ()

@end

@implementation PagingViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.device = [UIDevice currentDevice];

    self.device.proximityMonitoringEnabled = YES;

    if (self.device.proximityMonitoringEnabled == YES) {

        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sensorCovered) name:@"UIDeviceProximityStateDidChangeNotification" object:nil];

    }else{

        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Uh Oh!" message:@"To use this app you need a device with a proximity sensor." delegate:self cancelButtonTitle:@"Got it" otherButtonTitles:nil, nil];

        [alert show];
    }

    self.view.backgroundColor = [UIColor colorWithRed:0.2 green:0.859 blue:0.643 alpha:1.0];

}


- (UIStatusBarStyle)preferredStatusBarStyle {

    return UIStatusBarStyleLightContent;
}

- (void)sensorCovered {

    if (self.device.proximityState == YES) {

        IntroPageViewController *viewcont = [[IntroPageViewController alloc]init];

        NSArray *viewControllers = [NSArray arrayWithObject:viewcont];

        [self setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:nil];


        NSLog(@"sensor covered");

    }else{

        NSLog(@"sensor not covered");
    }
}




- (NSArray *)pageIdentifiers {

    return @[@"p1", @"p2", @"p3"];
}


@end

Answer 1

您似乎正在使用MSPageViewController，控制器不符合MSPageViewControllerChild。

来自文档：

每个[控制器]必须是符合MSPageViewControllerChild的类（如果你不需要为它添加任何额外的功能，你可以使用MSPageViewControllerPage。）

UIPageViewController setViewController导致应用程序崩溃

1 个答案: