Question

在尝试从模态视图转到普通视图控制器（ PBSViewControllerDataDetail.h ）时调试我的应用程序时出现断言失败错误（不是原始视图控制器提供的模态视图）

基本上我要做的是：

ViewController1，打开模态视图并执行异步请求。当它返回时，然后将用户发送到第二个普通视图控制器，该控制器将向用户显示在模态视图中获得的数据。

其他一切都有效，直到模态尝试呈现第二个视图控制器。我得到了错误（第一行是我的NSLog输出，来自试图呈现第二个VC的方法）

2013-09-22 07:24:11.410 PBSDashboard[566:1303] flipToDataView->Send user to PBSViewControllerDataDetail
2013-09-22 07:24:11.411 PBSDashboard[566:1303] *** Assertion failure in -[UIWindowController transition:fromViewController:toViewController:target:didEndSelector:], /SourceCache/UIKit_Sim/UIKit-2380.17/UIWindowController.m:211

请注意：我不在此项目中使用NavigationViewController并考虑重新启动整个批次并使用一个，但目前我只是想了解如何从Modal转到普通的ViewController那不是原来的。

我尝试过清理目标，从头开始重新创建第二个VC，但都没有成功。

代码段

PBSRequestViewController.h

#import <UIKit/UIKit.h>
#import "Unirest.h"
#import "PBSDaySales.h"

@class PBSRequestViewController;

@protocol PBSRequestViewControllerDelegate
    - (void) requestViewControllerDidFinish:(PBSRequestViewController *)controller;
@end

@interface PBSRequestViewController : UIViewController

@property (weak, nonatomic) IBOutlet id <PBSRequestViewControllerDelegate> delegate;
@property (weak, nonatomic) IBOutlet NSString *calendType;
@property (weak, nonatomic) IBOutlet NSString *targetDate;
@property (weak, nonatomic) IBOutlet UILabel *messageLabel;


- (void) runUnirestRequest:(NSString*)urlToGet;
- (void) loadDefaultSettings;
- (NSString*) buildRequestUrl:(NSString*)serverUrl withPort:(NSString*)serverPort withCalenderType:(NSString*)calendarType withDateStringParameter:(NSString*)selectedTargetDate;

- (IBAction)btnBack:(id)sender;

- (PBSDaySales*) deserializeJsonPacket:(NSDictionary*)httpJson;
- (void)createActivityIndicator;
- (void)flipToDataView;

@end

PBSRequestViewController.m （只是第二个vc的调用函数）

// Method will forward the user on to the data view.
// Used after the uniRestRequest is completed and data exists.
- (void) flipToDataView
{
    NSLog(@"flipToDataView->Send user to PBSViewControllerDataDetail");
    PBSViewControllerDataDetail *dataVc = [[PBSViewControllerDataDetail alloc] initWithNibName:@"PBSViewControllerDataDetail" bundle:nil];

    dataVc.daySalesData = daySalesFigures;

    [self presentViewController:dataVc animated:YES completion: nil];
}

PBSViewControllerDataDetail.h

#import <UIKit/UIKit.h>
#import "PBSDaySales.h"

@interface PBSViewControllerDataDetail : UIViewController
    @property (weak, nonatomic) PBSDaySales *daySalesData;
@end

PBSViewControllerDataDetail.m

#import "PBSViewControllerDataDetail.h"

@interface PBSViewControllerDataDetail ()

@end

@implementation PBSViewControllerDataDetail

@synthesize daySalesData;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    NSLog(@"View loaded");
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

PBSAppDelegate.m

#import "PBSAppDelegate.h"

#import "PBSViewController.h"

@implementation PBSAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
        self.viewController = [[PBSViewController alloc] initWithNibName:@"PBSViewController_iPhone" bundle:nil];
    } else {
        self.viewController = [[PBSViewController alloc] initWithNibName:@"PBSViewController_iPad" bundle:nil];
    }
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    return YES;
}

Answer 1

要从模态转换为“正常”，您应该在模态控制器后面（通常在根导航控制器中）呈现“正常”控制器，然后解除模态。将导航控制器作为窗口的根视图控制器可以使生活更轻松，因为它可以是模态的主机。在任何时候你都不应该尝试使用从模态到“正常”的过渡，它始终是对模态的忽略。如果有意义的话，模态在屏幕层中的概念上是不同的级别......

从模态视图提出viewcontroller给出错误

1 个答案: