Question

我有一个带有3个按钮的视图，当用户点击第一个按钮时，它会转到seconViewController 使用此代码。

PerformViewController * pvc=[[PerformViewController alloc]initWithNibName:@"PerformViewController" bundle:nil];

[self presentViewController:pvc animated:YES completion:nil];
[self dismissViewControllerAnimated:YES completion:nil];

和我使用[self.navigationController pushViewController:gmavc animated:YES];的另外两个按钮它工作正常但是当点击第一个按钮使用时点击呈现第二个ViewController。并回到它的viw控制器我使用此代码

ViewController *vc=[[ViewController alloc]initWithNibName:@"ViewController" bundle:nil];

[self presentViewController:vc animated:YES completion:nil];

[self dismissViewControllerAnimated:YES completion:nil];

回到parant视图控制器之后，我的另外两个按钮推动导航控制器无法工作，而不是为什么会发生这种情况。

Answer 1

在YourAppDelegate中定义@property (strong, nonatomic) UINavigationController *navigationCntr;

使用以下代码呈现控制器

YourAppDelegate *del = (YourAppDelegate *)[[UIApplication sharedApplication] delegate];

YourViewController *viewCntrl = [[YourViewController alloc] initWithNibName:@"YourViewController" bundle:[NSBundle mainBundle]];

UINavigationController *navContrl = [[UINavigationController alloc] initWithRootViewController:viewCntrl];
navContrl.navigationBarHidden = YES;

[del.navigationCntr presentModalViewController:navContrl animated:YES];

解雇

YourAppDelegate *delegate = (YourAppDelegate *)[[UIApplication sharedApplication] delegate];
[delegate.navigationCntr dismissModalViewControllerAnimated:YES];

Answer 2

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];

    MainViewController *mainView = [[MainViewController alloc]initWithNibName:@"MainViewController" bundle:nil];

    UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:mainView];
    self.window.rootViewController = nav;
    return YES;
}

Answer 3

@interface MainViewController : UIViewController
{

}
- (IBAction)presentClicked:(id)sender;

- (IBAction)nevigateClicked:(id)sender;

@end



#import "MainViewController.h"
#import "PresViewController.h"
#import "NavViewController.h"

@interface MainViewController ()

@end

@implementation MainViewController

- (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.
}

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

- (IBAction)presentClicked:(id)sender {

    PresViewController *preView = [[PresViewController alloc]initWithNibName:@"PresViewController" bundle:nil];
    [self presentModalViewController:preView animated:YES];
}

- (IBAction)nevigateClicked:(id)sender {

    NavViewController *navView = [[NavViewController alloc]initWithNibName:@"NavViewController" bundle:nil];
    [self.navigationController pushViewController:navView animated:YES];
}
@end

Answer 4

#import <UIKit/UIKit.h>

@interface PresViewController : UIViewController
{

}
- (IBAction)hideClicked:(id)sender;


@end



#import "PresViewController.h"

@interface PresViewController ()

@end

@implementation PresViewController

- (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.
}

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

- (IBAction)hideClicked:(id)sender {

    [self dismissViewControllerAnimated:YES completion:nil];
}
@end

Answer 5

#import <UIKit/UIKit.h>

@interface NavViewController : UIViewController

@end


#import "NavViewController.h"

@interface NavViewController ()

@end

@implementation NavViewController

- (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.
}

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

@end

使用Present模型控制器后导航控制器无法工作

5 个答案: