Objective c 没有可见的@interface for x声明选择器initwithnib:bundle

错误发生在以下位置：

#import "levelSelectorController.h"
#import "ViewController.h"
ViewController *viewController;

@interface levelSelectorController ()

@end

@implementation levelSelectorController

- (void)viewDidLoad
{
     [super viewDidLoad];
     // Do any additional setup after loading the view, typically from a nib.
    if ([self respondsToSelector:@selector(setNeedsStatusBarAppearanceUpdate)]) {
        // iOS 7
        [self performSelector:@selector(setNeedsStatusBarAppearanceUpdate)];
    } else {
        // iOS 6
        [[UIApplication sharedApplication] setStatusBarHidden:YES     withAnimation:UIStatusBarAnimationSlide];
    }
    viewController = [[ViewController alloc] initWithNib:@"ViewController" bundle:nil];
}

@end

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我尝试了一些我在stackoverflow上读到的不同的东西，我理解错误的含义。但我还是无法解决这个问题

您使用了错误的选择器。它是：

viewController = [[ViewController alloc] initWithNib:@"ViewController" bundle:nil];

---

您使用了错误的选择器。它是：

viewController = [[ViewController alloc] initWithNib:@"ViewController" bundle:nil];

---

代码是

initWithNibName

@Fogmeister我不明白你想告诉我什么。代码是

initWithNibName

@Fogmeister我不明白你想告诉我什么。