Question

I am trying to load a new view when I click a button in the app. The error I am getting is -

View Switcher[6867:207] -[UIView pushViewController:animated:]: unrecognized selector sent to instance 0x6010660

and the source code snippet is -

-(IBAction) blueButtonPressed:(id)sender{

if(self.yellowViewController == nil){
    YellowViewController *yellowController = [[YellowViewController alloc] initWithNibName:@"YellowView" bundle:nil];
    self.yellowViewController = yellowController;
    //[yellowController release];

    //[self.view addSubview:yellowController.view];
//[self.view pushViewController:self.yellowViewController];
    [self.navigationController pushViewController:self.yellowViewController];
[yellowController release];
}
//[self.navigationController pushViewController:self.yellowViewController animated:YES];
}

我使用的是头号档案——

#import <UIKit/UIKit.h>

@class BlueViewController;
@class YellowViewController;


@interface BlueViewController : UIViewController {  
YellowViewController *yellowViewController;
BlueViewController *blueViewController; 
}
-(IBAction)blueButtonPressed:(id)sender;

@property(retain) YellowViewController *yellowViewController;
@property(retain, nonatomic) BlueViewController *blueViewController;
@end

与Xcode项目的联系是:

Answer 1

pushViewController is a UINavigationController method.

[self.navigationController pushViewController:self.yellowViewController animated:YES];

I m assuming you are in a UIViewController subclass

您能否担任Xcode项目一,需要看到这一点。

Ok, I ve look into your code, the problem is that you don t have any navigationController. Your app is structured like a view base application not like a navigation base application.
The result is that your self.navigationController == nil, that is why that call is ignored.

在您的申请书中,您需要一些照样的法典。

UINavigationController *navCon = [[UINavigationController alloc] initWithRootViewController:switchViewController];
navCon.navigationBarHidden = YES;
self.window.rootViewController = navCon;
[window makeKeyAndVisible];

申请表......

In your code, when you click on your switch in the toolbar, it s "working" because your using this code :

[blueViewController.view removeFromSuperview];
[self.view insertSubview:yellowViewController.view atIndex:0];

没有航行在这一进程中,主计长。

Answer 2

You should use [self.view addSubview:yellowController.view];

最好有导航控制器,由您推向或从中抽出乘客。

Answer 3

UIView does not have pushViewController:animated: as a method.

You can push only in UINavigationController

友情链接