Im making a framework and I want to go back to a view controller that the publisher sets. Im using this code:
BV_APIViewControllerler *newView = [[BV_APIViewController alloc] initWithNibName:nil bundle:nil];
newView.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self presentModalViewController:newView animated:YES];
[newView release];
But I want to switch to a view controller they save to NSUserDefaults
What's the problem ? Juste read the name of the nib name stored in the defaults, and use it. The XIB file must reference BV_APIViewController as file's owner.
Related
I've implemented two uiviewcontrollers. I have some text fields in one on a uiview and 1 button on it. What I want is that when I fill text fields and click on the button, these values show on another uiview controller. I am facing a problem when I fill the text fields and click on the button, another uiview on shows on the iPhone screen but the text field values are not shown on it. I also import nextview.h file in my viewcontroller.m file. Below is some of my code:
-(IBAction)save:(id)sender
{
nextview *NView = [[nextview alloc] initWithNibName:nil bundle:nil];
[[NView name] setText:name.text];
[[NView fathername] setText:father.text];
[[NView country] setText:countryselected.text];
[[NView gender] setText:genderselected.text];
[[NView dob] setText:dateselected.text];
[[NView username] setText:username.text];
[[NView password] setText:password.text];
[[NView email] setText:email.text];
[self presentModalViewController:NView animated:YES];
}
In the nextview class, I also define #property of uilabels in the .h file and I also #synthesize, initialize and release these labels in the nextview.m file and linked these variables to all labels. The problem is still there. What can I do to avoid this problem?
See this line of code:
nextview *NView = [[nextview alloc] initWithNibName:nil bundle:nil];
You use a nil as nib name to create your next view. Have you overwritten initWithNibName of the nextview to give a nib name?
do you init you property your member(such as name) when call
nextview *NView = [[nextview alloc] initWithNibName:nil bundle:nil]; if you init them in viewdidiload or other function about view，then they will be initialized after
you call [self presentModalViewController:NView animated:YES];
There i so many method through which you can pass data from one view to another. in this Tutorial there is brief discription about this method Which you Want Check it Tutorial Source Code
See apples documentation for initWithNibName
http://developer.apple.com/library/ios/ipad/#documentation/uikit/reference/UIViewController_Class/Reference/Reference.html
The nib is not loaded until its view is accessed. For additional initialisation use viewDidLoad.
Meaning, the outlets are just not set directly after initWithNibName.
So, one of the things you could do is add a reference to the first viewController as a property in nView and in viewDidLoad of nView you set the labels according to the first VCs labels.
On a side note: your naming convention is wrong. Use Uppercase for classes and lowercase for instances of that class ie it should be
Nextview *nView;
I have built a program without a menu. The main view has custom buttons which loads XIBs depending on which button is pressed. The only issue i'm having is when I go back to an already used view, its reset. I have tried "retain" in viewDidUnload and in viewWillUnload. I have tried everything I can thin of and cant get it to work.
- (IBAction)gotoMusicView:(id)sender{
//[self.view addSubview:musicview];
if(self.musicMenuData == nil)
{
musicMenu *musicview = [[musicMenu alloc]initWithNibName:#"musicMenu" bundle:[NSBundle mainBundle]];
self.musicMenuData = musicview;
musicview.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:musicview animated:YES];
[musicview release];
}
musicMenu *musicview = [[musicMenu alloc] initWithNibName:nil bundle:nil];
musicview.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:musicview animated:YES];
}
That musicview loads fine. After I leave that view and go back to the main view, it is RELEASED. Therefore when I reopen "musicview" everything , such as my UIWebView, has reset as if I am opening it again for the 1st time
Create a singleton class using this
And then initialize your .xibs there so you can use the same instance everytime you load the .xib. This way it'll never reset
Instead of allocating and initializing each time you need to use it, keep a reference of all the view controllers you're using, check of its nil on the first time if so initialize, example below.
if(self.someViewController == nil)
self.someViewController = [[ViewController alloc] initWithNibName:#"ViewController"....
//Now present self.someViewController..
Do this for the view controllers that you use for the tabs.
I have an iPad app that uses the storyboard board feature and then I have a separate .xib file for another view. I can switch to the separate view and its fine:
-(IBAction)SecondView:(id)sender{
SecondView *Second = [[SecondView alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:Second animated:NO];
}
But when I am in the Second View and try going back I do everything the same just with the first view controller, but It just goes to a black screen:
-(IBAction)FirstView:(id)sender{
FirstView *First = [[FirstView alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:First animated:NO];
}
What do you guys think? Am I doing something wrong? What is the best way to switch views?
initWithNibName:bundle is for loading nib or xib files.
If you are loading from a storyboard, you need to use
FirstView *First= [self.storyboard instantiateViewControllerWithIdentifier:#"IDENTIFIER"];
IDENTIFIER is defined in your storyboard, it's in the Utilities, Attributes Inspector on the right side.
HOWEVER your real problem is that you shouldn't be loading from the storyboard at all. you should just be calling
[self dismissModalViewControllerAnimated:YES];
That call will clean up the presentModalViewController:animated: that you used to put the modal view controller up in the first place.
You presented SecondView using presentModalViewController:animated:, so you need to dismiss it using dismissModalViewControllerAnimated:.
- (IBAction)FirstView:(id)sender
{
[self dismissModalViewControllerAnimated:YES];
}
I have the following Objective-C code:
MainMenu *main= [[MainMenu alloc] initWithNibName:nil bundle:nil];
[[self navigationController]pushViewController:main animated:YES];
NSLog(#"hello");
I have a class called 'MainMenu' with a corresponding header file and xib file. No matter what I do, it simply won't show. I have confirmed that the code gets to the above, because of the NSLog('hello').
I've been pulling my hair out for hours now and I simply cannot get to the bottom of it.
I hope someone can help,
Edit - still having problems...
Here are some screenshots of my project setup:
Ok, so I tried this:
MainMenu *main= [[MainMenu alloc] initWithNibName:nil bundle:nil];
[[self navigationController]pushViewController:main animated:YES];
[self.view addSubview:main.view];
But it still doesn't work...
Many thanks in advance,
The fact that initWithNibName is nil should not be the problem because if it is given nil it looks for a nib with the exact name of the class.
Two things:
1) Make sure you have run a clean recently and make sure that file is correctly being loaded.
2) Make sure navigationController is not nil, if it is then you need to make sure you make a navigation controller if you are not intending on using a navigation controller, consider using:
- (void)presentModalViewController:(UIViewController *)modalViewController
animated:(BOOL)animated
Why are you setting the nibName to nil? If the name of the nib is MainMenu, then you want:
MainMenu *main= [[MainMenu alloc] initWithNibName:#"MainMenu" bundle:nil];
[self.navigationController pushViewController:main animated:YES];
[main release];
Are you sure that you have a UINavigationController in order to push a new view?
Hope that Helps!
Dont pull your hair just look at your code closely: You have nil in your initWithNibName. Whats MainMenu is it a viewController or what ? and place your correct nib for your to get Hello.
Updated as asked :
MainMenu *main= (MainMenu *)[MainMenu alloc] init];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:main];
[self.navigationController presentModalViewController:nav animated:YES];
NSLog(#"hello");
I guess the issue is that you do not have a navigation controller set up .Try to present the view controller by
[self presentModalViewController:main animated:YES];
Verify that the object owner is in fact MainMenu and the view is connected.
In the MainMenu NIB, select File's Owner and the click on the Identity Inspector. Class should match your VC class name.
Then select the main View in your NIB and click on the Connections Inspector. The view outlet should be connected to your File's Owner.
If those are both set correctly, then post some more surrounding code. Notable point, if those are both set,
MainMenu * main= [[MainMenu alloc] initWithNibName:nil bundle:nil];
[self.navigationController pushViewController:main animated:YES];
will load the correct NIB and display it.
What are you seeing? Another point if MainMenu is a subclass of some other VC with a NIB you will have to change the base class' init to override the default behavior, for example:
self = [super initWithNibName:nibNameOrNil == nil ? #"BaseViewController" : nibNameOrNil bundle:nibBundleOrNil]
But in that case you would have to specific the NIB that will override the base view controller's.
Post more code and let us know what you are seeing when you run.
I am creating a Navigation based iPhone application.
In that I have called a UiViewController using presentModalViewController. After that, the ViewController becomes visible. From that ViewController I need to call another ViewController using the sample presentModalViewController. Is this possible or not?
What do you mean by "call another uiviewcontroller"? (It really helps if you can be more detailed in your question.) If you mean, "slide in another view controller", then:
MyNewViewController *myNewViewController = [[MyNewViewController alloc] initWithNibName:#"MyNewViewController" bundle:nil];
[navigationController pushViewController:myNewViewController animated:YES];
[myNewViewController release];
...where:
MyNewViewController is the new view controller class that you want to slide in (the above code assumes you have an XIB file for the view controller class).
navigationController points to the current navigation controller. You'll have to replace it with something like [self navigationController], depending where you are in the view hierarchy.
U might be using following line to present a view controller.
//assume name of viewController which u want to present is "myViewController"
[self.navigationController presentModalViewController:myViewController animated:YES]
If you want to push an other ViewController or present an other ViewController then u will need to replace above line with following lines.
//[self.navigationController presentModalViewController:myViewController animated:YES];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:myViewController];
navigationController.navigationBarHidden = YES; //if u want to show navigation bar then remove this line
[self presentModalViewController:navigationController animated:YES];
After using above code you can present or push other view controllers within presented view controller.
Hope it will solve your problem :)