I have a Storyboarded app and need to switch between views. E.g. when a calculation is complete I want to load up a new view and display the answers...
So what I an trying to do is:
IBAction (Button pressed to calculate answer) {
Do the Maths
Jump to Results View
}
I have read several ways of doing this but none seem to work.
I am trying approaches like:
SRViewController *second = [[SRViewController alloc] initWithNibName:#"SRViewController" bundle:nil];
[self.navigationController pushViewController:second animated:YES];
What do I need to do?
use - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender method to complete your required work
for more see this
Related
I'm using MWPhotoBrowser in a project and everything worked great until I implemented a custom tabbar (to make one of the tab items higher and wider). I used RXCustomTabBar as a starting point for my tabbar and only modified it a bit, no meaningful changes though.
After implementing the new tabbar and in the app open the MWPhotoBrowser I can only view the first photo. I can still scroll in the photobrowser but no other photos than the first is shown. Neither can I toggle the "fullScreenLayout" that is implemented in the MWPhotobrowser when I'm not viewing the first photo.
I'm simply confused since I have no idea what is causing this problem. I know it's a far fetched question since it's two custom made libraries I'm working with but perhaps someone has experienced a similar problem in the past. Would be very grateful for suggestions!
This is the code I use to push the MWPhotoBrowser:
MWPhotoBrowser *browser = [[MWPhotoBrowser alloc] initWithDelegate:self];
[self.navigationController pushViewController:browser animated:YES];
I tried presenting the browser modally with:
[self.navigationController presentModalViewController:browser animated:YES];
That way the photos are shown correctly but I have no navigation bar.
After hours of headache I came up with a solution:
MWPhotoBrowser *browser = [[MWPhotoBrowser alloc] initWithDelegate:self];
[browser setInitialPageIndex:indexPath.item];
UINavigationController *navBar = [[UINavigationController alloc] initWithRootViewController:browser];
[self.navigationController presentModalViewController:navBar animated:YES];
I.e. I create a UINavigationController in which I embed my MWPhotoBrowser and then present the navigationcontroller modally.
I've got 5 views in my tabBarController and all of them are embedded in a separate navigationcontroller, i.e. every view has it's own navigationcontroller. I did this to make it easier to push segues, I know it's probably not the best solution but it works fine. Now to my question:
I'm trying to set the initial view with the following code:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
tabBarController.selectedIndex = 2;
return YES;
}
However it's not working at all, the app simply starts and index 0 (the left most view).
I've searched through thorough threads like this and tried many different ways to solve this without any success...
Closest I got was when I in MainStoryboard_iPhone.storyboard checked the box "Is initial view controller" in the viewcontroller I want to start with. This way the I got the correct starting viewcontroller but the tabbar wasn't showing.
Since you're using storyboard, do this :
1) Give your tabBarController a storyboard identifier (say tbc);
2) In your appDelegate DidFinishLaunching, do this ::
UITabBarController *tbc = [[UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil] instantiateViewControllerWithIdentifier:#"tbc"];
[tbc setSelectedIndex:1];
[self.window setRootViewController:tbc];
[self.window makeKeyAndVisible];
return YES;
PS : This is just one of many ways to make it work
I've got a small project with two UIImageView-based nib files.
When the main view loads, it looks correct.
To switch between views, I'm using code like this (for example, this is to go to second view)
-(IBAction) secondClicked:(id)sender {
SecondViewController *second = [[SecondViewController alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:main animated:NO];
[second release];
}
When the new view is shown, it's shifted sideways about 10% of screen. Using similar code to go back to main results in the main view being shown similarly offset.
I'm in landscape mode, if that makes a difference.
How can I display the views so they're correctly aligned?
Ok it makes sense now that I looked more carefully. Why are you presening a view controller modally when you wish to go back? How did you showed this viewController initially? If it was through a navigation controller you should pop the view
[self.navigationController popViewControllerAnimated:YES];
If it was presented modally you should just dismiss it!
[self dismissViewControllerAnimated:YES];
I'm very new with iOS Development and I have just created one of my first apps, in my .xib file I have a UINavigationBar that I want to hide/show when a part of the screen is tapped by the user (like in the Photo app). I've found some snippets online but I don't know where and how to use those.
I'd appreciate a lot if somebody could give me detailed informations about how to do this.
Add this toggle method anywhere in your UIViewController. This hides on first tap and shows again in second tap.
- (void)toggleNavBar:(UITapGestureRecognizer *)gesture {
BOOL barsHidden = self.navigationController.navigationBar.hidden;
[self.navigationController setNavigationBarHidden:!barsHidden animated:YES];
}
If there is no navigation controller, link the navigation bar with an IBOutlet and replace with
- (void)toggleNavBar:(UITapGestureRecognizer *)gesture {
BOOL barsHidden = self.navBar.hidden;
self.navBar.hidden = !barsHidden;
}
Then add the following in the method -(void)viewDidLoad {}
UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(toggleNavBar:)];
[self.view addGestureRecognizer:gesture];
[gesture release];
If the view where you are going to tap is a UIWebViewController, you have to add the protocol to the view controller and set it as delegate gesture.delegate = self; then add the following:
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}
This is needed because the UIWebViewController already implements its own gesture recognizers.
Ultimately, you want to send the -setHidden: message to your navigation bar. The easiest way to do this is to make an Outlet and an Action in your in your view controller. Then, in your .xib file, connect the navigation bar to the outlet and some button (even a large, full screen one) to the action.
Outlets and Actions are basic techniques used over and over in iOS
(and Mac) programming, so if you don't understand them, best go read
up on them now. Every beginning iOS/Mac programming book covers this
topic as does Apple's own Getting Started guide (pay particular
attention to the Configuring the View section).
Inside your action, send a message to the outlet like so:
-(void)myButtonAction:(id)sender{
[[self myNavigationBarOutlet] setHidden:YES];
}
This will hide the navigation bar whenever your button is tapped.
(This assumes you have a UINavigationBar in your .xib like you say. These directions will be different if you're working with a UINavigationController that manages its own UINavigationBar)
I am currently using XCode 3.2.3 and iOS4. I'm working on an app that simply starts with one screen and on a button click moves to the next.
I have gone thorugh the ViewController programming guide and a post here.
What I am doing is very similar to whats happening on the post. So let me explain the steps, I followed:
In IB, drag and drop, a View from the library into the editor. I renamed the new UIView to myView.
In my AppControllerDelegate, I added the new view "myView" as a property of the view controller (File's Owner). I synthesized it as well in the implementation.
Now, in the implementation of the ViewController, within the button pressed action handler, I wrote the following lines of code:
[self.view addSubView: myView];
On clicking the button however, I do not see a new screen or my new view. However if I do this, I get a new screen or new view:
UIView *anotherView = [[UIView alloc] initWithFrame:self.view.frame];
[self.view addSubView: anotherView];
I do know that the best way is to do it with separate NIBs for each UIView. However, I am new to iPhone development and have not explored that path as yet.
My question: What am I missing upto step 3?
One way you could be able to do it is by trying it this way
myView = [[MyViewController alloc] initWithNibName:#"MyViewController" bundle: [NSBundle mainBundle]];
[self.view addSubview: myView.view];
Try that and see if it is working.. if yours is a view based project then instead of [self.view addSubview: myView.view], just give [self.view addSubview : myView];