i have two questions:
1>can anyone suggest me a good tutorial for:
ViewTransitions (transitions between 2 views)
- all variations (curl, flip etc)
2> i am making a tabbased application where i have navigation in each tab, i hide it but now i have to put a png of back button where previously navbar was present .. how can i put that custom png and how to redirect it to previous page...
thanks in advance...
UIButton *btn_back_en=[[UIButton alloc] initWithFrame:CGRectMake(168,20, 257.134, 54.512)];
[btn_back_en setImage:[UIImage imageNamed:#"Back.png"] forState:UIControlStateNormal];
[self.view addSubview:btn_back_en];
[btn_back_en release];
[btn_back_en addTarget:self action:#selector(viewlo) forControlEvents:UIControlEventTouchUpInside];
-(void)viewlo
{
info *viewController = [[info alloc] init];
[self.navigationController pushViewController:viewController animated:YES];
[viewController release];
}
Related
I haven't embedd navigation controller with my view controller. Now i'm using a code to go back to home screen to with the use of back button but there nothing appears, i don't know why. I don't want to use navigation controller in my vc. This is the code,
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:#"car_marker.png"]
style:UIBarButtonItemStylePlain
target:self.navigationController
action:#selector(popViewControllerAnimated:)];
self.navigationItem.leftBarButtonItem = backButton;
It should look like this only,
You will need to change your approach because you cannot pop without a navigation controller.
You should embed your viewcontroller into navigation controller and then you can hide with [[self navigationController] setNavigationBarHidden:YES animated:YES]; and then you can add any kind of custom button to perform pop action.
For adding a custom back button to your view
- (void)addCustomBackButtonToView
{
UIButton *backButton = [[UIButton alloc] initWithFrame: CGRectMake(20, 20, 44.0f, 30.0f)];
[backButton setImage:[UIImage imageNamed:#"back.png"] forState:UIControlStateNormal];
[backButton addTarget:self action:#selector(popVC) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:backButton];
}
- (void) popVC{
[self.navigationController popViewControllerAnimated:YES];
}
You can hide your navigation controller by below code self.navigationController.navigationBar.isHidden = true
and use swipegesture option to move back, even though you have to use navigation controller,#iPeter has a valid point.
1) Add two ViewControllers make first as initial controller(entry point).
2) Add view on both ViewController with size you wish to have.
3) Add buttons on both views as subviews.
4) create segue from firstButton ->(use show) -> second controller.
5) From second ->(use show) -> first controller.
see the image below-:
This is not preferred way of doing pop/push. You must use Navigation Controller(that works like a stack for controllers you push) that will provide you default Back button or you can create custom .
You can not push or pop view controllers as you are not using the Navigation controller. Try using Present & dismiss controller which can called from any controller Instace.
Step 1 : Present to " Controller which is shown with no navigation bar but back button"
[self presentViewController:#"<ViewControllerToBePresented>" animated:NO completion:nil];
Step 2: add backBatton in ViewDidLoad
-(void)addBack{
UIButton *backBtn = [[UIButton alloc] initWithFrame: CGRectMake(20.0f, 20.0f, 50.0f, 30.0f)];
[backBtn setTitle:#"back" forState:UIControlStateNormal];
[backBtn addTarget:self action:#selector(dismissViewController) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:backBtn];
}
Step 3: Dismisscontroller to go back to previous scene
-(void) dismissViewController{
[self dismissViewControllerAnimated:NO completion:nil];
}
I am using storyboard in my app where I have to navigate to another view controller without animation.I am successfully doing it using the custom segue.But I when I come back to the previous view controller then by using navigation bar default back button then it is animating while coming backward.So going forward it is not animating and going backward it is animating.I want to stop the default animation of the back button.
Custom Seague
// PushNoAnimationSegue.h
#interface PushNoAnimationSegue : UIStoryboardSegue
#end
// PushNoAnimationSegue.m
#implementation PushNoAnimationSegue
-(void) perform{
[[[self sourceViewController] navigationController] pushViewController:[self destinationViewController] animated:NO];
}
#end
Using this code I am successfully going to the next view controller without animation since -(void) perform is called automatically in the forward direction.When I come back it is not called.So please suggest me if there is anything wrong with the implementation or I should go with some other method.
hope this will help
1.custom button on navigation bar
UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(x,y,width,height)];
[btn setImage:[UIImage imageNamed:#"some_image.png"] forState:UIControlStateNormal];
[btn addTarget:self action:#selector(popViewController) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *backButtonItem = [[UIBarButtonItem alloc] initWithCustomView:btn];
self.navigationItem.leftBarButtonItem =backButtonItem;
and then
void popViewController()
{
[self.navigationController popViewControllerAnimated:NO];
}
If you use NavigationController then use this
[self.navigationController popViewControllerAnimated:NO];
Or
[self dismissViewControllerAnimated:NO completion:nil];
In UINavigationController?
For example, say I want to make sure that the UINavigationController is not animating when user press the back button.
If you aren't intending to intercept the back button tap itself but instead the act of the current view controller disappearing, you can use:
- (void)viewWillDisappear:(BOOL)animated {
if (self.isMovingFromParentViewController) {
// handle back button press
}
}
If you are sure you want to do the back button, you can create your own custom UIBarButtonItem and set it to the current controller's leftBarButtonItem. Be sure to call [self.navigationController popViewControllerAnimated:YES] after you have finished doing your own logic.
Add below code in ViewDidLoad of your application :
UIButton *btnBack = [UIButton buttonWithType:UIButtonTypeCustom];
[btnBack setFrame:CGRectMake(0.0f, 0.0f, 55.0f, 35.0f)];
[btnBack addTarget:self action:#selector(backClicked:) forControlEvents:UIControlEventTouchUpInside];
[btnBack setImage:[UIImage imageNamed:#"back.png"] forState:UIControlStateNormal];
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithCustomView:btnBack];
self.navigationItem.leftBarButtonItem = backButton;
This create a custom Back button. "Back.png" is image same as that of OS.
Add below code as function. This one pops to RootViewcontroller.
- (void) backClicked:(id)sender {
// perform certain task
// If task is completed then call below LOC
[self.navigationController popToRootViewControllerAnimated:YES]; }
I don't know if the title explains the question itself but here it is ...
I have a UINavigationController which is the parentViewController of a UINavigationController. The thing is the childViewController behaves strange, when I add it as a child it first has the gap for the statusBar (it doesn't occupy the entire screen) and if I "solve" that "bug" by hiding and showing the navigationBar, the gap goes away but now the child doesn't respect the frame I set manually.
Then I tried to continue and when I presented a modal on the child and dismiss it, the entire child goes away ...
What would be wrong there? The parent-child relationship with both containers or what?
Thanks in advice
EDIT: Here's an example project showing the strange behavior
http://www.mediafire.com/?8saa68daqfkf335
EDIT 2: I found a solution actually and I didn't find it really clear on Apple Docs, it says the childViewControllers take its frame from the parentViewController they belong to, but it doesn't say that if the parentViewController "reappears" (like a push on it) the childViewControllers get resized again by the parentViewController frame ... Hope this helps anyone
I believe it would be better to present the second navigation view controller as a modal view controller.
For example, replace your current presentController selector with something like:
- (void)presentController:(id)sender {
ChildViewController1 *cvc = [[ChildViewController1 alloc] initWithNibName:#"ChildViewController1" bundle:nil];
nc3 = [[UINavigationController alloc] initWithRootViewController:cvc];
nc3.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self presentViewController:nc3 animated:YES completion:nil];
UIBarButtonItem *i = [[UIBarButtonItem alloc] initWithTitle:#"X" style:UIBarButtonItemStyleBordered target:self action:#selector(close)];
cvc.navigationItem.leftBarButtonItem = i;
}
Then, your close selector could become:
- (void)close {
[nc3 dismissViewControllerAnimated:YES completion:nil];
}
(though I'd recommend moving the creation of the button and handling the close actually in ChildViewController1.m).
Of course, this would take all the creation of the navigation controller off ViewController.m's viewDidLoad selector:
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor blueColor];
UIButton *b = [UIButton buttonWithType:UIButtonTypeRoundedRect];
b.frame = CGRectMake(0, 100, 100, 40);
[b setTitle:#"present" forState:UIControlStateNormal];
[b addTarget:self action:#selector(presentController:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:b];
}
Hope it works!
Apple's "Mobile Human Interface Guidelines" says about Popovers:
When possible, allow people to close one popover and open a new one
with one tap. This behavior is especially desirable when several
different bar buttons each open a popover, because it prevents people
from having to make extra taps.
The only solution I can think right now is to track the position of the touch when dismissing the popover and check whether that was the position of another button.
Is there any easier way to do this?
PS: I searched in stackoverflow and googled quite a while before posting. Sorry, if this was asked here before.
UPDATE
I guess I didn't explain myself well. Let's say I have three buttons. All of them open a popover. My user taps button #1 and a popover opens. While the popover is open, the user taps button #2. The popover gets dismissed (because the user tapped outside of the popover - default behavior of non-modal popovers) and a new popover opens up because the user had clicked on button #2. All of that without having to tap twice: once to dismiss the popover and twice for opening the new one.
2nd UPDATE
I built a simple dummy to reproduce what I'm trying to do. When the user taps on a button and a popover is open, the method that opens the popovers doesn't get called. Therefore the user has to click twice to open the second popover. Any ideas?
#import "RootViewController.h"
#import "AViewController.h"
#interface RootViewController()
#property (nonatomic, retain) UIPopoverController *currentPopover;
#end
#implementation RootViewController
#synthesize currentPopover;
- (void)loadView
{
CGRect applicationFrame = [[UIScreen mainScreen] applicationFrame];
UIView *view = [[UIView alloc] initWithFrame:applicationFrame];
CGRect buttonFrame = CGRectMake(50, 100, 200, 40);
for (int i = 0; i < 3; i++)
{
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button setTitle:[NSString stringWithFormat:#"Button %i", i + 1] forState:UIControlStateNormal];
[button addTarget:self action:#selector(openPopover:) forControlEvents:UIControlEventTouchDown];
[button setFrame:buttonFrame];
[view addSubview:button];
buttonFrame.origin.y += 50;
}
self.view = view;
[view release];
}
- (IBAction)openPopover:(id)sender
{
AViewController *avc = [[AViewController alloc] init];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:avc];
[avc release];
UIPopoverController *tempPopover = [[UIPopoverController alloc] initWithContentViewController:navigationController];
[tempPopover setDelegate:self];
[tempPopover setPopoverContentSize:CGSizeMake(320, 500)];
[tempPopover presentPopoverFromRect:[sender frame] inView:[self view] permittedArrowDirections:UIPopoverArrowDirectionLeft animated:YES];
self.currentPopover = tempPopover;
[tempPopover release];
[navigationController release];
}
- (void)dealloc
{
[currentPopover release];
[super dealloc];
}
#end
If you use bar button items in a toolbar, the open popover is not automatically closed when you tap another bar button item. In these situations you should close the visible popover and open the other one in one step.
- (IBAction)sortAction {
[searchBarView resignFirstResponder];
[self.popoverController dismissPopoverAnimated:YES]; //clear popover
self.popoverController = popoverSetting;
[self.popoverController presentPopoverFromBarButtonItem:sortBarButtonItem
permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES]; //show popover
}
hope will help you
Lets say you have 3 buttons and each opens a popup. You could use a state variable that tracks whether a popup is currently open, and inside each "open popup" method, close the existing one (if it is open) before opening the new popup.