I have a MBProgressHUD that I want to display when switching tabs. This is in my app delegate. I have this code here to display the HUD on only the first three tabs
-(void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController{
if ([viewController isKindOfClass:[UINavigationController class]]) {
if (tabBarController.selectedIndex >= 3) {
UINavigationController *nav = (UINavigationController *) viewController;
[nav popToRootViewControllerAnimated:NO];
}
else {
UINavigationController *nav = (UINavigationController *) viewController;
HUD = [[MBProgressHUD alloc] initWithView:nav.view];
[nav.view addSubview:HUD];
HUD.labelText = #"Loading";
[HUD show:YES];
[nav popToRootViewControllerAnimated:NO];
}
}
}
The first time I view my page it works but going back to it a second time it doesn't hide. I have my [appDel.HUD hide:YES afterDelay:1.0]; in my viewDidAppear.
How can I get the HUD to hide every time I visit the page?
I think you may be adding the MBProgressHUD to a different view within the UINavigationController. Then you're popping to the root, and it's trying to remove an MBProgressHUD that doesn't exist. Try this (untested code)...
UINavigationController *nav = (UINavigationController *) viewController;
[nav popToRootViewControllerAnimated:NO];
if(![nav.visibleViewController.view.subViews containsObject:MBProgressHUD])
{
[MBProgressHUD showHUDAddedTo:nav.visibleViewController.view animated:YES];
MBProgressHUD.labelText = #"Loading";
}
else
{
[MBProgressHUD setHidden:NO];
}
you have to check if the MBProgressHUD view was already activated if so hid it, or simply do so:
if (!HUD) {
[self showLoadingHUD];
}
Related
In one stack I am displaying the MBProgressHUD and if by using the other stack when some calculation called I want MBProgressHUD to remove from the view but it is not been removed from the hud ..check what mistake I am doing..
first stack called LoginViewController.m
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[MBProgressHUD showHUDAddedTo:self.view animated:YES];
}
-(void)myTask {
// Do something usefull in here instead of sleeping ...
[MBProgressHUD hideHUDForView:self.view animated:YES];
[self.hud hide:YES];
self.hud=nil;
[self.hud removeFromSuperview];
//[self.hud showWhileExecuting:#selector(myTask1) onTarget:self withObject:nil animated:YES];
}
now theViewController get calls but view will be same Previous and
after some calculation and I want that in ViewController I want to remove theHUD from the view by calling the method in the LoginViewController..check code
- (void)didReceiveResponseFromServer:(NSString *)responseData
{
login=[[LoginViewController alloc]init];
[self.login myTask];
}
Set UP MBProgressHUD
- (void) setupHUD
{
//setup progress hud
self.HUD = [[MBProgressHUD alloc] initWithFrame:self.window.bounds];
[self.SpurView addSubview:self.HUD]; // add it as here.
self.HUD.dimBackground = YES;
self.HUD.minSize = CGSizeMake(150.f, 150.f);
self.HUD.delegate = self;
self.HUD.labelText = #"Loading...";
}
Then use for hide [self.HUD hide:YES]; as describe in your code .
like me ,
I tyr [MBProgressHUD hideHUDForView:bAnimatedView animated:YES]
but it will no work at times when I quick push in and back out .
So I add something to check the view of MBProgressHUD.
MBProgressHUD *HUD = [MBProgressHUD HUDForView:bAnimatedView];
if (HUD!= nil) {
[HUD removeFromSuperview];
HUD=nil;
}
I use MBProgressHUD when loading data and user can press the another tab button during the process. MBProgressHUD only disable the view contents.
I checked other posts but didn't see anything helps me to disable the tab button.
I tried to set tabbaritem.userInteractionEnabled to NO but I couldn't find a way to access that. I can do it in storyboard but can't switch it back to YES.
My question is; from my viewController is there any way to access tabbarcontroller.tabbaritem.userInteractionEnabled ?
I use category:
UIViewController+MBProgressHUD.h
#import <UIKit/UIKit.h>
#class MBProgressHUD;
#interface UIViewController (MBProgressHUD)
- (MBProgressHUD *)showHUD;
- (MBProgressHUD *)showHUDFromTitle:(NSString *)title;
- (MBProgressHUD *)showHUDFromTitle:(NSString *)title completedImage:(BOOL)completedImage;
- (void)hideHUD;
#end
And UIViewController+MBProgressHUD.m
#import "UIViewController+MBProgressHUD.h"
#import <MBProgressHUD/MBProgressHUD.h>
#implementation UIViewController (MBProgressHUD)
- (MBProgressHUD *)showHUDFromTitle:(NSString *)title {
UIView *view;
if (self.tabBarController.view != nil) {
view = self.tabBarController.view;
} else if (self.navigationController.view != nil) {
view = self.navigationController.view;
} else {
view = self.view;
}
MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:view animated:NO];
hud.labelText = title;
return hud;
}
- (MBProgressHUD *)showHUD {
return [self showHUDFromTitle:NSLocalizedString(#"Loading", #"Loading")];
}
- (MBProgressHUD *)showHUDFromTitle:(NSString *)title completedImage:(BOOL)completedImage {
MBProgressHUD *hud = [self showHUDFromTitle:title];
if (completedImage) {
UIImage *checkmarkImage = [UIImage imageNamed:#"37x-Checkmark"];
UIImageView *checkmarkImageView = [[UIImageView alloc] initWithImage:checkmarkImage];
hud.customView = checkmarkImageView;
hud.mode = MBProgressHUDModeCustomView;
} else {
hud.mode = MBProgressHUDModeText;
}
return hud;
}
- (void)hideHUD {
[MBProgressHUD hideAllHUDsForView:self.tabBarController.view animated:NO];
[MBProgressHUD hideAllHUDsForView:self.navigationController.view animated:NO];
[MBProgressHUD hideAllHUDsForView:self.view animated:NO];
}
Example:
[self showHUD];
[self hideHUD];
This is an easy way
[[[self tabBarController] tabBar] setUserInteractionEnabled:NO];
As stated in this link: How can I make the tabbar action hidden when the view is loading?
Works great with MBProgressHUD
Even more elegant to show the HUD from UITabBarController, since user interaction will be entirely controlled by MBProgressHUD until hideAnimated: is called:
// Show HUD from Tab Bar, to disable the tab bar items:
MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.tabBarController.view
animated:YES];
// Do some time-consuming stuff:
...
// Hide HUD and enable tab bar items:
[hud hideAnimated:YES];
This is the code I'm using to present a modal view when the app first starts
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
Security *security = [[Security alloc] initWithNibName:#"Security" bundle:nil];
[self.tabBarController.selectedViewController presentModalViewController:security animated:YES];
[security release];
return YES;
}
This is what the log says
Unbalanced calls to begin/end appearance transitions for <UITabBarController: 0x171320>.
Is there a better way to achieve this?
Also I have this method in my app delegate
-(BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController {
if (viewController == [tabBarController.viewControllers objectAtIndex:2]) {
//The Log Out tab locks the app by presenting a modalviewcontroller that can't be dismissed unless there is a password.
Security *security = [[Security alloc] initWithNibName:#"Security" bundle:nil];
[self.tabBarController presentModalViewController:security animated:YES];
[security release];
return NO;
} else {
return YES;
}
}
Basically one of the options on my tabbarcontroller is a logout button. The above code works fine and doesn't throw a warning to the log.
Why are you presenting it from your tab bar controller? Assuming your above code is from a UIViewController, try
[self presentModalViewController:security animated:YES];
or
[self.navigationController presentModalViewController:security animated:YES];
So I have a UITabBarController app and I want to display a login page, and so I did:
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(userDidLogin:) name:UserDidLoginNotification object:nil];
LoginViewController* loginViewController = [[LoginViewController alloc] init];
self.tabBarController.selectedViewController = [self.tabBarController.viewControllers objectAtIndex:0];
[self.tabBarController.selectedViewController presentModalViewController:loginViewController animated:NO];
[loginViewController release];
Inside my LoginViewController I can as well show another modalViewController:
- (void) twitterLogin: (UIViewController *) askingView
{
UIViewController *controller = [SA_OAuthTwitterController controllerToEnterCredentialsWithTwitterEngine: _twitter delegate: self];
if (controller) {
self.askingView = askingView;
[askingView presentModalViewController: controller animated: YES];
}
}
I have the following method where the askingView is the LoginViewController,
when I want to dismiss this I do:
[self.askingView dismissModalViewControllerAnimated:YES];
[[NSNotificationCenter defaultCenter] postNotificationName:UserDidLoginNotification object:nil];
However, this doesn't dismiss the LoginViewController and show the UITabBarController views.. it just dismisses my modalViewController shown from the LoginvVIewController. What am I doing wrong here? I am also getting the following error:
attempt to dismiss modal view controller whose view does not currently appear. self = <LoginViewController: 0x2aff70> modalViewController = <SA_OAuthTwitterController: 0x2d2a80>
2011-09-16 09:45:37.750 VoteBooth[4614:707] attempt to dismiss modal view controller whose view does not currently appear. self = <MainViewController: 0x29fec0> modalViewController = <LoginViewController: 0x2aff70>
In order to dismiss a modal view that is presented over another modal view, you have to call dismissModalViewControllerAnimated: on the parent of the parent. I have used this in some of my apps and it has worked beautifully for me (after many painstaking hours trying to figure it out). Here is exactly what I've used:
[[[self parentViewController] parentViewController] dismissModalViewControllerAnimated:YES];
if ([self respondsToSelector:#selector(presentingViewController)]) {
[self.presentingViewController.presentingViewController dismissModalViewControllerAnimated:YES]; // for IOS 5+
} else {
[self.parentViewController.parentViewController dismissModalViewControllerAnimated:YES]; // for pre IOS 5
}
If you have a dynamic UX and do not know how many parents to go to, you can use this recursive function to figure it out...
- (void) goHome
{
//Dismiss modal back to home page
int numberOfVcsToDismiss = [self findRootViewController:self];
[self dismissToRootVc:numberOfVcsToDismiss];
}
- (int) findRootViewController:(UIViewController*)vc
{
if(vc)
{
return 1 + [self findRootViewController:vc.presentingViewController];
}
return 0;
}
- (void) dismissToRootVc:(int)count
{
if(count == 1)
[self dismissViewControllerAnimated:YES completion:^{}];
if(count == 2)
[self.presentingViewController dismissViewControllerAnimated:YES completion:^{}];
if(count == 3)
[self.presentingViewController.presentingViewController dismissViewControllerAnimated:YES completion:^{}];
if(count == 4)
[self.presentingViewController.presentingViewController.presentingViewController dismissViewControllerAnimated:YES completion:^{}];
if(count == 5)
[self.presentingViewController.presentingViewController.presentingViewController.presentingViewController dismissViewControllerAnimated:YES completion:^{}];
//etc....
}
I have a MKMapView (also a UIPopoverControllerDelegate) with Annotations. This MapView has, in the MKTestMapView.h file, a UIPopoverController* popoverController defined in the #interface and a #property (nonatomic, retain) UIPopoverController* popoverController; defined outside of the #interface section. This controller is #synthesized in the MKTestMapView.m file and it is released in the - (void)dealloc section. The Annotations in this MapView have rightCalloutAccessoryViews defined to the following:
- (void)mapView:(MKMapView *)mapView2 annotationView:(MKAnnotationView *)aview calloutAccessoryControlTapped:(UIControl *)control{
...
CGPoint leftTopPoint = [mapView2 convertCoordinate:aview.annotation.coordinate toPointToView:mapView2];
int boxDY=leftTopPoint.y;
int boxDX=leftTopPoint.x;
NSLog(#"\nDX:%d,DY:%d\n",boxDX,boxDY);
popoverController = [[UIPopoverController alloc] initWithContentViewController:controller];
popoverController.delegate = self;
CGSize maximumLabelSize = CGSizeMake(320.0f,600.0f);
popoverController.popoverContentSize = maximumLabelSize;
CGRect rect = CGRectMake(boxDX, boxDY, 320.0f, 600.0f);
[popoverController presentPopoverFromRect:rect inView:self.view permittedArrowDirections:UIPopoverArrowDirectionRight animated:YES];
...
}
Now here comes the fun part. First of all, I am not sure if I need maximumLabelSize and the rect to be the same size. I am new to the popovercontroller so I am playing this by ear..
Okay, the popover shows. Now to dismissing it. I can click anywhere on mapView2 and the popover goes away...but I need the user to click a button in the view if they change anything. URGH!
The docs show:
To dismiss a popover programmatically,
call the dismissPopoverAnimated:
method of the popover controller.
Well, here is the problem: By definition of how the popoverController works, you are clicking inside the view of the displayed popover (to click the button) but have to trigger the dismissPopoverAnimated: method of the controller that launched this popover view, in my case, the popoverController inside the MKTestMapView.m file.
Now, having said all that, remember, [popoverController release] doesn't happen until:
- (void)dealloc {
[popoverController release];
[mapView release];
[super dealloc];
}
So, do i just do the following inside the button (messy but may work):
(Assuming my popover view is a TableView) In the:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
MKTestMapView * mKTestMapView = [[MKTestMapView alloc] init];
[[mKTestMapView popoverController].dismissPopoverAnimated:YES];
}
Here is my issue: I cannot figure out whether doing the above gives me a reference (if there is such a thing) to the existing view that is on the screen -- and therefore the view that is the owner of that popoverController. If it is as simple as
[[[self parentView] popoverController].dismissPopoverAnimated:YES];
I will shoot myself cos I don't think that is the correct syntax either!
This should be easy...yet I am lost. (probably just frustrated with so many iPad differences that I am learning).
Can anyone explain more?
I had the same problem... I had a neat "close" button (X) in the top of my view loaded by the popover, but it didn't work. In my universal app it will be presented as a new view, so that code should stay.
What I did now was that I added the following to my detailedPinView (the view the popover loads):
in the detailedPinView.h file:
#interface detailedPinView : UIViewController {
[...]
UIPopoverController *popover;
[...]
}
-(void)setPopover:(UIPopoverController*)aPopover;
In the detailedPinView.m file:
- (void)setPopover:(UIPopoverController*)aPopover
{
popover = aPopover;
}
The X button closes the view using an IBAction, this is what I did there:
In the detailedPinView.m file:
-(IBAction)releaseDetailedView:(UIButton *)sender
{
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
{
if (popover != nil)
{
[popover dismissPopoverAnimated:YES];
}
else {
NSLog(#"Nothing to dismiss");
}
}
else{
[self.parentViewController dismissModalViewControllerAnimated: YES];
}
}
In the class loading the my map and the popover view I added the following code:
[...]
-(void)mapView:(MKMapView *)theMapView annotationView:(MKAnnotationView *)pin calloutAccessoryControlTapped:(UIControl *)control
{
UIViewController *detailController = [[detailedPinView alloc] initWithNibName:#"detailedPinView"
bundle:nil
annotationView:pin];
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
{
UIPopoverController* aPopover = [[UIPopoverController alloc] initWithContentViewController:detailController];
[aPopover setDelegate:self];
[aPopover setPopoverContentSize:CGSizeMake(320, 320) animated:YES];
[detailController setPopover:aPopover];
[detailController release];
[mapView deselectAnnotation:pin.annotation animated:YES];
self.popoverController = aPopover;
[mapView setCenterCoordinate:pin.annotation.coordinate animated:YES];
[self.popoverController presentPopoverFromRect:CGRectMake(382,498,0,0) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
}
else
{
[self presentModalViewController: detailController animated:YES];
}
[detailController release];
}
[...]
I don't know if the was the answer you were hoping for, I think it might be a bit of a messy way to do it... but giving the time schedule this worked like a charm :)
Here is another simple solution.
I found that we should follow the following steps for clearly dismissing popovers.
dismiss a popover.
release a view loaded by the popover.
Before iOS8, almost all of us may release a view loaded by a popover first, and then we programmatically dismiss the popover.
However, in iOS8, we do the steps in revers.
Before iOS8, my code of dismissing a popover
// creating a popover loading an image picker
picker = [[UIImagePickerController alloc] init];
...
pickerPopover = [[UIPopoverController alloc] initWithContentViewController:picker];
[pickerPopover presentPopoverFromRect:aFrame inView:aView permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
// dismissing the popover
[picker.view removeFromSuperview]; // (1) release a view loaded by a popover
[picker release], picker = nil;
if( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad ) {
[pickerPopover dismissPopoverAnimated:YES]; // (2) dismiss the popover
}
In iOS8, the dismissing code part should be changed as below,
if( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad ) {
[pickerPopover dismissPopoverAnimated:YES]; // (2) dismiss the popover first
}
[picker.view removeFromSuperview]; // (1) and then release the view loaded by the popover
[picker release], picker = nil;