I need to call the flutter engine all time
.So I given the code as below.
In the appdelegate.h file
#property (nonatomic,strong) FlutterEngine *flutterEngine;
In the appdelegate.m file
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.flutterEngine = nil;
//Flutter module initialization
self.flutterEngine = [[FlutterEngine alloc] initWithName:#"my flutter engine"];
// Runs the default Dart entrypoint with a default Flutter route.
[self.flutterEngine run];
// Used to connect plugins (only if you have plugins with iOS platform code).
[GeneratedPluginRegistrant registerWithRegistry:self.flutterEngine];
}
Then HomeVC.m file
FlutterEngine *flutterEngine = ((IKAppDelegate *)UIApplication.sharedApplication.delegate).flutterEngine;
if (flutterEngine != nil) {
}
flutterEngine = nil;
flutterEngine = [[FlutterEngine alloc] initWithName:#"my flutter engine"];
[flutterEngine run];
[GeneratedPluginRegistrant registerWithRegistry:flutterEngine];
FlutterViewController *flutterViewController = [[FlutterViewController alloc]initWithEngine:flutterEngine nibName:nil bundle:nil];
FlutterMethodChannel* moduleChannel = [FlutterMethodChannel
methodChannelWithName:#"com.ikea.kompis/nativeToFlutter"
binaryMessenger:flutterViewController.binaryMessenger];
[moduleChannel invokeMethod:#"nativeToFlutter"
arguments: jsonString
];
flutterViewController.modalPresentationStyle = UIModalPresentationFullScreen;
// [self presentViewController:flutterViewController animated:YES completion:nil];
[self presentViewController:flutterViewController animated:YES completion:nil];
But getting as crash.
my flutter engine.3.profiler (52): EXC_BAD_ACCESS (code=EXC_I386_GPFLT)
this can happen at any time .So how can fix this issuse
Related
I'm using SFSafariViewController to grab user's cookie in my app. Here's is my code:
SFSafariViewController *safari = [[SFSafariViewController alloc]initWithURL:[NSURL URLWithString:referrerUrl] entersReaderIfAvailable:NO];
safari.delegate = self;
safari.modalPresentationStyle = UIModalPresentationOverCurrentContext;
safari.view.alpha = 0.0;
safari.view.hidden = true;
[self dismissViewControllerAnimated:false completion:nil];
NSLog(#"[referrerService - StoreViewController] presenting safari VC");
[self presentViewController:safari animated:false completion:nil];
This works well on iOS 9. but on iOS 10 it seems that the SF controller doesn't work (it also block my current context - which happens to be another UIWebView).
Anyone can suggest of an alternative way to hide a SFSafariViewController?
Updated answer:
Apple prohibits this kind of SafariViewController usage in last version of review guidelines:
SafariViewContoller must be used to visibly present information to users; the controller may not be hidden or obscured by other views or layers. Additionally, an app may not use SafariViewController to track users without their knowledge and consent.
Old answer:
In iOS 10 there are some additional requirements for presented SFSafariViewController:
1) Your view should not be hidden, so hidden should be set to NO
2) The minimum value for alpha is 0.05
3) You need to add controller manually with addChildViewController: / didMoveToParentViewController: (callback's doesn't called otherwise).
4) UIApplication.keyWindow.frame and SFSafariViewController.view.frame should have non-empty intersection (in appropriate coordinate space), that means:
safari view size should be greater than CGSizeZero
you can't place safari view off the screen
but you can hide safari view under your own view
Code example:
self.safariVC = [[SFSafariViewController alloc] initWithURL:referrerUrl];
self.safariVC.delegate = self;
self.safariVC.view.alpha = 0.05;
[self addChildViewController:self.safariVC];
self.safariVC.view.frame = CGRectMake(0.0, 0.0, 0.5, 0.5);
[self.view insertSubview:self.safariVC.view atIndex:0];
[self.safariVC didMoveToParentViewController:self];
Also, don't forget to remove safariVC properly after the end of the usage:
[self.safariVC willMoveToParentViewController:nil];
[self.safariVC.view removeFromSuperview];
[self.safariVC removeFromParentViewController];
New info: Don't do this.
The revised App Store guidelines prohibit this practice.
https://developer.apple.com/app-store/review/guidelines/
I'll leave this below for posterity:
I call the following code from my app delegate's didFinishLaunchingWithOptions.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[self checkCookie];
}
- (void)checkCookie
{
NSURL *url = [NSURL URLWithString:#"http://domainToCheck.com"];
SFSafariViewController *vc = [[SFSafariViewController alloc] initWithURL:url];
vc.delegate = self;
UIViewController *windowRootController = [[UIViewController alloc] init];
self.secondWindow = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
self.secondWindow.rootViewController = windowRootController;
[self.secondWindow makeKeyAndVisible];
[self.secondWindow setAlpha:0.1];
[windowRootController presentViewController:vc animated:NO completion:nil];
self.window.windowLevel = 10;
}
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url options:(nonnull NSDictionary<NSString *,id> *)options
{
[self.secondWindow.rootViewController dismissViewControllerAnimated:NO completion:nil];
self.secondWindow = nil;
self.window.windowLevel = 0;
return YES;
}
I was able to achieve this affect using invisible child view controller:
_safariViewController = [[SFSafariViewController alloc] initWithURL:_requestURL];
_safariViewController.delegate = self;
_safariViewController.view.userInteractionEnabled = NO;
_safariViewController.view.alpha = 0.0;
[_containerViewController addChildViewController:_safariViewController];
[_containerViewController.view addSubview:_safariViewController.view];
[_safariViewController didMoveToParentViewController:_containerViewController];
_safariViewController.view.frame = CGRectZero;
its possible to use this on swift 3 for xcode 8.3.2 becausa i get all i delegate anduse correctly , but i have this error
[12:05]
2017-04-25 12:05:03.680 pruebaslibrary[7476:136239] Warning: Attempt to present on whose view is not in the window hierarchy!
Im trying to present the ImagePicker in Landscape with a landscape only app that embedded in UINavigationController. None of the answers I've found are working. Apparently this is possible now. Ive found a way to do this in Swift from here, but I'm not using Swift. Perhaps someone can help me convert this Swift code to Objective-C or provide a real working example in Objective-C. It looks like many people would benefit from this. Thanks for helping in advance.
Working Swift Code that needs converting to Objective-C:
//Appdelegate.swift
func application(application: UIApplication, supportedIntefaceOrentationForWindow window: UIWindow?) ->UIInterfaceOrientationMask{
if let presentViewController = window?.rootViewController?.presentedViewController {
if (presentViewController.isKindOfClass(UIImagePickerController) && !presentViewController.isBeingDismissed() ) {
return UIInterfaceOrientationMask.Portrait
}
}
return UIInterfaceOrientationMask.Landscape
}
Objective-C Code I'm using to present the Image Picker gives a SIGBART error from the app delegate "Works fine with portrait enabled otherwise":
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
imagePicker.mediaTypes = [[NSArray alloc] initWithObjects:(NSString *)kUTTypeMovie, nil];
UIViewController *viewController = self.view.window.rootViewController;
[viewController presentViewController: imagePicker animated: YES completion:nil];
This is the Objective-C code.
- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
if (([window.rootViewController.presentedViewController isKindOfClass:[UIImagePickerController class]]) && (window.rootViewController.presentedViewController.isBeingDismissed == NO)) {
return UIInterfaceOrientationMaskPortrait
}
return UIInterfaceOrientationMaskLandscape
}
I'm working in Xcode 4.3.2
I implemented Local Notifications that alert the user of a new event at a predetermined time. So when my app is in the background and the clock strikes 8 am (for instance), the user will get a notification from my app.
When the user decides to view the app from the background I load a nib. Currently, this nib works properly: it shows the view as it was it arranged in the nib. However, after the nib is shown to the user, I want to forward the user to a different view in the LocalNotificationsHandler.m. When I attempt to push the second view, my app fails. So while there isn't an error message, it seems the second nib will not load.
In short the flow goes as follows:
user gets notification while my app is running in the background
user chooses to view the app
the LocalNotificationsHandler nib will load
self.navigationController == nil (in LocalNotificationsHandler.m)
self.navigationController will not "[pushViewController: "new view" animated:YES]" to get a new view
I'm wondering if there is something I'm missing from my AppDelegate.m file so I've included
"didFinishLaunchingWithOptions" from my AppDelegate.m file:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
// Add the navigation controller's view to the window and display.
NSLog(#"did finish launching with options");
[self.window addSubview:tabBarController.view];
[self.window makeKeyAndVisible];
[[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound)];
if (self.locationManager == nil)
{
locationManager = [[CLLocationManager alloc] init];
locationManager.purpose = #"We will try to use you location";
}
if([CLLocationManager locationServicesEnabled])
{
[self.locationManager startUpdatingLocation];
}
self.navigationController.navigationBar.tintColor = nil;
return YES;
}
You are using the outdated (since iOS 3) method of adding the viewcontroller's view to the main UIWindow. That should be looking like this:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// create properly sized window
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// create instance of root VC and assign to window
MainViewController *vc = [[MainViewController alloc] init];
self.window.rootViewController = vc;
[vc release];
[self.window makeKeyAndVisible];
return YES;
}
The navigationController property of a view controller is ONLY set if it is actually presented from a UINavigationController.
See this writeup for more information: http://www.cocoanetics.com/2012/11/revisited/
I have implemented push notifications and am attempting to take the user to another view controller (opposed to just opening the app) when they tap the notification. I was going off of the apple website example but have not had any luck yet.
It seems that it never even enters my code as it should. I tried putting an NSLog to prove that and I was right.
Does anyone know why? The view controller I want implemented is called statsViewController.
Thanks
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
NSDictionary *remoteNotif = [launchOptions objectForKey: UIApplicationLaunchOptionsRemoteNotificationKey];
if (remoteNotif) {
NSLog (#"We are here now");
[self handleRemoteNotification:application userInfo:remoteNotif]; //custom method where View controller will be implemented
return YES;
}
[window addSubview:tabBarController.view];
[window makeKeyAndVisible];
return YES;
}
-(void) handleRemoteNotification:(UIApplication *)application userInfo:(NSDictionary *)userInfo {
application.applicationIconBadgeNumber = 0;
statsViewController* viewController = [[statsViewController alloc] init];
[navController pushViewController:viewController animated:YES]; //Don't think this is right since I never use it in didFinishLaunching... I simply just declared it delegate.h
[viewController release];
}
I'm using a modified View-Based Application, where I have starting UIViewController showing a input control & a TTThumbsViewController showing the results. I'm passing them in the AppDelegate using TTNavigator initWithName: for the TTThumbsViewController.
I did this by myself reading from the documentation:
The ViewDidLoad method inside my TTThumbsViewController:
- (void)viewDidLoad {
self.photoSource = [[PhotoSource alloc]
initWithType:PhotoSourceNormal
title:myTitle
photos:myImages
photos2:nil
];
}
The implementation of my AppDelegate:
#implementation geoFlickrAppDelegate
#synthesize window=_window;
#synthesize viewController=_viewController;
#synthesize navigator;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
navigator =[TTNavigator navigator];
navigator.window = self.window;
TTURLMap *map = navigator.URLMap;
[map from:#"app://home/" toViewController:[geoFlickrViewController class]];
[map from:#"app://album/(initWithName:)" toViewController:[AlbumController class]];
[navigator openURLAction:[TTURLAction actionWithURLPath:#"app://home/"]];
// Override point for customization after application launch.
[self.window makeKeyAndVisible];
return YES;
}
-(void)toGallery:(NSString*)txt
{
[navigator openURLAction:[TTURLAction actionWithURLPath:txt]];
}
The event inside my UIViewController for pushing the next view:
-(IBAction)search:(id)sender
{
NSString *str = [[NSString alloc] initWithFormat:#"app://album/%#",txtSearch.text];
geoFlickrAppDelegate *appDelegate = (geoFlickrAppDelegate *)[[UIApplication sharedApplication] delegate];
[appDelegate toGallery:str];
}
The result from this code is that the input is passed through my AppDelegate in the TTThumbsViewController using initWithName: but the never gets pushed in & my ViewDidLoad method never gets called. Any idea why is that so?
Whenever I had an error like this, it was the initializer (in your case initWithName:) returning nil. This is the first thing I would check. If that doesn't solve try setting a breakpoint in [TTBaseNavigator presentController:parentURLPath:withPattern:action:].
If that method is not reached something is wrong with your URL-Map. You may for Example need to urlencode your users input. URL-based Navigation works with URLs. Strings that can not be used in URLs can not be passed unencoded.
If that method is reached, you may use the debugger and step through the code from there to find out whats wrong.
Another thing I would like to mention, is that you really do not need to reference your appDelegate with [[UIApplication sharedApplication] delegate] when you like to use the navigator. This is one of the reasons why the navigator is so useful. Try to change the call to:
-(IBAction)search:(id)sender
{
NSString *str = [[NSString alloc] initWithFormat:#"app://album/%#",txtSearch.text];
TTOpenURLFromView(str, self.view);
TTOpenURL(str); // Three20 < 1.0.3
}
You can then get rid of the toGallery: method.
In my code I have no:
navigator.window = self.window;
and instantiate the window calling:
navigator =[TTNavigator navigator];
navigator.window;
and also change [self.window makeKeyAndVisible] into
[navigator.window makeKeyAndVisible]