I am attempting to add an UIImageView as the first view that is shown after my Default.png disappears. This should be super easy but for some reason I am getting a black screen.
// AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UIImageView *newimageview = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
[newimageview setImage:[UIImage imageNamed:#"myimage.png"]];
[_window addSubview:newimageview];
[_window bringSubviewToFront:newimageview];
}
I also tried setting the background color of newimageview to see if I just wasn't loading my image file properly, but the screen still appeared black.
Any help would be appreciated, I feel pretty dumb at the moment.
I just created a new project and modified only the didFinishLaunchingWithOptions method. Here is exactly the code I am using. I changed nothing else in the project:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
UIImageView *newimageview = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"bg-basketball"]];
[self.window addSubview:newimageview];
[self.window bringSubviewToFront:newimageview];
// Override point for customization after application launch.
//self.window.backgroundColor = [UIColor whiteColor];
//[self.window makeKeyAndVisible];
return YES;
}
And i am still getting the same black screen result.
I have added bg-basketball.png and bg-basketball#2x.png to my project and can see both images in XCode.
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.viewController = [[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];//Add this line
This is works for me.
Related
I deleted story board and maininterface and from info plist now black screen appears with this code below
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UIWindow * window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen]bounds] ];
UIViewController *UVC=[[UIViewController alloc] init];
UVC.view.bounds=[[UIScreen mainScreen]bounds] ;
UVC.title=#"AAA";
UVC.view.backgroundColor=[UIColor greenColor];
window.rootViewController = UVC;
[window makeKeyAndVisible];
application.delegate.window=window;
return YES;
}
its ios 13 issue.
I am using the following code in my app delegate to programmatically create the application's window and root controller:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.rootViewController = [[UIViewController alloc] init];
self.window.rootViewController.view = [[UIView alloc] init];
self.window.rootViewController.view.backgroundColor = [UIColor redColor];
return TRUE;
}
The code works fine, however the view associated to the root view controller overlaps the status bar, which I would like to avoid (see picture below).
How should I proceed? In particular I want to have a lightgray background for the status bar (similar to the apps created with a storyboard) and also handle orientation change correctly.
Thanks
Well, you can do something as following:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.rootViewController = [[UIViewController alloc] init];
self.window.rootViewController.view.backgroundColor = [UIColor whiteColor];
UIView *redView = [[UIView alloc] initWithFrame:CGRectMake(0,
[UIApplication sharedApplication].statusBarFrame.size.height,
[UIScreen mainScreen].bounds.size.width,
[UIScreen mainScreen].bounds.size.height)];
redView.backgroundColor = [UIColor redColor];
[self.window.rootViewController.view addSubview:redView];
[self.window makeKeyAndVisible];
return TRUE;
}
should look like this:
I have created two ViewCrontroller using xib and set orientation of UIViews is LandscapeLeft.
and than add this code to
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
The following is my ideal result:
I'd like the window under the status bar in ios 7,
The first view, the result is what I want to get, however, when it jumps to the second view, there is a problem! The window move 20px to the left. how to fit it into the normal view?
3.Most impornatant condition is Autolayout is "TRUE".
my testing code:
https://www.dropbox.com/s/bj9wg4hwar1t8y0/statusbartesting.zip
Can anyone help to solve this problem?
You don't need to change window frame in AppDelegate.
I'll tell you code, please follow it
Appdelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
self.mxfirstciewcontroller = [[firstViewController alloc] initWithNibName:#"firstViewController" bundle:nil];
self.window.rootViewController = [[UINavigationController alloc] initWithRootViewController:self.mxfirstciewcontroller];
[(UINavigationController *)self.window.rootViewController setNavigationBarHidden:YES];
return YES;
}
In firstViewController.m
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[self.view setFrame:CGRectMake(0, 20, self.view.frame.size.width, self.view.frame.size.height)];
}
In secondViewController.m
- (void)viewDidAppear:(BOOL)animated{
[super viewDidAppear:animated];
[self.view setFrame:CGRectMake(20, 0, self.view.frame.size.width, self.view.frame.size.height)];
}
I added my custom view to the window but it doesn't work. I tried to figure it out but it doesn't work well. (I created this project with the empty project template without using storyboards). This screen is supposed to show the red rectangle towards the bottom right corner of the screen.
I wanted to add my custom view showing red screen to the window, but it just shows the white screen.
AppDelegate.m:
//
// HypnosisterAppDelegate.m
// Hypnosister
//
// Created by TSH on 12/1/13.
// Copyright (c) 2013 TSH. All rights reserved.
//
#import "HypnosisterAppDelegate.h"
#import "HypnosisterViewController.h"
#import "HypnosisView.h"
#implementation HypnosisterAppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
HypnosisterViewController *test = [[HypnosisterViewController alloc] initWithNibName:#"HypnosisterViewController" bundle:nil];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:test];
self.window.rootViewController = nav;
CGRect viewFrame = CGRectMake(16, 24, 10, 15);
HypnosisView *view = [[HypnosisView alloc] initWithFrame:viewFrame];
[view setBackgroundColor:[UIColor redColor]];
[[self window] addSubview:view];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
#end
[edit]
I just messed up the ordering.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
HypnosisterViewController *test = [[HypnosisterViewController alloc] initWithNibName:#"HypnosisterViewController" bundle:nil];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:test];
self.window.rootViewController = nav;
CGRect viewFrame = CGRectMake(160, 240, 100, 150);
HypnosisView *view = [[HypnosisView alloc] initWithFrame:viewFrame];
[view setBackgroundColor:[UIColor redColor]];
[[self window] addSubview:view];
return YES;
}
As you set navigationcontroller as rootviewcontroller so HypnosisterViewController will appear every time no doubts. If you want to add a custom view to have to add as a subview on the HypnosisterViewController.
HypnosisView *view = [[HypnosisView alloc] initWithFrame:viewFrame];
[view setBackgroundColor:[UIColor redColor]];
[test.view addSubview:view];
Hopefully it will work
#toshi You code is correct just you missed the ordering .Use this code it will work.Let me know if it doesn't work.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
HypnosisterViewController *test = [[HypnosisterViewController alloc] initWithNibName:#"HypnosisterViewController" bundle:nil];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:test];
self.window.rootViewController = nav;
[self.window makeKeyAndVisible];
CGRect viewFrame = CGRectMake(16, self.window.frame.size.height - 24, 10, 15);
HypnosisView *view = [[HypnosisView alloc] initWithFrame:viewFrame];
[view setBackgroundColor:[UIColor redColor]];
[[self window] addSubview:view];
self.window.backgroundColor = [UIColor whiteColor];
return YES;
}
There is two points
1- The coordinate of the view in iOS begin from top-left so this frame (16, 24, 10, 15) will in the top-left of the view as frame calculated as (x,y,width,height)
2- Window does not responds to device Orientation. It will be always Portrait. If you rotate your device you will need to re-calculate the view Coordinate.
I'm adding the following code to my application in order to navigate back and forth from a quicklook view.
window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
[self rotateView];
nav = [[UINavigationController alloc] initWithRootViewController:self];
[window addSubview:[nav view]];
[window makeKeyAndVisible];
[[self navigationController] setNavigationBarHidden:YES];
This code is run in my main ViewController viewDidLoad function. My application runs in landscape but this window and navigation bar loads in portrait mode. My application doesn't have a statusBar so some code I've found doesn't work. I get an error if I try to check and listen for status bar orientation notifications.
I'm looking for a way to allow this navigation view to set it's orientation based on the apps current orientation.
If I understand your question Your above code should be placed in didFinishLaunchingWithOptions not in viewDidLoad in the AppDelegate and the initialization of MainViewController should be there also.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
self.mainViewController = //init your MainViewController;
navigationController = [[UINavigationController alloc] initWithRootViewController:(UIViewController*)viewController];
[window addSubview:navigationController.view];
[self.window makeKeyAndVisible];
return YES;
}