I need to send video output to an external video screen from my iphone app. I am using the Apple Composite AV Cable. I get video output when I am playing a video through the ipod app, but when I do
[[UIScreen screens] count];
I only get one screen, the main phone screen. For my app I need to have a completely separate window like the process here:
Support for External Displays and Projectors
An iPad can now be connected to an external display through a supported cable. Applications can use this connection to present content in addition to the content on the device’s main screen. Depending on the cable, you can output content at up to a 720p (1280 x 720) resolution. A resolution of 1024 by 768 resolution may also be available if you prefer to use that aspect ratio.
To display content on an external display, do the following:
Use the screens class method of the UIScreen class to determine if an external display is available.
If an external screen is available, get the screen object and look at the values in its availableModes property. This property contains the configurations supported by the screen.
Select the UIScreenMode object corresponding to the desired resolution and assign it to the currentMode property of the screen object.
reate a new window object (UIWindow) to display your content.
Create a new window object (UIWindow) to display your content.
Assign the screen object to the screen property of your new window.
Configure the window (by adding views or setting up your OpenGL ES rendering context).
Show the window.
All that is here in a more readable format. I am working on an iphone, not an ipad, but the documentation says that external screens are now supported for iphones in ios4.
How can I get the phone to realize there is another screen attached? thanks
For posterity,
my problem was that I was using an iPhone 3GS. The ios4 video out stuff needs an iPhone 4 (it also works in 3.2 for the ipad i hear). With an iphone 4 I was able to get composite video out.
[[UIApplication sharedApplication] performSelector: #selector(startTVOut) withObject:nil afterDelay:.1]
Related
Simply that. I'm working on an iPhone (iOS) game that loads without using .xib files. Window and view is created programmatically. It automatically detects resolution and retina display and adjusts accordingly.
However when run on and iPad (only have the simulator for iPad), it shows up in a mini window that same size as the iPhone resolution, with a little 2x button in the bottom-right corner. I want it to load fullscreen with full resolution (larger res than the phone). Everything will scale accordingly so it would look the same as on the phone, and look just as crisp.
Why does this happen? Why doesn't the window automatically take up the fullscreen like it does on iPhone?
After much searching, I've found this template: https://github.com/ryanscott/rcloudlib/blob/master/Samples/clean_universal_app_template.zip
which loads properly for me on both iPhone and iPad.
Looking at the code, however, it does nothing differant than what I am doing. All it does is check which device is being used, and loads the appropriate app delegate, which in this case contain the exact same code, albeit for background color. This is clearly aimed towards those who want to have a different view load on iPhone vs. iPad, while avoiding using nibs. I want the SAME view across all devices, so I have no need to use multiple delegates or the like.
How can I force the app delegate to use the fullscreen regardless of device?
In your Xcode project file, find your target, go to the Summary tab and make sure that Devices is set to Universal under iOS Application Target
Yup! In Xcode 6 the "Devices" option is now called "Deployment Target" and is located here:
I've seen tons of questions and answers regarding merging an iPhone and an iPad app into an universal app, but that isn't what I want to do. What I am going to do is use in app purchase to unlock an iPad interface and then display the correct interface using conditionals. If the interface is purchased, the app displays the iPad Nib, and if not, it just displays the same way as an iPhone application does (with the option to scale the app, etc). The conditionals are very simple and I have already implemented them, however the issue I run into is this: If the IAP is NOT purchased, the iPad displays the iPhone Nib, but not in the typical way. It is just in the corner with no option to scale it, rather than in the center with the black border that you usually see. Does anyone know how I can set it up so i fixes this issue? I'm a little stumped to be honest.
The Info.plist file in an iOS app contains a key, UIDeviceFamily, which lists the devices that the app natively supports. If the key's value is 1, or a array containing 1, the app natively supports iPhones and iPods Touch. If the value is 2, or a array containing 2, the app natively supports iPads.
If UIDeviceFamily says the app supports iPads, then it will run the app in native iPad mode, not in iPhone-wrapper mode.
The Info.plist file is part of your app bundle, and you can't modify files in the app bundle.
So there is no way to enable or disable the system's native-iPad support at runtime. You'll have to move your app's top-level view into a wrapper view that centers and scales its child, and use that wrapper view as the UIWindow's subview.
UIDeviceFamily in the Information Property List Key Reference
This isn't possible, unfortunately. The iPad will know that the app is iPad ready and will tell draw the screen at full size. Even if you showed iPhone xib file on the iPad, they would still be scaled to fit the full screen using the UIViewAutoresizingMask params you've set for them.
One thought would be to force the size of your UIWindow to be iPhone sized (remember to account for retina) and centered, but I'm not 100% sure how/if this would work. You may have to change each UIView frame. I'm not sure.
I've seen tons of questions and answers regarding merging an iPhone and an iPad app into an universal app, but that isn't what I want to do. What I am going to do is use in app purchase to unlock an iPad interface and then display the correct interface using conditionals. If the interface is purchased, the app displays the iPad Nib, and if not, it just displays the same way as an iPhone application does (with the option to scale the app, etc). The conditionals are very simple and I have already implemented them, however the issue I run into is this: If the IAP is NOT purchased, the iPad displays the iPhone Nib, but not in the typical way. It is just in the corner with no option to scale it, rather than in the center with the black border that you usually see. Does anyone know how I can set it up so i fixes this issue? I'm a little stumped to be honest.
The Info.plist file in an iOS app contains a key, UIDeviceFamily, which lists the devices that the app natively supports. If the key's value is 1, or a array containing 1, the app natively supports iPhones and iPods Touch. If the value is 2, or a array containing 2, the app natively supports iPads.
If UIDeviceFamily says the app supports iPads, then it will run the app in native iPad mode, not in iPhone-wrapper mode.
The Info.plist file is part of your app bundle, and you can't modify files in the app bundle.
So there is no way to enable or disable the system's native-iPad support at runtime. You'll have to move your app's top-level view into a wrapper view that centers and scales its child, and use that wrapper view as the UIWindow's subview.
UIDeviceFamily in the Information Property List Key Reference
This isn't possible, unfortunately. The iPad will know that the app is iPad ready and will tell draw the screen at full size. Even if you showed iPhone xib file on the iPad, they would still be scaled to fit the full screen using the UIViewAutoresizingMask params you've set for them.
One thought would be to force the size of your UIWindow to be iPhone sized (remember to account for retina) and centered, but I'm not 100% sure how/if this would work. You may have to change each UIView frame. I'm not sure.
I have developed a straight iPhone/iPod Touch app.
A launch image is implemented for Retina displays as well as the lower resolution of the former generation devices.
Those images are displayed properly on the iPhone simulator as well as on several iPhone an iPod Touch devices.
However, since some days, when launched on an iPad (1) or iPad simulator one of the other images within the app is shown.
Apparently the image that is displayed wrongly, is one of two amongst ca. 70 images within the app. Those two images happen to be either
1. the first image in my xcode project groups hierarchy.
-or-
2. the first image in my project in alphabetical order.
I did not yet find a pattern of when 1. or 2. happens, so when the first image in the project's hierarchy of groups is taken or when the first in alphabetical order is taken. But it seems to be one of these two files only.
Any idea what I probably did wrong so that a wrong image is picked as launch image of this iPhone-only app whenever it is launched on an iPad?
Thanks in advance.
Cheers
Hermann
Try inserting an image named Default.png into Xcode. That's all, just drag it in. Xcode recognizes any picture named Default.png as the loading image. That should make it work.
To expand a little on Jack's answer - you can indeed use an image named Default.png which will automatically be used as a launch image for your app.
However,you can also customise the launch image for particular hardware and device orientations by using images of a particular size and name - for example, a 768x1004 pixel image named Default-Portrait~ipad.png added to your project will be automatically used as the launch image when you launch the app on an iPad in portrait orientation.
The use of these customised images is highly recommended, as it allows the launch image to be sized appropriately for the different shapes of screen (i.e. iPhone and iPad), and allows high resolution launch images to be used on Retina display devices.
For a list of these sizes and image names, see this page. The items of interest are the ones beginning with "Default"
All iPhone apps have a splash screen, or what Apple refers to as a “launch image”. It is the screen that is displayed immediately after you press your app’s icon on the home screen, while the app icons are sweeping away and your app is zooming into view.
Some apps opt not to display a splash screen and go for a black screen, which is the default behaviour when you create an app. Others display a wireframe of the app’s interface in order to look like it is loading faster. See Apple’s native apps such as Clock and Camera for good examples of this. The most common use of the splash screen (especially in games) is to present a company or game logo, as we do in Addicus:
Apple has made it so easy to set your splash screen that you don’t even need a single line of code to do it. Why, you don’t even need to change a setting. Here’s how to set your splash screen it in just 2 steps:
Add a file to your project’s Resource folder called Default.png.
There is no step 2. Take this time to reflect on how good life is.
And that’s it. Run your app and your splash screen will zoom into glorious view.
A couple of things to watch out for when working with splash screens:
Whatever image you give it will be scaled to fill the 320×480 resolution of the iPhone, so ideally you would use a 320×480-sized image.
If your iPhone app is running in landscape mode, you need to rotate the splash screen you use. For example, our splash screen is rotated 90 degrees to the right in the above image.
See more at: http://getsetgames.com/tag/launch-image/#sthash.GEXwuzsf.dpuf
I'm currently developing an app that has a camera functionality, with a custom camera screen, featuring a preview screen and an overlay.
I'm using the AVFoundation classes and methods as per the eradication of UIScreenCapture.
The problem I have is that the preview data I get from AVCaptureSession is too zoomed in. If i take a picture with that screen, and another with the iPhone's default camera app, without moving the iPhone, the difference in zoom is far too much.
I need the zoom of my app to be the same as is default for iPhone camera app.
I've tried changing the AVCaptureVideoPreviewLayer.videoGravity, to any of it's 3 possible values, to no avail.
Please, any leads on this problem are truly appreciated.
Arcantos' solution was mostly correct. That will work assuming you're on an iPhone 3G (or any device with a camera that supports 640x480). An iPhone 4 may run into some issues there.
A more correct way would be to test for the availability of and apply this preset:
captureSession.sessionPreset = AVCaptureSessionPresetPhoto;
This will use the raw camera data, regardless of the native resolution.
Turned out to be a resolution issue.
It was fixed by using
myCaptureSession.sessionPreset = AVCaptureSessionPreset640x480
Note that iPhone 3g does not support that, so you have to ask wheter the device supports it
[[AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo] supportsAvCaptureSessionPreset:AVCaptureSessionPreset640x480]
Is the aspect ratio of your preview pane identical to that of the camera capture data? If not, the OS may be changing the zoom to fit the data rect into your requested aspect ratio.