I am trying to apply Mike Chen's answer here, using SDK 3.0. In delegate.m file I implement;
[viewController.view addSubview:[[objc_getClass("PLCameraController") sharedInstance] previewView]];
and in viewcontroller.m I implement:
PLCameraController *cam = [objc_getClass("PLCameraController") sharedInstance];
CapturedImage = [cam _createPreviewImage];
but 'cam' is always nil. Any suggestions?
This won't work when running in the simulator or on an iPod Touch. Are you running this on a physical iPhone with a camera?
Also, if you've dumped the headers correctly, you shouldn't be using the objc_ runtime functions, but rather using the class names. Is the result of objc_getClass("PLCameraController") set to nil?
On a side note: I hope you're not looking to publish your application through the App Store because this sort of private method calling is a great excuse for Apple to reject your application.
To use PLCameraController, you'll need to include the PhotoLibray private framework. The simplest way to do that is drag drop an Image Picker Controller (UIImagePickerController) into your main nib.
Related
I am working on universal ios app which runs on iPhone, iPad and iPod-touch. I have
implemented the code for annotation and on selecting this annotation a callout would be
raised. It works fine for iPhone but didSelectAnnotationView method not called for iPad.
Should i add any additional to work for iPad? Thanks in advance
In your code i think you just forget to set Delegate in checking of device if else condition. please check Properly. if didSelectAnnotationView called in iphone but not in ipad it means for ipad condition you not set mapView.delegate = self; for ipad Condition.
So please check properly and set its delegate if your code working for iPhone so that probability for your issue.
see if adding this helps. [annotationView setCanShowCallout:NO]
I have an app which uses a manager to offer up the relevant custom view for a selected item when selected.
The selection is done through one of 3 parent custom views
TableView
PageControl
Gallery (essentially another TableView)
One of the custom views displays a view with an embedded MPMovieControl on it.
This works fine however for some reason in the Gallery view if I have set the controlStyle of the video set to MPControlStyleNone the app crashes, well it locks up the simulator and Xcodes debugger doesnt even notice, just assumes its still running.
This line is the culprit
player.controlStyle = MPMovieControlStyleNone;
Without it, it works fine, but then I obviously have the unrequired controls displayed
iOS 2.0 through iOS 3.1 uses movieControlMode. Everything newer uses controlStyle. Test for newer and fall back to older.
if ([movie respondsToSelector:#selector(setControlStyle:)]) {
movie.controlStyle = MPMovieControlStyleNone;
} else {
movie.movieControlMode = MPMovieControlModeHidden;
}
May be this will work.
[player setControlStyle:MPMovieControlStyleNone];
Run the program using the profiler and check for NSZombies. Most likely the app is crashing due to a wrong release count or an autorelease and the symptom is your movie crashing when it might be something related to you starting the movie and needing it later to find it was released.
Issue summary
Changing the orientation of an iPad device or simulator while playing a video using MPMoviePlayerViewController results in an inconsistent rotation state upon dismissal of the video player. This is a known bug in iPad SDK 3.2, documented at http://www.openradar.me/8012810
Sample project
I have prepared a minimal sample project using the View-based Application template from Xcode 3.2.2, using the following code to launch the player
NSURL *movieUrl = [NSURL URLWithString:#"http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8"];
MPMoviePlayerViewController *player = [[MPMoviePlayerViewController alloc] initWithContentURL:movieUrl];
[self presentMoviePlayerViewControllerAnimated:player];
[player release];
The code is available on GitHub at http://github.com/adamalex/FullScreenMovie or direct download using http://github.com/adamalex/FullScreenMovie/zipball/master
Steps to reproduce
Obtain the project using the information above
Launch the project with the iPad simulator or device
Tap the button to begin playing the video
Rotate the iPad by 90 degrees
Dismiss the video
Note the UIStatusBar is out of sync with the application UI
Objective
I have contacted Apple and they have confirmed this is a bug that is being investigated. I would like to discuss temporary workarounds that use public APIs safe for submission to the App Store. I am going to open a developer support case with Apple as well and will report back with my own progress.
Successful response from Apple Developer Technical Support!
This is a known bug and a we're received a number of duplicate bug reports and so iOS engineering is aware of the issue and we do have a temporary workaround as suggested by iOS engineering.
You will need to implement this in the view controller which presents the movie player.
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {
[super didRotateFromInterfaceOrientation:fromInterfaceOrientation];
[self performSelector:#selector(fixStatusBar) withObject:nil afterDelay:0];
}
- (void)fixStatusBar {
[[UIApplication sharedApplication] setStatusBarOrientation:[self interfaceOrientation] animated:NO];
}
While this is somewhat ugly, it should fix the issue for now. It would be recommended to remove this code once the bug is fixed in the system.
This took care of the issue completely for me, and you can revisit http://github.com/adamalex/FullScreenMovie for the code with the fix applied.
This also solves an iPhone/iPodTouch rotation issue that I was struggling with. I am developing a universal app in which each view displays a different image depending on whether the device is in portrait or landscape orientation. Buttons are used to navigate between views.
If the app is running on the device and a portrait view is rotated to landscape, my image switching takes place. If the device is then placed flat on a table top and the button is tapped to display the next view, the view appears in landscape but shows the portrait image instead. I solved the problem by forcing a portrait view to appear by detecting for face up and down, but Apple's code solved this problem (as well as the similar movie problem I was also experiencing).
Many thanks for reporting the bug - I assumed it was just my bad coding...
I am trying to apply Mike Chen's answer here, using SDK 3.0. In delegate.m file I implement;
[viewController.view addSubview:[[objc_getClass("PLCameraController") sharedInstance] previewView]];
and in viewcontroller.m I implement:
CapturedImage = [[objc_getClass("PLCameraController") sharedInstance] _createPreviewImage];
but CapturedImage is always nil. Any suggestions?
Things to check:
(1) Has PLCameraController been updated for iPhone 3.x? This blog post suggest it has not.
(2) Instead of nesting all your calls Smalltalk style break them apart so you can see if your getting the objects you think you are:
WhateverClass *cameraController=[objc_getClass("PLCameraController") sharedInstance];
if (cameraController!=nil) {
ImageClass *myImage=[cameraController _createPreviewImage];
}else {
NSLog(#"camerController is nil");
}
Just remember that PLCameraController is a private framework that relies on a hidden Apple API. Even if you get it work, you most likely won't get it passed the App store review.
I'm having a problem with applicationShouldTerminate.
What ever I do it seams that has no effect. Any help would be
appreciated.
I'm well versed in programing but this just gives me headache. Im going
over some basic tutorials for xcode , as I'm new to mac in general, and am currently looking at a simple flashlight app.
It exists but I would like to add a alert box here with option not to
quit.
(void)applicationWillTerminate:(UIApplication *)application
{
[application setIdleTimerDisabled:NO];
}
this has no effect, alert is closed even before its created.
(void)applicationWillTerminate:(UIApplication *)application
{
[application setIdleTimerDisabled:NO];
UIAlertView *alertTest = [[UIAlertView alloc]
initWithTitle:#"This is a Test"
message:#"This is the message contained
with a UIAlertView"
delegate:self
cancelButtonTitle:#"Button #1"
otherButtonTitles:nil];
[alertTest addButtonWithTitle:#"Button #2"];
[alertTest show];
[alertTest autorelease];
NSLog(#"Termination");
}
I did some reading online and found that it should be possible to do
this with
(NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication*)sender
But no mater where I put that declaration I get error: syntax error
before NSApplicationTerminateReply.
There is no syntax error except that xcode seems not to recognize
NSApplicationTerminateReply as valid input.
Any sample code would be greatly appreciated.
I know this is a non-answer, but hopefully I can be helpful:
Displaying a "Really quit?"-type alert like this, even if you can pull it off technically (and I'm not sure you can), is a bad idea and is likely to either cause rejection from the App Store or, at best, an inconsistent user experience because no other apps do this.
The convention with iPhone apps is to save state if necessary, then yield control (for termination) as quickly as possible when the user hits the home button or switches apps.
To ensure a consistent experience, Apple probably has an aggressive timer in place to restrict what you can do in applicationWillTerminate. And even if they don't have a technical measure in place, they probably have an App Store approval policy to ensure that applications quit immediately when they're asked to.
applicationShouldTerminate and NSApplication do not exist on the iPhone. You have to use UIApplication.
The alert view is never shown because the 'show' method does not block, and therefore, the end of 'applicationWillTerminate' is reached immediately after you create the alert view and try to show it. I believe this is by design. You can't really begin asynchronous operations in 'applicationWillTerminate'.
With regards to the applicationShouldTerminate error, in case anyone's curious, NSApplicationTerminateReply and NSApplication seem to be deprecated...even though the OP's method is exactly how it appears in the docs!
Defining your method as the below should build with no errors:
-(BOOL)applicationShouldTerminate :(UIApplication *)application
I think I found the answer to what I wanted to do but will need to check it when I get back home.
Some directions were found here
http://blog.minus-zero.org/
The iPhone 2.0 software was recently released, and with it came the
ability for users to download native apps (i.e., not web sites)
directly to their phones from within the iPhone UI or via iTunes.
Developers (anyone who pays Apple 59GBP for the privilege) can then
write their own apps and have them available for purchase in the App
Store.
One limitation of the Apple-sanctioned SDK is that only one
application is allowed to be running at a time. This presents a
problem for apps such as IM clients, music players and other programs
whose functionality relies on being able to run in the background.
Another example (courtesy of James) would be an app that takes
advantage of the iPhone 3G's GPS chip to create a log of all the
places you visit.
However, there is a neat trick that I discovered: your app will only
get terminated if you switch away from it, and hitting the iPhone's
power button while your app is in the foreground doesn't count as
switching away. The upshot of this is you can create apps which
continue to run while the iPhone is in your pocket - perfect for the
GPS example.
Achieving this is as simple as implementing two methods in your
UIApplication delegate - applicationWillResignActive: and
applicationDidBecomeActive:. Here's a simple example to demonstrate
the effect.
In your UIApplication delegate header file, add a new ivar: BOOL
activeApp. Then, in your implementation, add the following three
methods:
- (void)applicationWillResignActive:(UIApplication *)application {
NSLog(#"resigning active status...");
activeApp = NO;
[self performSelector:#selector(sayHello) withObject:nil afterDelay:1.0];
}
- (void)applicationDidBecomeActive:(UIApplication *)application {
NSLog(#"becoming the active app...");
activeApp = YES;
}
- (void)sayHello {
NSLog(#"Hello!");
if (!activeApp)
[self performSelector:#selector(sayHello) withObject:nil afterDelay:1.0];
}