I have an application in which I want to lock the iPhone programmatically so that the user can't perform any action.
How can I determine the user is not working with the iPhone for some period, and after that period automatically lock the phone?
Such applications are used in all phone devices, where the user can set an auto-lock time and then the device will automatically lock if the user does not handle the device.
How is it done programmatically? Please give me one example of the code so I can perform this easily.
I am new to iPhone programming, and I am struggling in my application. Help me. Thanks in advance.
(For your lock the iphone device through programatic only )
Impossible.
But , you could prevent your phone from locking when your app is running.
[UIApplication sharedApplication].idleTimerDisabled = YES
There is no way to disable the Home Button in iOS using the documented API. The user will always be able to get back to the home screen or close your application using the Home Button.
Even if you find a way do it (which is very unlikely) your app will be definitely rejected from the App Store for a blatant violation of the iOS Human Interface Guidelines. If I were you I would reconsider implementing this behaviour, frankly, it's just not a good idea.
If you're only looking for blocking the the UI of your app, check out the answers to this question, more specifically, check out the incredibly useful MBProgressHUD library:
Related
I want to execute code on background, when user clicks on app icon? Is it possible? I want to turn bluetooth when I click on app icon on Iphone. Thanks a lot !
As per this answer, there is no way to turn on Bluetooth without Apple rejecting your app. Therefore, the best way to have the user turn on Bluetooth is to tell the user to do so(e.g. through an alert/popup).
As for executing code in the background, check out this answer, which describes how threading works in Swift.
Might be i am using a wrong title but i will try to explain here what i want.
In iOS i need to implement a functionality to get notify if the user is using their iOS device.
My app will be running in background using location services and i need to find out if the the user is using their device. It is doable as i have looked into this application which is sending notifications in background to the drivers who is suing their devices while driving.
https://itunes.apple.com/fr/app/cellcontrol/id661169580?l=en&mt=8&ign-mpt=uo=2
So i need similar kind of functionality to find out if a user is using iOS device or not. If anyone of you can suggest me any approach then it would be great for me to start.
Thank you!
Note: I have tried to find out touch events in background but that is not possible as i have done some research on this.
You won't be able to receive touch events when the app is in background using public API's. However, you can do that with the help of mobileSubstrate library ( http://iphonedevwiki.net/index.php/MobileSubstrate - The MobileHooker component is the one that would be used). by hooking your process to the OS. As an example, the display recorder app in Cydia tracks global gestures while recording the screen. This will be a cydia tweak and you will need to jailbreak your device to do all that.
Coming to your specific use-case, the example app you cited should be using one of the exceptions for background applications mentioned in https://developer.apple.com/library/ios/documentation/iphone/conceptual/iphoneosprogrammingguide/ManagingYourApplicationsFlow/ManagingYourApplicationsFlow.html (see the section - "Implementing Long-Running Background Tasks"), probably the one to receive updates from external accessories.
My app has to run for a long time (also) in the background, due to Location Services.
When a certain condition is met the app has to move to the foreground.
I was able to run my app in the background and bring it to the front manually.
Reading up on this issue I got confused on how to move my app to the foreground by code.
It has to be in an if statement but what to do from here?
No do not think this is possible. You will be able to spawn a UILocalNotification to show application state to the user, but it is my understanding that iOS prevents you from making your app take focus.
you can't do that without user interaction. You can present a UILocalNotification
-- you can't even be sure iOS leaves it running though!
on a jailbroken phone I guess it is possible
This is clearly not possible, as it would be a mess if any app could just take over control at any point in time. As mentioned, you have to post a notification, and then it is up to the user if he or she wants to launch the app. If you notification states a good reason why they should launch your app, they might very well do it :-) And remember, don't mix up the user's needs with your/your app's needs.
Is there a way to close the iPhone app from within the app? A client asked me if there was a way to close the app by pushing a button in the app, without manually doing it by double tapping the home button and then press-hold the app icon and then hit the - sign.
Apparently, the client wants to build an app which uses bluetooth and ANT+ devices which are battery hogs and wants the ability to quickly close the app.
Any thoughts?
I'm thinking you should just make the button dispose of the Bluetooth and other 'battery hogs'. You might even make the app smart enough to turn it off based on certain events like when the user leaves the app or when a certain function is completed.
Aside from quitting from a button within the application being against the Apple Human Interface Guidelines, it isn't even recommended behaviour.
But if you still want to close your app. Use 'exit();'.
This behavior is against Apple's Human Interface Guidelines. If you still want to do so, use the C function exit();. But for the user this will look like the application crashed, so I wouldn't do so, even not on an non-AppStore app!
My question is similar to this thread
which says to lock the iPhone in portrait mode and doesnot allow it to go to landscape mode.
This can be done easily but my concern is I want to lock all the applications running to the portrait mode in iOS 4.
That is if I have locked the orientation mode and has minimised my application then the none of the application in iPhone shall go to landscape mode.
So my question is
Is it possible
if yes then how? Any ideas or link will be really appreciated.
Edit: I know this is already available in iOs 4.0 but its hard to find also this is just for information purpose.
For those who disagree: check out the link
Thanks in advance...
Edit: Finally as per everyones suggestion I think it is not at all possible to lock other applications orientation through our application.
How would you feel if any 3rd application is accesing the orientation of your application and that of device.
So Its all handled out by Apple itself. Also as told no application is allowed to effect the system variable..
So in case you succeed in finding out the hack for this thing... Then also your application is gonna rejected by apple...
Still all the best for ur research :P
Sorry, but you can't lock the orientation via public APIs, and if you are going to use private APIs, Apple will never approve your app.
An iPhone app cant affect system wide variables such as screen lock. If you could, then there would be nothing keeping you from accessing all the other data on the device as well. Sorry, but if you want your app approved by Apple, you'll have to give up on this feature.