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I was recently asked to create an iOS app for a client which controls all other installed apps' access to cellular data. For instance, the user would be able to turn off cellular data access to all apps but Safari.
I assumed that this wouldn't be possible because of sand-boxing but couldn't find any relevant info via Google or the developer's docs, so thought I'd ask the question here - is there a specific class or framework I should investigate?
No you can't , Apple does not allow such approaches . So there is no helping class or framework at all.
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Am I able to use Swift code to display all apps that are currently running on an Iphone (or Ipad)? I am hoping to integrate this with an "on/off" button, but am having trouble getting the display to appear.
No. The lists of installed and running applications are treated as private data, and are not available to applications. Apple has specifically rejected applications for attempting to determine what other applications were installed on a user's phone.
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I want to make Wi-Fi file sharing in my app, that UIViewController will have http address which user will can to write in desktop browser and user will can pass data to application over Wi-Fi. How can I make it? What are any libraries for it? I use Swift 2.0 and Xcode 7. Like this
This is a broad question, here as a broad answer.
You could try using the Multipeer Connectivity Framework that was introduced in iOS7.
This essentially wraps zero-configuration networking so you don't need to worry about IP addresses.
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I am trying to develop an app for iPhone (written in Swift, using CoreBluetooth) which needs to connect to a BLE module (that has to act as a peripheral), and send to this module some data. Unfortunately I cannot do this on my own because of my little knowledge. Can someone indicate me where to find this information? Or, as an alternative, does anybody know how can I do this?
I suggest you, Irrespective of language you are going to use, first understand the Core bluetooth framework . Go through each term . Then you can start with basic functionality like searching the peripherals , connect to the peripherals. Here are some links which can help you:
https://developer.apple.com/library/ios/documentation/CoreBluetooth/Reference/CoreBluetooth_Framework/
and
http://www.raywenderlich.com/52080/introduction-core-bluetooth-building-heart-rate-monitor
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My client have 5-6 ios apps already on App Store,they want us to create a central framework which should merge all existing apps ,and with the help of that framework new apps could be created,this question may sounds dumb ,as i am new to ios development ,i need to know is this really possible in iOS..PLease help.
Evaluate what all the apps have in common. Then try to develop classes, that are used in all of them.
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Is it possible to write an app that cannot be quit through the system tray, without jailbreaking?
No. Apple specifies this behavior is not allowed. It's notoriously difficult to nail down Apple on it's interface specification, but based on what it says about handling multitasking events, it seems unlikely that Apple would tolerate dorking with it's system controls on the subject.