multitasking

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Download data in background with iOS4

As per the latest update of Kindle V2.5, it has support of \"continue downloading books while the app is in the background on iOS 4 devices\".[详细]

2023-02-04 06:02 分类：问答
How to regularly check for RSS/email-like updates online with iOS4

Is it possible to have an App (running iOS4 on hardware supporting multi-tasking) which starts on iPhone startup and then regularly checks for online updates (every 15 minutes) and then refresh the ba[详细]

2023-02-04 01:14 分类：问答
How to run multiple external commands in the background in ruby

Given this Unix shell script: test.sh: #!/bin/sh sleep 2 & sleep 5 & sleep 1 & wait time ./test.sh[详细]

2023-02-04 00:26 分类：问答
How to use multitasking for iOS application?

Really confused about mu开发者_如何学Goltitasking API in iOS, such as beginBackgroundTaskWithExpirationHandler etc.[详细]

2023-02-03 21:14 分类：问答
Why does my indefinite UIView animation stop when my application goes to the background?

I am using the following code for animating a UIView indefinitely: #define DEFAULT_ANIM_SPPED 0.6 #define INFINATE_VALUE 1e100f[详细]

2023-02-03 16:02 分类：问答
Disabling multitasking on iPhone 3GS using UIApplicationExitsOnSuspend not working

I am developing an iPhone app where I don’t want/need the multitasking capability and I want my app to initiate every time I open it.[详细]

2023-02-03 14:54 分类：问答
How can I buy time to fully dismiss a UIAlertView when entering background?

I pop up a UIAlertView to ask the user if they really want to open a URL. If开发者_开发知识库 they choose \"Yes\" my app immediately opens the URL and is sent to the background. When the user reopens[详细]

2023-02-03 11:55 分类：问答
iOS 4 periodic location updates using GPS while app is in background

Is it possible to have the phone power up the GPS every say 30 minutes and get the user\'s location while the app is in a background state?[详细]

2023-02-01 15:27 分类：问答
How to implement Task completion

Task completion — applications can ask the system for extra time to complete a given task. I am using this method for Task Completion,[详细]

2023-01-30 16:06 分类：问答
"failed to resume in time" on resumption from background crash

ok so on going to background I hide everything.I still get a failed to resume in time error when I switch back.Why is it crashing in drawRect if everything is hidden?Any ideas on how to deal with a \"[详细]

2023-01-30 05:16 分类：问答