This is a classic: an app stops working correctly, so you hit the home button and open the app again thinking: “I restarted the app but this didn’t fix the problem”… But the truth is that iOS on iPhone, iPad and iPod Touch handles multiple apps running at the same time (multitasking) by saving the… →
iPhone OS 4, multitasking experience without drawbacks
Apple’s Senior Vice President of iPhone software Scott Forstall explained how the company was able to add multitasking while preserving battery life and avoiding major slow downs: iPhone 4 will add seven different multitasking services APIs for developers, each tuned to solve different multitasking scenarios.