iPhone应用程序背景NSTimer（定期轮询数据）

Question

I need to get data in background from server at regular interval, Nstimer seems don't work in background.

Do i need to edit the plist for Void or audio to make NStimer work in background ? Would any one explain the process we sample code.

Regards, Avinash

Answer 1

Check out this method:

[NSThread detachNewThreadSelector: toTarget: withObject:]

Example usage:

 -(void) pollBackground
 {
     @autoreleasepool {

          // every five seconds, update list
          NSTimeInterval interval = 5; 

          while (poll)
          {
              // update from server

              [NSThread sleepForTimeInterval:interval];
          } 

     }
 }

 -(void) viewDidLoad {
     [NSThread detachNewThreadSelector:@selector(pollBackground) toTarget:self withObject:nil];
 }

This should keep running in the background.