新手请问，怎么让下面的代码延迟10秒再执行

新手请教，如何让下面的代码延迟10秒再执行？
- (void)viewWillAppear:(BOOL)animated 
{  
  CGPoint newPos = simpleLayer_.position;
  newPos.y += 1.;
  simpleLayer_.position = newPos;  
  [simpleLayer_ setNeedsDisplay];  
 
 }

[解决办法]

C/C++ code

- (void)viewWillAppear:(BOOL)animated  {   [self performSelector:@selector(initContentView) withObject:nil afterDelay:10];  }－(void)initContentView{  CGPoint newPos = simpleLayer_.position;  newPos.y += 1.;  simpleLayer_.position = newPos;     [simpleLayer_ setNeedsDisplay];   }