self.edgesForExtendedLayout = UIRectEdgeAll;

self.automaticallyAdjustsScrollViewInsets=NO;

/**

- (void)automaticallyAdjustsScrollViewInsets{

if ([[[UIDevice currentDevice] systemVersion] floatValue] > 6.9) {

[super setAutomaticallyAdjustsScrollViewInsets:flag];

}

*/