IOS屏幕自动旋转，强制横竖屏方法：
- (BOOL)shouldAutorotate
{
return YES;
} - (NSUInteger)supportedInterfaceOrientations
{
return (UIInterfaceOrientationMaskAll);// 修改这里 控制显示方向
} - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}