适配横竖屏的两种方式

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(statusBarOrientationChange:) name:UIApplicationDidChangeStatusBarOrientationNotification object:nil];   

 - (void)statusBarOrientationChange:(NSNotification *)notification
{

  UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];

 if (orientation == UIDeviceOrientationPortrait || orientation == UIDeviceOrientationPortraitUpsideDown) {
 //翻转为竖屏时
   [self constrainsForPortrait];
   [self drawKline];
   [self drawLine];
   [self drawMA5];
   [self.tableView reloadData];
   }
  if (orientation==UIDeviceOrientationLandscapeLeft || orientation == UIDeviceOrientationLandscapeRight) {
     
     [self constrsinsForLandscape];
     [self drawKline];
     [self drawLine];
     [self drawMA5];
     [self.tableView reloadData];
     //考虑在里面重绘
   }
 }

   - (NSInteger)needDrawKlineCount
 {
     CGFloat width = 0;
   UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
  if (orientation == UIDeviceOrientationPortrait || orientation == UIDeviceOrientationPortraitUpsideDown) {
 
     width = SCREEN_WIDTH-50;
 
   }else{
     width = SCREEN_HEIGHT - 50;
 }
   _needDrawKlineCount = ceil(width/self.rowHeight);
   return _needDrawKlineCount;
 }