TSModalViewController自定义模态视图控制器隐藏逻辑

TSModalViewController自定义模态视图控制器，在呈现的视图之外点击时隐藏（在FormSheet中呈现）。\

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用法：\

// 让你的 ViewController 继承自 TSModalViewController\

#import \"TSModalViewController.h\"\

@interface ToShowModalViewController : TSModalViewController @end\

\

• (IBAction)didClickedGoButton:(id)sender {\

  ToShowModalViewController *viewController = [[ToShowModalViewController alloc] init];\

  viewController.modalPresentationStyle = UIModalPresentationFormSheet;\

  [self presentViewController:viewController animated:YES completion:nil];\

}