iOS8中的UIActionSheet添加UIDatePicker后，UIDatePicker不显示问题

解决方法：

 

IOS8以前：

UIActionSheet* startsheet = [[UIActionSheet alloc] initWithTitle:title

delegate:self

cancelButtonTitle:@"确定"

destructiveButtonTitle:nil

otherButtonTitles:nil,

nil];

startsheet.tag = 333;

[startsheet addSubview:datePicker];

[startsheet showInView:self.view];

IOS8以后：

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:title message:nilpreferredStyle:UIAlertControllerStyleAlert];

UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"确定"style:UIAlertActionStyleCancel handler:^(UIAlertAction *action)

{

////todo

}];

[alertController.view addSubview:datePicker];

[alertController addAction:cancelAction];

[self presentViewController:alertController animated:YES completion:nil];