如下代码,
UIAlertView *alertView=[[UIAlertView alloc]initWithTitle:@"提示" message:@"恭喜你答对了" delegate:nil cancelButtonTitle:@"点击取消" otherButtonTitles:nil];
[alertView show];
会提示:
把代码修改成:
UIAlertController *aleView=[UIAlertController alertControllerWithTitle:@"提示" message:@"恭喜你答对了" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *cancel=[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];
[aleView addAction:cancel];
[self presentViewController:aleView animated:YES completion:nil];
报错消失:
运行后效果如图