如何在UIAlertController中添加button在IOS 9中
我们如何在iOS 9中使用UIAlertView以及如何在UIAlertController添加button
UIAlertController * alert=[UIAlertController alertControllerWithTitle:@"Title" message:@"Message"preferredStyle:UIAlertControllerStyleAlert]; UIAlertAction* yesButton = [UIAlertAction actionWithTitle:@"Yes, please" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) { **//What we write here????????** }]; UIAlertAction* noButton = [UIAlertAction actionWithTitle:@"No, thanks" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) { **//What we write here????????** }]; [alert addAction:yesButton]; [alert addAction:noButton]; [self presentViewController:alert animated:YES completion:nil];
UIAlertController * alert=[UIAlertController alertControllerWithTitle:@"Title" message:@"Message" preferredStyle:UIAlertControllerStyleAlert]; UIAlertAction* yesButton = [UIAlertAction actionWithTitle:@"Yes, please" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) { /** What we write here???????? **/ NSLog(@"you pressed Yes, please button"); // call method whatever u need }]; UIAlertAction* noButton = [UIAlertAction actionWithTitle:@"No, thanks" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) { /** What we write here???????? **/ NSLog(@"you pressed No, thanks button"); // call method whatever u need }]; [alert addAction:yesButton]; [alert addAction:noButton]; [self presentViewController:alert animated:YES completion:nil];
迅速
let alert = UIAlertController(title: "Title", message: "Message", preferredStyle: .alert) let yesButton = UIAlertAction(title: "Yes, please", style: .default, handler: {(_ action: UIAlertAction) -> Void in /** What we write here???????? **/ print("you pressed Yes, please button") // call method whatever u need }) let noButton = UIAlertAction(title: "No, thanks", style: .default, handler: {(_ action: UIAlertAction) -> Void in /** What we write here???????? **/ print("you pressed No, thanks button") // call method whatever u need }) alert.addAction(yesButton) alert.addAction(noButton) present(alert, animated: true) { _ in }
您确实需要在确定后编写代码，并在各自的完成块中按下取消button。
UIAlertController * alert=[UIAlertController alertControllerWithTitle:@"Title" message:@"Message"preferredStyle:UIAlertControllerStyleAlert]; UIAlertAction* yesButton = [UIAlertAction actionWithTitle:@"Yes, please" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) { [self okButtonPressed]; }]; UIAlertAction* noButton = [UIAlertAction actionWithTitle:@"No, thanks" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) { [self cancelButtonPressed]; }]; [alert addAction:yesButton]; [alert addAction:noButton]; [self presentViewController:alert animated:YES completion:nil]; - (void)cancelButtonPressed{ // write your implementation for cancel button here. } - (void)okButtonPressed{ //write your implementation for ok button here }
如果在点击button之后不需要任何其他操作，则可以将这些块保留nil ：
UIAlertAction* yesButton = [UIAlertAction actionWithTitle:@"Yes, please" style:UIAlertActionStyleDefault handler:nil];