ios中提示框的使用

旧版提示框

UIAlertView *alt=[[UIAlertView alloc]initWithTitle:@"友情提示" message:@"是否是成年人" delegate:self cancelButtonTitle:@"不满足" otherButtonTitles:@"满足", nil];    alt.delegate=self;    [alt show];

UIAlertView获取按钮的点击事件需要使用代理的方式，代理类为：UIAlertViewDelegate。然后实现其方法，即可获取按钮的点击事件。

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{    NSLog(@"%ld",buttonIndex);}

底部提示框

UIActionSheet *sheet=[[UIActionSheet alloc] initWithTitle:@"请选择城市" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"北京" otherButtonTitles:@"上海", nil];    [sheet showInView:self.view];

与上述提示框类似，代理为：UIActionSheetDelegate，点击的代理方法如下：

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{}

新版提示框

UIAlertController *controller=[UIAlertController alertControllerWithTitle:@"友情提示" message:@"是否购买" preferredStyle:UIAlertControllerStyleAlert];UIAlertAction *act1=[UIAlertAction actionWithTitle:@"买" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {    }];UIAlertAction *act2=[UIAlertAction actionWithTitle:@"不买" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {    }];    [controller addAction:act1];    [controller addAction:act2];    [self presentViewController:controller animated:YES completion:^{    }];

此提示框需要使用控件触发弹出。

新版ActionSheet

UIAlertController *controller=[UIAlertController alertControllerWithTitle:@"选择" message:@"请选择" preferredStyle:UIAlertControllerStyleActionSheet];    UIAlertAction *act1=[UIAlertAction actionWithTitle:@"买" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {    }];    UIAlertAction *act2=[UIAlertAction actionWithTitle:@"不买" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {    }];    [controller addAction:act1];    [controller addAction:act2];    [self presentViewController:controller animated:YES completion:^{    }];

取消提示框

[self dismissViewControllerAnimated:YES completion:^{    }];