UIAlertController 添加 UITextField

来源：互联网发布：c语言送给女友代码编辑：程序博客网时间：2024/05/04 13:40
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- (void)addAlertView {         UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"拒绝订单" message:@"" preferredStyle:UIAlertControllerStyleAlert];    //    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];//    [alertController addAction:cancelAction];        [alertController addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {        NSLog(@"点击取消");    }]];        UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {                UITextField *tf = alertController.textFields.firstObject;        NSLog(@"hahah : %@",tf.text);                [self teacherRejectWithType:@"0" reason:tf.text];                [[NSNotificationCenter defaultCenter] removeObserver:self name:UITextFieldTextDidChangeNotification object:nil];    }];    // 在输入文字前，我们要冻结“确定”按钮    okAction.enabled = NO;    [alertController addAction:okAction];//    [alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {//        NSLog(@"点击确定");//    }]];        [alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {                textField.placeholder = @"请输入拒绝原因";        // 是否安全输入        textField.secureTextEntry = NO;        // 添加一个通知，改变okAction的状态        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(alertTextFieldDidChange:) name:UITextFieldTextDidChangeNotification object:textField];    }];            [self presentViewController:alertController animated:YES completion:^{            }];    //    // 设置2.0秒后alertController自动消失//    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.5 * NSEC_PER_SEC)), dispatch_get_main_queue(),^{//    //        [alertController dismissViewControllerAnimated:YES completion:^{//            //        }];//    });}// TextFieldTextDidChange 的通知处理方法- (void)alertTextFieldDidChange:(NSNotification *)notification{        UIAlertController *alertController = (UIAlertController *)self.presentedViewController;    if (alertController) {        UITextField *tf = alertController.textFields.firstObject;        UIAlertAction *okAction = alertController.actions.lastObject;        // 设置okAction的状态，是否可点击        okAction.enabled = tf.text.length > 0;    }}
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