Question

我想创建一个自定义alertView，其效果类似于instagram应用（当用户输入错误的密码或电子邮件时，登录/注册视图）。警报动画应下拉并暂停以供用户阅读约2秒钟，然后alertView再次上升。我怎么能这样做？

以下是我现在所拥有的：

- (UIView *) createAlertViewWithViewController:(UIViewController *)viewController andText:(NSString *)alertText
{
    alertView = [[UIView alloc] init];
    [alertView setBackgroundColor:ALERT_VIEW_COLOR];
    [alertView setFrame:ALERT_VIEW_HIDE_FRAME];


    UILabel *alertViewLabel = [[UILabel alloc] init];
    [alertViewLabel setFrame:CGRectMake(viewController.view.bounds.origin.x, 7, viewController.view.bounds.size.width, ALERT_VIEW_HEIGHT)];
    [alertViewLabel setTextAlignment:NSTextAlignmentCenter];
    [alertViewLabel setTextColor:[UIColor whiteColor]];
    [alertViewLabel setFont:[UIFont systemFontOfSize:13.0f]];
    [alertViewLabel setText:alertText];
    [alertView addSubview:alertViewLabel];

    CGPoint originalCenter = alertView.center;
    [UIView animateWithDuration:0.5
                     animations:^{
                         CGPoint center = alertView.center;
                         center.y += ALERT_VIEW_HEIGHT;
                         alertView.center = center;
                     }
                     completion:^(BOOL finished){

                         [UIView animateWithDuration:3.0
                                          animations:^{
                                              alertView.center = originalCenter;
                                          }
                                          completion:^(BOOL finished){
                                              ;
                                          }];

                     }];

    return alertView;
}

我的代码现在下降并立即上升，但我想要的是，当它完成下拉动画时，它会暂停约2秒，然后进行上升动画。

我现在已经搜索了3天，但我还没找到任何一个。

示例图像何时暂停2秒：

enter image description here

Answer 1

你想要这个图书馆吗？ https://github.com/problame/CSNotificationView

实施例

[CSNotificationView showInViewController:self
    tintColor:[UIColor colorWithRed:0.000 green:0.6 blue:1.000 alpha:1]
        image:nil
      message:@"What's the meetup called?"
     duration:2.f];

Answer 2

我猜你正在寻找[UIView animateWithDuration:...

的扩展版本之一

+ (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion

延迟等待你的动画。

Answer 3

试试这个：

UILabel *myLable=[[UILabel alloc]init];
myLable.frame=CGRectMake(0, -50, 320, 50);
myLable.backgroundColor=[UIColor grayColor];
myLable.textAlignment=NSTextAlignmentCenter;
myLable.text=@"Your Error Message";
[self.view addSubview:myLable];

[self ShowAnimation:myLable currentFrame:CGRectMake(0, -50, 320, 50) newFrame:CGRectMake(0, 0, 320, 50)];

-(void)ShowAnimation:(UILabel *)aLable currentFrame:(CGRect)aCurrentFrame newFrame:(CGRect)aNewFrame
{
    [aLable setFrame:aCurrentFrame];
    [UIView animateWithDuration:1.5 animations:^{
        [aLable setFrame:aNewFrame];
    }completion:^(BOOL finished)
        {
            [aLable setFrame:aNewFrame];

            [UIView animateWithDuration:1.5 delay:2.0 options:UIViewAnimationOptionCurveEaseIn
                         animations:^{
                                [aLable setFrame:aCurrentFrame];
                            }
                             completion:^(BOOL finished) {
                             }];
        }];    
}

如何制作动画然后暂停然后继续动画？

3 个答案: