ios - 从指定点呈现模态 Controller

Question

我在某些 viewController View 上有按钮。 touchUpInside: 方法呈现模态视图 Controller 。我想从点击按钮框架的中心展示它们。我怎样才能达到这个结果？我试过:

webController.view.transform = CGAffineTransformScale(CGAffineTransformIdentity, self.buuton.center.x, self.button.center.y);
        [self presentViewController:webController animated:NO completion:^{
            // some code
        }];

但它损坏了我的用户界面。我也尝试使用[UIView beginAnimation]，没有成功。

Answer 1

我用一个技巧实现了类似的效果，将 destvc.view 作为 subview 添加到 sourcevc.view，请参阅下面我的函数以进行缩放。

你可以只用视觉效果一样的技巧，最后展示你的vc，没有动画:

    +(void) animWithAlpha:(float)alpha view:(UIView*)view{
          [UIView animateWithDuration:0.15
                          delay:0.0
                        options:UIViewAnimationOptionBeginFromCurrentState
                     animations:^{
                         view.alpha = alpha;
                     }
                     completion:^(BOOL fin) {}];
    }


    +(void) zoomIN:(UIViewController*)sourceViewController destination:(UIViewController*)destinationViewController fromPoint:(CGPoint)point{

        [sourceViewController.view addSubview:destinationViewController.view];
        [destinationViewController.view setFrame:sourceViewController.view.window.frame];
        [destinationViewController.view setTransform:CGAffineTransformMakeScale(0.15, 0.1)];
        destinationViewController.view.center  = point;
        sourceViewController.view.userInteractionEnabled=NO;
        destinationViewController.view.alpha = 0.5;
        [self animWithAlpha:1 view:destinationViewController.view];
        [UIView animateWithDuration:0.4
                              delay:0.0
                            options:UIViewAnimationOptionCurveEaseInOut
                         animations:^{
                             [destinationViewController.view setTransform:CGAffineTransformMakeScale(1, 1)];
                             destinationViewController.view.center  = sourceViewController.view.center;
                         }
                         completion:^(BOOL finished){
                             if(finished){
                                 [destinationViewController.view setTransform:CGAffineTransformMakeScale(1, 1)];
                                 destinationViewController.view.center  = sourceViewController.view.center;
                                 sourceViewController.view.userInteractionEnabled=YES;
                             }
                         }];

    }

    +(void) zoomOUT:(UIViewController*)sourceViewController  destination:(UIView*)destination toPoint:(CGPoint)point{
        [sourceViewController.view setTransform:CGAffineTransformMakeScale(1.0, 1.0)];
        [sourceViewController.parentViewController.view setUserInteractionEnabled:NO];
        [destination setUserInteractionEnabled:NO];
        [UIView animateWithDuration:0.4
                              delay:0.0
                            options:UIViewAnimationOptionCurveEaseOut
                         animations:^{
                             [sourceViewController.view setTransform:CGAffineTransformMakeScale(0.01, 0.01)];
                             [sourceViewController.view setAlpha:1.0];
                             sourceViewController.view.center  = point;
                         }
                         completion:^(BOOL finished){
                             if(finished){
                                 [sourceViewController.view setTransform:CGAffineTransformMakeScale(1.0, 1.0)];
                                 [sourceViewController.view removeFromSuperview];
                                 sourceViewController.view.center  = point;
                                 [destination setUserInteractionEnabled:YES];
                             }
    }