iphone - 汽车(注释)动画(如 super 应用程序)无法正常工作

Question

我做了一个演示项目(来自 github 上的 Moving-MKAnnotationView 演示)，用于在 map 上移动汽车，下面是它的链接

https://github.com/pratikbhiyani/Moving-MKAnnotationView

我根据 vinaut 给出的答案编辑我的代码，但仍然问题是，当我们缩放或滚动 map 动画时，在 ios 7 和 ios 6 中，当我们缩放或滚动 map 注释设置为它原来的角度一会儿。

下面是我的演示项目的屏幕截图

这是我修改的一些代码

- (void) setPosition : (id) posValue;
{
    NSLog(@"set position");

    //extract the mapPoint from this dummy (wrapper) CGPoint struct
    MKMapPoint mapPoint = *(MKMapPoint*)[(NSValue*)posValue pointerValue];

    CLLocationCoordinate2D coord = MKCoordinateForMapPoint(mapPoint);
    CGPoint toPos;
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7) {

        toPos = [self.mapView convertCoordinate:coord toPointToView:self.mapView];
    }
    else
    {
        CGFloat zoomFactor =  self.mapView.visibleMapRect.size.width / self.mapView.bounds.size.width;
        toPos.x = mapPoint.x/zoomFactor;
        toPos.y = mapPoint.y/zoomFactor;
    }



    [self setTransform:CGAffineTransformMakeRotation([self getHeadingForDirectionFromCoordinate:MKCoordinateForMapPoint(previousPoint) toCoordinate: MKCoordinateForMapPoint(mapPoint)])];

    if (MKMapRectContainsPoint(self.mapView.visibleMapRect, mapPoint)) {

        CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"position"];

        animation.fromValue = [NSValue valueWithCGPoint:self.center];
        animation.toValue = [NSValue valueWithCGPoint:toPos];
        animation.duration = 1.0;
        animation.delegate = self;
        animation.fillMode = kCAFillModeForwards;
        //[self.layer removeAllAnimations];
        [self.layer addAnimation:animation forKey:POSITIONKEY];

        //NSLog(@"setPosition ANIMATED %x from (%f, %f) to (%f, %f)", self, self.center.x, self.center.y, toPos.x, toPos.y);
    }

    self.center = toPos;

    previousPoint = mapPoint;
}

我的目标是像在优步应用中一样移动汽车。

Answer 1

似乎 CLCoordinate2D/MKMapPoint/CGPoint 的转换函数发生了一些变化...

Detecting a point in a MKPolygon broke with iOS7 (CGPathContainsPoint)

注释消失了，因为 MkMapPoints 和 CGI​​Points 之间的转换不再起作用，如果你记录 CALayer 的“位置”，你将得到 View 之外的点。不知道为什么它在执行触摸事件时有效。

如果将函数更改为:

    - (void) setPosition : (id) posValue; 
{
    //extract the mapPoint from this dummy (wrapper) CGPoint struct
    MKMapPoint mapPoint = *(MKMapPoint*)[(NSValue*)posValue pointerValue];  
    CLLocationCoordinate2D coord = MKCoordinateForMapPoint(mapPoint);

    CGPoint toPos = [self.mapView convertCoordinate:coord toPointToView:self.mapView];


    if (MKMapRectContainsPoint(self.mapView.visibleMapRect, mapPoint)) {

        CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"position"];

        animation.fromValue = [NSValue valueWithCGPoint:self.center];
        animation.toValue = [NSValue valueWithCGPoint:toPos];   
        animation.duration = 0.8;
        animation.delegate = self;
        animation.fillMode = kCAFillModeForwards;
        //[self.layer removeAllAnimations];
        [self.layer addAnimation:animation forKey:POSITIONKEY];

        //NSLog(@"setPosition ANIMATED %x from (%f, %f) to (%f, %f)", self, self.center.x, self.center.y, toPos.x, toPos.y);
    }   

    self.center = toPos;


}

它应该会再次工作。