以编程方式在iOS7中旋转MKMapView [英] Programmatically rotating a MKMapView in iOS7

问题描述

我有一个应用程序，当前使用CGAffineTransformMakeRotation来操作MKMapView，以便显示具有正确方向和大小的地图。随着iOS7的发布，这种方法变得不可靠（地图中心不断变换）。我希望用更可靠的解决方案来解决这个问题。

I have an app that currently uses CGAffineTransformMakeRotation to manipulate a MKMapView in order to display the map with the correct orientation and size. With the release of iOS7 this method has become unreliable (map center keeps shifting). I am hoping to solve this with a more reliable solution.

有没有办法在不使用CGAffineTransformMakeRotation的情况下在代码中旋转地图？

Is there a way to rotate the map in code without using CGAffineTransformMakeRotation?

我看了MKMapCamera希望我可以操纵它来传递staic值来操纵地图但是没有办法手动设置centerCoordinate和eyeCoordinate。

I looked at the MKMapCamera in hopes I could manipulate it into passing staic values to manipulate the map but there is no way to manually set the centerCoordinate and the eyeCoordinate.

推荐答案

您可以通过使用 -setCamera设置新的 MKMapCamera 来旋转和调整地图：动画：。

You can rotate and pitch the map by setting a new MKMapCamera with -setCamera:animated:.

要设置轮换，请为其指定一个新的标题参数：

To set the rotation, give it a new heading parameter:

- (void)viewDidAppear:(BOOL)animated // or wherever works for you
{
    [super viewDidAppear:animated];

    if ([mapView respondsToSelector:@selector(camera)]) {
        MKMapCamera *newCamera = [[mapView camera] copy];
        [newCamera setHeading:90.0]; // or newCamera.heading + 90.0 % 360.0
        [mapView setCamera:newCamera animated:YES];
    }
}

您还可以使用音高进行更精彩的变焦高度变化，显示建筑物：

You can also do a more fancy zoom with pitch and altitude change, showing buildings:

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];

    if ([mapView respondsToSelector:@selector(camera)]) {
        [mapView setShowsBuildings:YES];
        MKMapCamera *newCamera = [[mapView camera] copy];
        [newCamera setPitch:45.0];
        [newCamera setHeading:90.0];
        [newCamera setAltitude:500.0];
        [mapView setCamera:newCamera animated:YES];
    }

}

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