如何在iOS中设置缩放级别

Question

我正在使用下面给出的代码在地图视图中设置区域：

    CLLocationCoordinate2D loc = (CLLocationCoordinate2D )[self geoCodeUsingAddress:searchBar.text];
    CLLocationDistance visibleDistance = 100000;
    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(loc, visibleDistance, visibleDistance);
    MKCoordinateRegion adjustedRegion = [self.mapView regionThatFits:region];
    [self.mapView setRegion:adjustedRegion animated:YES];
    [self.mapView setCenterCoordinate:loc];
    [self.mapView setZoomEnabled:YES];

它在一个小区域内显示整个地图。如何增加缩放级别？

Answer 1

你也可以帮助

MapView span值。对小区域进行动画处理，并跨度地图以缩放所需的值。

使用以下代码：

CLLocationCoordinate2D loc = (CLLocationCoordinate2D )[self geoCodeUsingAddress:searchBar.text];
[UIView animateWithDuration:1.5 animations:^{
    MKCoordinateRegion region;
    region.center.latitude = loc.latitude;
    region.center.longitude = loc.longitude;
    region.span.latitudeDelta = 0.15f;       // Decrement value to zoom
    region.span.longitudeDelta = 0.15f;      // Decrement value to zoom
    [self.mapView setRegion:region animated:YES];
} completion:^(BOOL finished) { }];

Answer 2

将visibleDistance更改为较小的数字。尝试直到找到自己喜欢的东西。

Answer 3

最后，

我通过删除解决了这个问题

[self.mapView setCenterCoordinate:loc];

当我删除上述内容时，我工作得很好。

Answer 4

试试这个，

CLLocationCoordinate2D loc = (CLLocationCoordinate2D )[self geoCodeUsingAddress:searchBar.text];
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(loc, visibleDistance, visibleDistance);
region.span.latitudeDelta = 0.15f;     
region.span.longitudeDelta = 0.15f; 
[self.mapView setRegion:region animated:YES];
[self.mapView setZoomEnabled:YES];