多个regionDidChangeAnimated调用 - 什么给？ [英] multiple regionDidChangeAnimated calls - what gives?
问题描述
我在一个UITableView中有一个MKMapView作为一个自定义单元格（不要问;） - 不知道它是否真的很重要），为此我注册了一个regionDidChangeAnimated委托方法。这个方法在加载UITableView时调用了三次 - 一次是实际的区域，然后是两次，一个区域是关闭的。在模拟器中，我始终得到一个中心区域（+37.43997405，-97.03125000）。在设备上，它似乎取决于位置管理器报告的位置，该位置管理器初始化地图视图。
I have a MKMapView inside a UITableView as a custom cell (don't ask ;) - don't know if it matters really), for which I register a regionDidChangeAnimated delegate method. This method gets called three times when the UITableView is loaded - once with the actual region and then two more times with a region that is way off. In the simulator, I consistently get a region with center (+37.43997405, -97.03125000). On the device, it seems to depend on the location reported by the location manager, which initializes the map view.
为什么我会收到三个regionDidChangeAnimated调用？为什么中间坐标是最后两个关闭的？
Why am I getting three regionDidChangeAnimated calls? And why are the center coordinates for the last two of them off?
这是我用来获取中心坐标的代码：
This is the code I use to get the center coordinates:
- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated {
CLLocation *l = [[CLLocation alloc] initWithLatitude:self.mapView.centerCoordinate.latitude longitude:self.mapView.centerCoordinate.longitude];
(....)
推荐答案
I已经在自定义表格视图单元格内设置了一个地图视图，并将该单元格添加到了一个表格视图中（尽管它绝对不应该关注地图视图的显示位置）。
I have set up a map view inside a custom table view cell and added that cell to a table view (although it definitely should not matter where/how the map view is displayed).
我看不到任何对 regionDidChangeAnimated：委托方法的意外调用。
I do not see any unexpected calls to the regionDidChangeAnimated: delegate method.
我看到对此方法的调用只有在以下情况时：
I see calls to this method only when:
- 用户更改地图的位置/缩放比例，或
- 更改地图的中心/范围
您确定您看到意外呼叫吗？您没有使用代码来设置地图的区域（中心/跨度）？
Are you sure that you are seeing unexpected calls? You are not using code to setup the region (center/span) of the map?
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