为什么在平移时从未调用regionWillChangeAnimated:？

发布于 2024-12-17 07:35:49 字数 1044 浏览 1 评论 0原文

问题：

我的 MKMapViewDelegate 的 - (void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated 选择器永远不会被调用我在 iPhone 5.0 模拟器中平移地图（但在缩放时调用）。它在 4.3 模拟器和 4.3 设备上正常工作（或者至少我认为应该如此）。我目前无法访问 5.0 设备。

情况：

我有一个 MKMapView 实例（在 Interface Builder 中创建） - 我在 viewWillLoad 中仔细检查了它

- (void)viewDidLoad {
    assert(self.myMapView);
    [self.stopMapView setDelegate:self];
}

我进一步定义了一些 MKMapViewDelegate 的选择器，但涉及的选择器我是：

- (void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated
{
    RKLogDebug(@"Will Change map longSpan: %lf", mapView.region.span.longitudeDelta);
}

- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated
{
    RKLogDebug(@"Did Change map longSpan: %lf", mapView.region.span.longitudeDelta);
}

这是怎么回事？在 iPhone 5.0 模拟器上，代理不会以某种方式获悉 MKMapView 中的“平移”。我已经尝试重置模拟器内容但无济于事。我想知道这是否只是一些模拟器错误或 iOS5 的预期行为？（我使用的是 10.7.2 和 Xcode 4.2）。

原文

The problem:

My MKMapViewDelegate's - (void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated selector is never called while i pan the map (but is called while zooming) in iPhone 5.0 simulator. It works as it should (or at least i suppose it should) on 4.3 simulator and 4.3 device. I don't have access to 5.0 device at the moment.

Situation:

I have a MKMapView instance (created in Interface Builder) - i double checked it in viewWillLoad

- (void)viewDidLoad {
    assert(self.myMapView);
    [self.stopMapView setDelegate:self];
}

I further define some of the MKMapViewDelegate's selectors, but the ones that concern me are:

- (void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated
{
    RKLogDebug(@"Will Change map longSpan: %lf", mapView.region.span.longitudeDelta);
}

- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated
{
    RKLogDebug(@"Did Change map longSpan: %lf", mapView.region.span.longitudeDelta);
}

What's going on here? The delegate is not somehow informed about the 'panning' in the MKMapView while on iPhone 5.0 Simulator. I already tried to reset simulator content but to no avail. I wonder whether is it just some simulator bug or iOS5's intended behavior? (I'm on 10.7.2 & Xcode 4.2).

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