問題描述

我正在注釋我的地圖并設置圖像就好了，但是當我點擊 MapView 上的注釋時，圖像會從我的自定義圖像返回到紅色圖釘.這是為什么呢?

I am annotating my map and setting an image just fine, but when I tap the annotation on the MapView, the image goes from my custom image back to the red pin. Why is this?

- (MKAnnotationView *)mapView:(MKMapView *)newMapView viewForAnnotation:(id )newAnnotation {
    MKPinAnnotationView *annotation = [[MKPinAnnotationView alloc] initWithAnnotation:newAnnotation reuseIdentifier:@"currentloc"];
    if (annotation == nil) {
        annotation = [[MKAnnotationView alloc] initWithAnnotation:newAnnotation reuseIdentifier:@"currentloc"];
    }

    annotation.image = [UIImage imageNamed:@"anno.png"];
    annotation.canShowCallout = YES;
    annotation.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
    UIImageView *imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"bus_stop_30x30.png"]];
    annotation.leftCalloutAccessoryView = imgView;

    return annotation;
}

我的代碼看起來與一些不會產生此問題的示例代碼相同.

My code looks identical to some sample code that does not produce this problem.

推薦答案

在這里回答我自己的問題，以防其他人有同樣的問題.請注意，我正在使用MKPinAnnotationView" - 它應該更改為MKAnnotationView"并且一切正常.

Answering my own question here, just in case others have the same issue. Notice that I am using "MKPinAnnotationView" - it should be changed to "MKAnnotationView" and everything works.

固定代碼:

- (MKAnnotationView *)mapView:(MKMapView *)newMapView viewForAnnotation:(id )newAnnotation {
    MKAnnotationView *annotation = [[MKAnnotationView alloc] initWithAnnotation:newAnnotation reuseIdentifier:@"currentloc"];

    if (annotation == nil) {
        annotation = [[MKAnnotationView alloc] initWithAnnotation:newAnnotation reuseIdentifier:@"currentloc"];
    }

    annotation.image = [UIImage imageNamed:@"anno.png"];
    annotation.canShowCallout = YES;
    annotation.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
    UIImageView *imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"bus_stop_30x30.png"]];
    annotation.leftCalloutAccessoryView = imgView;

    return annotation;
}

這篇關于為什么自定義的 MKMapView 注釋圖像在觸摸時會消失?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！