当用户移动时，我想在他原来的位置绘制另一个mkannotation，这与objective-c中当前的注解不同。

// 自定义MKAnnotation类
@interface CustomAnnotation : NSObject <MKAnnotation>

@property (nonatomic, copy) NSString *title;
@property (nonatomic, copy) NSString *subtitle;
@property (nonatomic, assign) CLLocationCoordinate2D coordinate;

@end

@implementation CustomAnnotation

@end

// 在移动用户时添加新的MKAnnotation
- (void)moveUserAndAddAnnotation {
    // 获取用户当前位置
    CLLocationCoordinate2D userCoordinate = self.mapView.userLocation.coordinate;
    
    // 创建新的MKAnnotation对象
    CustomAnnotation *newAnnotation = [[CustomAnnotation alloc] init];
    newAnnotation.title = @"New Annotation";
    newAnnotation.subtitle = @"This is a new annotation";
    newAnnotation.coordinate = userCoordinate;
    
    // 添加新的MKAnnotation到地图上
    [self.mapView addAnnotation:newAnnotation];
}