Ios 在地图注释视图上设置标题和副标题

我回答了这个问题：-为邮政编码创建地图注释，而不是直接使用long/lat值

CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] 
placemark.title = self.business.businessName;
placemark.subtitle = self.business.phoneNumber;

这很好，但是我想设置anno的标题和副标题

CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] 
placemark.title = self.business.businessName;
placemark.subtitle = self.business.phoneNumber;

---

这不起作用，因为标题和副标题是只读的。如何更改上述内容，以便设置标题和副标题？

使用

MKPointAnnotation

CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] 
placemark.title = self.business.businessName;
placemark.subtitle = self.business.phoneNumber;

示例代码：

CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] 
placemark.title = self.business.businessName;
placemark.subtitle = self.business.phoneNumber;

CLPlacemark *topresult = [placemarks objectAtIndex:0];
MKPointAnnotation *annotation = [[MKPointAnnotation alloc] init];
annotation.coordinate = topresult.location.coordinate;
annotation.title = self.business.businessName;
annotation.subtitle = self.business.phoneNumber;
[self.mapView addAnnotation:annotation];

---

您可以尝试下面的代码。这可能对你有帮助

CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] 
placemark.title = self.business.businessName;
placemark.subtitle = self.business.phoneNumber;

//set the title if we got any placemarks...
if (placemark.count > 0)
{
    CLPlacemark *topResult = [placemark objectAtIndex:0];
    annTitle = [NSString stringWithFormat:@"%@ %@ %@ %@", topResult.country, topResult.locality, topResult.subLocality, topResult.thoroughfare];
}

//now create the annotation...
MapAnnotation *toAdd = [[MapAnnotation alloc]init];

toAdd.coordinate = touchMapCoordinate;
toAdd.title = @"Address";
toAdd.subtitle = @"Sub Address";

[self.map addAnnotation:toAdd];

---

请参考以下内容以了解您的查询。您不需要“必须”专门使用MKPointAnnotation——只需要一些实现MKAnnotation并具有可设置标题和副标题的类（类似于MKPointAnnotation，但您可以创建自己的类）。另外，

locationManager.location.coordinate

应该是

topResult.location.coordinate

@Anna:True。更新。谢谢