多个注释颜色 [英] Multiple annotation color

问题描述

我有一个带有多个注释的地图。我能够显示第一个和最后一个注释。我想给每个注释一个不同的颜色。

i have a map with multiple annotation on it. i was able to show the first and the last annotations. i want to give each annotation a different color.

这里是我的如何插入我的注释的代码

here is my code of how to insert my annotations

if(i<1 || i >object.count-2)            
{    
        MyAnnotation* myAnnotation1=[[MyAnnotation alloc] init];                        
        myAnnotation1.coordinate=theCoordinate1;
        myAnnotation1.title=DEVNAME;
        myAnnotation1.subtitle=it.address;                        
        [mapView addAnnotation:myAnnotation1];                        
        [annotations addObject:myAnnotation1];                             
}

if条件是读取数组的索引只删除第一个和最后一个注释。

the if condition is reading the index of the array to only drop the first and last annotation.

这里是我如何放置地图上的引脚...

and here is how do i drop the pins on the map...

-(MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:
    (id <MKAnnotation>)annotation {
    MKPinAnnotationView *pinView = nil; 
    if(annotation != mapView.userLocation)  
    {

        static NSString* MyAnnotationIdentifier = @"MyAnnotationIdentifier";
        MKPinAnnotationView* customPinView = [[[MKPinAnnotationView alloc]
                                               initWithAnnotation:annotation reuseIdentifier:MyAnnotationIdentifier] autorelease];
        customPinView.pinColor = MKPinAnnotationColorRed;
        customPinView.animatesDrop = YES;
        customPinView.canShowCallout = YES;



       UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
        customPinView.rightCalloutAccessoryView = rightButton;

        return customPinView;
    }
    else
    {
        pinView.annotation = annotation;
    }
    return pinView;
  }

如何使用不同的注释颜色？

how to different annotations color?

推荐答案

使用MKAnnotationView类并为每个引脚设置自定义图像：

Use MKAnnotationView class and set a custom image for each pin:

MKAnnotationView *customPinView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:nil];
customPinView.image = [UIImage imageNamed:@"pin1.png"];
.
.
.

而不是使用应用包中的图像，您可能需要以编程方式构建您的UIImage，以便您可以实现独特的颜色，这取决于你。

instead of using images from your app bundle, you might need to programmatically build your UIImage so you can achieve unique colors, this is up to you.

此外，您可以在注释上设置一个值，以帮助确定哪个注释获取哪个图像。你将子类化MKAnnotation来添加这个名为pinNumber的整数属性。

Furthermore, you can set a value on your annotation to help identify which annotation gets which image. You'll subclass MKAnnotation to add this integer property called pinNumber.

myAnnotation.pinNumber = 2;

myAnnotation.pinNumber = 2;

customPinView.image = [UIImage imageNamed:[NSString stringWithFormat:@"pin%d.png",annotation.pinNumber]];

这篇关于多个注释颜色的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！