如何在Mapview中添加注释，使用iPhone中的图像和标签？

问题描述

我在我的iPhone应用程序中使用MKMapview。

I am using MKMapview in my iPhone app.

如何在MKMapkit框架中的注释中指定值？

How can I assign values in annotation in MKMapkit Framework?

推荐答案

您可以使用一个 UIView ，一个 UIImageView 和一个Label来显示不同的值来为每个注释使用自定义视图。这将在方法 - （MKAnnotationView *）mapView：（MKMapView *）newMapView viewForAnnotation :(（id）newAnnotation 的方法中完成。相对于 UIImageView ，您必须使用透明颜色的 UIView 双倍大小，以使更准确的放大视图缩小地图视图。

You can use custom view for each annotation with one UIView, one UIImageView and one Label to display different value. This will be done within the method - (MKAnnotationView *)mapView:(MKMapView *)newMapView viewForAnnotation:(id )newAnnotation. You have to take UIView double in size with transparent color with respect to UIImageView to make more precise view on zoom in and zoom out in mapview.

代码-----

-(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
    static NSString * const kPinAnnotationIdentifier = @"PinIdentifier";
    if(annotation == self._mapView.userLocation)
    {
        return nil;
    }

    MyAnnotation *myAnnotation  = (MyAnnotation *)annotation;
    MKAnnotationView *newAnnotation = (MKAnnotationView*)[self._mapView dequeueReusableAnnotationViewWithIdentifier:kPinAnnotationIdentifier];

    if(!newAnnotation){
        newAnnotation = [[MKAnnotationView alloc] initWithAnnotation:myAnnotation reuseIdentifier:@"userloc"];
    }

    NSDictionary *dict=[alertInfoArray objectAtIndex:myAnnotation.ann_tag];
    UIView *anView=[[UIView alloc] init];
    anView.backgroundColor=[UIColor clearColor];

    UIImageView *bgImg=[[UIImageView alloc] init];
    bgImg.image=[UIImage imageNamed:@""];
    bgImg.backgroundColor=[UIColor clearColor];

    UIImageView *imgView=[[UIImageView alloc] init];
    imgView.tag=myAnnotation.ann_tag;

    UILabel *lblName=[[UILabel alloc] init];
    lblName.font=[UIFont systemFontOfSize:12];
    lblName.textAlignment=UITextAlignmentCenter;
    lblName.textColor=[UIColor whiteColor];
    lblName.backgroundColor=[UIColor clearColor];
    lblName.text=TEXT YOU WANT ;

    newAnnotation.frame=CGRectMake(0, 0, 70, 212);
    anView.frame=CGRectMake(0, 0, 70, 212);
    bgImg.frame=CGRectMake(0, 0, 70, 106);
    bgImg.image=[UIImage imageNamed:@"thumb-needhelp.png"];

    imgView.frame=CGRectMake(8,25,55,48);
    imgView.image=[UIImage imageNamed:@"girl-default.png"];
    lblName.frame=CGRectMake(5,79,60,10);



    [anView addSubview:bgImg];
    [bgImg release];
    [anView addSubview:imgView];
    [imgView release];
    [newAnnotation addSubview:anView];
    [anView release];

    newAnnotation.canShowCallout=YES;
    [newAnnotation setEnabled:YES];

    return newAnnotation;
}

希望这有帮助。

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