我有30个注释，并且在不断增长。寻找一种更简单的代码编码方式？ [英] I have 30 annotations, and growing. Looking for a simpler way to code this?

问题描述

我正在将多个注释编码到项目中。目前我有30个注释，并且还在增长。我想知道是否有一种简单的方法来为每个单独的注释创建一个annotation.h和annotation.m类。

I am coding multiple annotations into a project. Currently I have 30 annotations, and growing. I'm wondering if there is a simplier way of having to create a annotation.h and annotation.m classes for each single annotation.

目前在我的地图视图控制器中，我创建了注释对象并将它们放在一个数组中，这对我来说效果很好但是你可以想象，它很多一旦你有大量的注释，管理的代码，更不用说大量的类。

Currently in my map view controller, I create the annotation objects and place them in an array, which has been working well for me but as you could imagine, its a lot of code to manage once you have tons of annotations, not to mention tons of classes.

因此，例如，其中一个注释类看起来像这样：

So for example, one of the annotation classes looks like this:

Annotation.h：

Annotation.h:

//Annotation.h

#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>

@interface Annotation : NSObject {

}

@end

Annotation.m：

Annotation.m:

//Annotation.m

#import "Annotation.h"

@implementation Annotation

-(CLLocationCoordinate2D)coordinate;
{
    CLLocationCoordinate2D theCoordinate;
    theCoordinate.latitude = -45.866416;
    theCoordinate.longitude = 170.519931;
    return theCoordinate; 
}

-(NSString *)title
{
    return @"Title";
}

-(NSString *)subtitle
{
    return @"Subtitle";
}

-(void)dealloc
{
    [super dealloc];
}

@end

我正在考虑阅读在包含所有注释的CSV文件中，这是最好的方法，我选择的任何选项都会导致我重写大量代码，这就是为什么我在做任何事之前都会问这个问题。有没有人有任何建议？

I'm thinking of reading in a CSV file with all the annotations would be the best way to go, any option I choose will result in me rewriting a lot of code, which is why I'm asking this question before I do anything. Does anyone have any suggestions?

推荐答案

遗憾的是，MapCallouts示例应用程序并未提供如何实现通用注释的良好示例类。

The MapCallouts sample app unfortunately doesn't give a good example of how to implement a generic annotation class.

实现 MKAnnotation 协议的类可以提供可设置的坐标属性或采用坐标的自定义init方法。

Your class that implements the MKAnnotation protocol can provide a settable coordinate property or a custom init method that takes the coordinates.

但是，由于您使用的是iOS 4.0，因此更简单的选择就是使用预定义的 MKPointAnnotation 类，提供您可以设置的属性。例如：

However, since you're using iOS 4.0, an easier option is to just use the pre-defined MKPointAnnotation class that provides properties that you can set. For example:

MKPointAnnotation *annot = [[MKPointAnnotation alloc] init];
annot.title = @"Title";
annot.subtitle = @"Subtitle";
annot.coordinate = CLLocationCoordinate2DMake(-45.866416, 170.519931);
[mapView addAnnotation:annot];
[annot release];

注释数据当然可以来自任何地方，您可以循环访问数据以创建注释地图。

The annotation data can of course come from anywhere and you can loop through the data to create the annotations on the map.

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