【发布时间】：2011-11-27 11:17:52
【问题描述】：
在我的应用程序中，我使用 Apple 的 KMLViewer 显示从 KML 文件中获取的注释。在文件 KMLParser.m 中，有一个实例变量 placemarkDescription 将描述标签下的信息从 kml 文件转换为注释subtitle.Now，在我的文件中，每个注释都以这种方式存储在描述下的信息：
<table width="280px"><tr><td></td><td></td></tr></table><table width="280px"><tr><td><b>Fitness Bulls</b>---Palester sportive. Sporti dhe koha e lire.....<a href="http://www.site.com/BIZ_DIR/810180432/Article-Fitness-Bulls.aspx" style="color:Green;" >Shikoni detajet >></a></td></tr><tr><td><a href="http://www.site.com/HartaV2/AddReview.aspx?gisDataId=8123855e-b798-40bc-ad2e-00346a931211" style="color:Green;" >Shkruani pershtypjen tuaj >> </a> <p style="float:right;">Postuar nga:<i>Import</i></p></td></tr></table>
在 KMLParser.m 中，我将 placemarkDescription 从那个转换为这个：
<html><body>
<table width="280px"><tr><td></td><td></td></tr></table><table width="280px"><tr><td>
<b>Fitness Bulls</b>---Palester sportive. Sporti dhe koha e lire.....
<a href="http://www.site.com/BIZ_DIR/810180432/Article-Fitness-Bulls.aspx" style="color:Green;" >Shikoni detajet >></a></td></tr><tr><td>
<a href="http://www.site.com/HartaV2/AddReview.aspx?gisDataId=8123855e-b798-40bc-ad2e-00346a931211" style="color:Green;" >Shkruani pershtypjen tuaj >> </a> <p
style="float:right;">Postuar nga:<i>Import</i></p></td></tr></table>
</body></html>
我这样做是因为我想将此字符串传递给 webView 并在其中可视化它。
问题是，当 kml 加载时，方法获取描述信息，被称为严重时间。与存储在 kml 中的地标的时间完全一样。所以直接传递字符串没有效果。如果我选择设置激活字幕选项（ annotation.subtitle = placemarkDescription 在 KMLParser 中），也许我会获取用户点击的注释的字幕信息，但我不想显示此信息，因为它显示如下
<table width="280px"><tr><td></td><td></td></tr></table><table width="280px"><tr......
顺便说一句，我不知道如何获取所选注释的字幕信息。 到目前为止，我只设法将描述信息存储在一个数组中（在 KMLParser.m 中完成）。但是我应该如何处理该数组？如何知道哪个数组条目对应于用户点击的注释（注释标注气泡已打开）。
所以我不知道该怎么办。 可能我还不太清楚：我想做的是获取地标（注解）的Description信息，当用户点击地图中的注解时，点击disclosureButton应该会将他重定向到显示描述信息的webView。
编辑代码添加：
DetailViewController.h
#import <UIKit/UIKit.h>
@interface DetailViewController : UIViewController<UIWebViewDelegate> {
UIWebView *webView;
UITextField *addressBar;
UIActivityIndicatorView *activityIndicator;
NSString *placemarkDescription;
}
@property (nonatomic, retain) IBOutlet UIWebView *webView;
@property (nonatomic, retain) IBOutlet UITextField *addressBar;
@property (nonatomic, retain) IBOutlet UIActivityIndicatorView *activityIndicator;
@property (nonatomic, retain) NSString *placemarkDescription;
-(IBAction) gotoAddress:(id)sender;
-(IBAction) goBack:(id)sender;
-(IBAction) goForward:(id)sender;
@end
DetailViewController.m
#import "DetailViewController.h"
@implementation DetailViewController
@synthesize webView, addressBar, activityIndicator, placemarkDescription;
- (void)viewDidLoad {
[super viewDidLoad];
[webView loadHTMLString:placemarkDescription baseURL:nil];
}
-(IBAction)gotoAddress:(id) sender {
NSURL *url = [NSURL URLWithString:[addressBar text]];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
[webView loadRequest:requestObj];
[addressBar resignFirstResponder];
}
-(IBAction) goBack:(id)sender {
[webView goBack];
}
-(IBAction) goForward:(id)sender {
[webView goForward];
}
- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType {
if (navigationType == UIWebViewNavigationTypeLinkClicked) {
NSURL *URL = [request URL];
if ([[URL scheme] isEqualToString:@"http"]) {
[addressBar setText:[URL absoluteString]];
[self gotoAddress:nil];
}
return NO;
}
return YES;
}
- (void)webViewDidStartLoad:(UIWebView *)webView {
[activityIndicator startAnimating];
}
- (void)webViewDidFinishLoad:(UIWebView *)webView {
[activityIndicator stopAnimating];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (void)dealloc {
[super dealloc];
}
@end
PlacemarkAnnotation2.h
#import <Foundation/Foundation.h>
#import <MapKit/Mapkit.h>
@interface PlacemarkAnnotation2 : NSObject <MKAnnotation> {
CLLocationCoordinate2D coordinate;
NSString * title;
NSString * subtitle;
NSString * placemarkDescription;
}
@property (nonatomic, assign) CLLocationCoordinate2D coordinate;
@property (nonatomic, retain) NSString * title;
@property (nonatomic, retain) NSString * subtitle;
@property (nonatomic, retain) NSString * placemarkDescription;
@end
PlacemarkAnnotation2.m
#import "PlacemarkAnnotation2.h"
@implementation PlacemarkAnnotation2
@synthesize coordinate, title, subtitle, placemarkDescription;
- (id) initWithCoordinate:(CLLocationCoordinate2D)coord andTitle:(NSString *)maintitle andSubtitle:(NSString *)subTitle {
self.coordinate = coord;
self.title = maintitle;
self.subtitle = subTitle;
return self;
}
-(NSString *) placemarkDescription
{
return placemarkDescription;
}
- (void) setPlacemarkDescription: (NSString *) pd
{
placemarkDescription = pd;
}
- (void) dealloc {
[title dealloc];
[subtitle dealloc];
[placemarkDescription dealloc];
[super dealloc];
}
@end
KMLParser.M 中的变化
//KMLPoint class
- (MKShape *)mapkitShape
{
PlacemarkAnnotation2 *annotation = [[PlacemarkAnnotation2 alloc] init];
annotation.coordinate = point;
return [annotation autorelease];
}
//KMLPlacemark class
- (void)_createShape
{
if (!mkShape) {
mkShape = [[geometry mapkitShape] retain];
mkShape.title = name;
// Skip setting the subtitle for now because they're frequently
// too verbose for viewing on in a callout in most kml files.
NSString *lessThan = @"<";
NSString *greaterThan = @">";
placemarkDescription = [placemarkDescription stringByReplacingOccurrencesOfString:lessThan
withString:@"<"];
placemarkDescription = [placemarkDescription stringByReplacingOccurrencesOfString:greaterThan
withString:@">"];
NSString *beforeBody = @"<html><body>";
NSString *afterBody = @"</body></html>";
NSString *finalContent = [[beforeBody stringByAppendingString:placemarkDescription]
stringByAppendingString:afterBody];
placemarkDescription = finalContent;
mkShape.placemarkDescription = placemarkDescription;
}
}
在这行代码中发现错误（无崩溃原因描述）：
-(void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view
calloutAccessoryControlTapped:(UIControl *)control
{
NSLog(@">>> Entering %s <<<", __PRETTY_FUNCTION__);
DetailViewController *dvc = [[DetailViewController alloc] initWithNibName:@"DetailViewController" bundle:[NSBundle mainBundle]];
PlacemarkAnnotation2 *pa = (PlacemarkAnnotation2 *)view.annotation;
dvc.placemarkDescription = pa.placemarkDescription;
[self presentModalViewController:dvc animated:YES];
[dvc release];
NSLog(@"<<< Leaving %s >>>", __PRETTY_FUNCTION__);
}
【问题讨论】：
标签： iphone ios annotations mkmapview kml