使用可能的JSON将自定义注释发送到webView吗

使用可能的JSON将自定义注释发送到webView吗

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使用可能的JSON将自定义注释发送到webView吗?

本文介绍了使用可能的JSON将自定义注释发送到webView吗?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

早上好StackOverflow，在获得自定义注释标注以在"europeMapView"上运行之后，我现在需要将用户发送到webView，现在我希望webView可能从JSON文件中加载URL，具体取决于哪个标注被点击了.我相信我应该使用NSJSONSerialization，尽管我不确定如何实现它?

Good Morning StackOverflow, after getting my custom annotation call outs to work on my 'europeMapView' I now need to send the user to a webView, now I want the webView to load a URL possibly from a JSON file depending on which callout was clicked. I believe I am supposed to use NSJSONSerialization, although I'm not sure how to implement this?

因此，在"europeMapView"中，单击罗马"调出按钮时，会将用户带到"europeWebView"并加载字符串www.ThingsAboutRome.com.

So in the 'europeMapView' when the 'Rome' call out button is clicked it takes the user to 'europeWebView' and loads the string www.ThingsAboutRome.com.

我想我可以为每个注释都拥有一个webView，但这似乎效率很低. (加上我无法即时更改网址.)

I suppose I could just have a webView for each annotation, but that seems terribly inefficient. (plus I couldn't change the web address on the fly.)

我也在使用Storyboard.

I am using Storyboard too.

#import "UKFlightsEuropeMap.h"
#import "Annotation.h"



@interface UKFlightsEuropeMap ()

@end

@implementation UKFlightsEuropeMap
@synthesize europeMapView;

//Define the Long and Lat of different European cities.


#define EUROPE_LATITUDE 47.3690;
#define EUROPE_LONGITUDE 8.5380;

#define LONDON_LATITUDE 51.5171;
#define LONDON_LONGITUDE 0.1062;

#define PARIS_LATITUDE 48.8742;
#define PARIS_LONGITUDE 2.3470;

#define BRUSSELS_LATITUDE 50.75;
#define BRUSSELS_LONGITUDE 4.53333;

#define BERLIN_LATITUDE 52.5;
#define BERLIN_LONGITUDE 13.35;

#define MUNICH_LATITUDE 48.1333;
#define MUNICH_LONGITUDE 11.5667;

#define ZURICH_LATITUDE 47.3690;
#define ZURICH_LONGITUDE 8.5380;

#define MILAN_LATITUDE 45.4640;
#define MILAN_LONGITUDE 9.1916;

#define MADRID_LATITUDE 40.4000;
#define MADRID_LONGITUDE -3.6833;

#define ROME_LATITUDE 41.9000;
#define ROME_LONGITUDE 12.5000;

#define LISBON_LATITUDE 38.7000;
#define LISBON_LONGITUDE 9.1833;

#define VIENNA_LATITUDE 48.2088;
#define VIENNA_LONGITUDE 16.3726;

#define THE_SPAN 0.01f;


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
    // Custom initialization
}
return self;
}

- (void)viewDidLoad
{
[super viewDidLoad];

[europeMapView setDelegate:self];

// Do any additional setup after loading the view.

//Create my region

MKCoordinateRegion myRegion;

//Set region centre
CLLocationCoordinate2D center;
center.latitude = EUROPE_LATITUDE;
center.longitude = EUROPE_LONGITUDE;

//Set span (zoom level)
MKCoordinateSpan span;
span.latitudeDelta = THE_SPAN;
span.longitudeDelta = THE_SPAN;

myRegion.center = center;
myRegion.span = span;

//Set our region to the europeMapView

[europeMapView setRegion:myRegion animated:YES];


//Annotation

NSMutableArray * locations = [[NSMutableArray alloc] init];
CLLocationCoordinate2D location;
Annotation * myAnn;

//London Annotation

myAnn = [[Annotation alloc] init];
location.latitude = LONDON_LATITUDE;
location.longitude = LONDON_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"London";
myAnn.subtitle = @"London City";


[locations addObject:myAnn];

//Paris Annotation

myAnn = [[Annotation alloc] init];
location.latitude = PARIS_LATITUDE;
location.longitude = PARIS_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Paris";
myAnn.subtitle = @"City of Love";
[locations addObject:myAnn];

//Brussels Annotation

myAnn = [[Annotation alloc] init];
location.latitude = BRUSSELS_LATITUDE;
location.longitude = BRUSSELS_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Brussels";
myAnn.subtitle = @"Brussels";
[locations addObject:myAnn];

//Berlin Annotation

myAnn = [[Annotation alloc] init];
location.latitude = BERLIN_LATITUDE;
location.longitude = BERLIN_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Berlin";
myAnn.subtitle = @"Berlin";
[locations addObject:myAnn];

//Munich Annotation

myAnn = [[Annotation alloc] init];
location.latitude = MUNICH_LATITUDE;
location.longitude = MUNICH_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Munich";
myAnn.subtitle = @"Munich";
[locations addObject:myAnn];

//Zurich Annotation

myAnn = [[Annotation alloc] init];
location.latitude = ZURICH_LATITUDE;
location.longitude = ZURICH_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Zurich";
myAnn.subtitle = @"Zurich";
[locations addObject:myAnn];

//Milan Annotation

myAnn = [[Annotation alloc] init];
location.latitude = MILAN_LATITUDE;
location.longitude = MILAN_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Milan";
myAnn.subtitle = @"Milan";
[locations addObject:myAnn];

//Madrid Annotation

myAnn = [[Annotation alloc] init];
location.latitude = MADRID_LATITUDE;
location.longitude = MADRID_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Madrid";
myAnn.subtitle = @"Madrid";
[locations addObject:myAnn];

//Rome Annotation

myAnn = [[Annotation alloc] init];
location.latitude = ROME_LATITUDE;
location.longitude = ROME_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Rome";
myAnn.subtitle = @"Rome";
[locations addObject:myAnn];

//Lisbon Annotation

myAnn = [[Annotation alloc] init];
location.latitude = LISBON_LATITUDE;
location.longitude = LISBON_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Lisbon";
myAnn.subtitle = @"Lisbon";
[locations addObject:myAnn];

//Vienna Annotation

myAnn = [[Annotation alloc] init];
location.latitude = VIENNA_LATITUDE;
location.longitude = VIENNA_LONGITUDE;
myAnn.coordinate = location;
myAnn.title = @"Vienna";
myAnn.subtitle = @"Vienna";
[locations addObject:myAnn];

//Add the NSMutable Array to the europeMapView.


[self.europeMapView addAnnotations:locations];




}

//Customize the annotation callouts.

-(MKAnnotationView *) mapView:(MKMapView *)europeMapView viewForAnnotation:        (id<MKAnnotation>)annotation { MKPinAnnotationView *MyPin=[[MKPinAnnotationView alloc]     initWithAnnotation:annotation reuseIdentifier:@"current"];
MyPin.pinColor = MKPinAnnotationColorPurple;

UIButton *advertButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
if ([[annotation title] isEqualToString:@"London"]){
    [advertButton addTarget:self action:@selector(LondonClicked:)     forControlEvents:UIControlEventTouchUpInside];
}

if ([[annotation title] isEqualToString:@"Paris"]){
    [advertButton addTarget:self action:@selector(ParisClicked:)     forControlEvents:UIControlEventTouchUpInside];
}

if ([[annotation title] isEqualToString:@"Brussels"]){
    [advertButton addTarget:self action:@selector(BrusselsClicked:) forControlEvents:UIControlEventTouchUpInside];
}

if ([[annotation title] isEqualToString:@"Berlin"]){
    [advertButton addTarget:self action:@selector(BerlinClicked:) forControlEvents:UIControlEventTouchUpInside];
}

if ([[annotation title] isEqualToString:@"Munich"]){
    [advertButton addTarget:self action:@selector(MunichClicked:) forControlEvents:UIControlEventTouchUpInside];
}

if ([[annotation title] isEqualToString:@"Zurich"]){
    [advertButton addTarget:self action:@selector(ZurichClicked:) forControlEvents:UIControlEventTouchUpInside];
}

if ([[annotation title] isEqualToString:@"Milan"]){
    [advertButton addTarget:self action:@selector(MilanClicked:) forControlEvents:UIControlEventTouchUpInside];
}

if ([[annotation title] isEqualToString:@"Madrid"]){
    [advertButton addTarget:self action:@selector(MadridClicked:) forControlEvents:UIControlEventTouchUpInside];
}

if ([[annotation title] isEqualToString:@"Rome"]){
    [advertButton addTarget:self action:@selector(RomeClicked:) forControlEvents:UIControlEventTouchUpInside];
}

if ([[annotation title] isEqualToString:@"Lisbon"]){
    [advertButton addTarget:self action:@selector(LisbonClicked:) forControlEvents:UIControlEventTouchUpInside];
}

if ([[annotation title] isEqualToString:@"Vienna"]){
    [advertButton addTarget:self action:@selector(ViennaClicked:) forControlEvents:UIControlEventTouchUpInside];
}


MyPin.rightCalloutAccessoryView = advertButton;
MyPin.draggable = NO;
MyPin.highlighted = YES;
MyPin.animatesDrop = TRUE;
MyPin.canShowCallout = YES;


return MyPin;

}

//Show that the detailDisclosure Button has been pressed.

-(void)LondonClicked:(id)sender {
NSLog(@"London Clicked");
}
-(void)ParisClicked:(id)sender {
NSLog(@"Paris Clicked");
}
-(void)BrusselsClicked:(id)sender {
NSLog(@"Brussels Clicked");
}
-(void)BerlinClicked:(id)sender {
NSLog(@"Berlin Clicked");
}
-(void)MunichClicked:(id)sender {
NSLog(@"Munich Clicked");
}
-(void)ZurichClicked:(id)sender {
NSLog(@"Zurich Clicked");
}
-(void)MilanClicked:(id)sender {
NSLog(@"Milan Clicked");
}
-(void)MadridClicked:(id)sender {
NSLog(@"Madrid Clicked");
}
-(void)RomeClicked:(id)sender {
NSLog(@"Rome Clicked");
}
-(void)LisbonClicked:(id)sender {
NSLog(@"Lisbon Clicked");
}
-(void)ViennaClicked:(id)sender {
NSLog(@"Vienna Clicked");
}


- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}


@end

JSON文件示例.

{
"ID": "London",
"Link": "http://www.London.co.uk",
"ID": "Paris",
"Link": "http://www.Paris.fr"
}

非常感谢您的时间.

尼克.

推荐答案

首先，我建议将数据格式更改为以下形式:

First of all I'd suggest changing the format of your data to something like this:

{
   "london":{
      "link":"http://www.London.co.uk",
      "moredata":"..."
   },
   "paris":{
      "link":"http://www.Paris.fr",
      "moredata":"..."
   }
}

这将代表具有相关属性的城市.在您的版本中，无法找到特定城市的正确链接.

This will represent a city with it's associated properties. In your version it's impossible to lookup the right link for a specific city.

然后，您可以按以下方式解析和访问不同的部分:

Then you can parse and access the different parts as follows:

NSString *json = @"{\"london\":{\"link\":\"http://www.London.co.uk\",\"moredata\":\"...\"},\"paris\":{\"link\":\"http://www.Paris.fr\",\"moredata\":\"...\"}}";

NSData *data = [json dataUsingEncoding:NSUTF8StringEncoding];

NSError *error;

NSDictionary *cities = [NSJSONSerialization JSONObjectWithData:data options:nil error:&error];

NSLog(@"link to london: %@", cities[@"london"][@"link"]);

>> link to london: http://www.London.co.uk

此后，您必须使用提取的链接来填充Web视图.

After this You have to feed your webview with the extracted link.

这篇关于使用可能的JSON将自定义注释发送到webView吗?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！

09-02 17:57
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