我的应用程序目前正在使用Yelp服务API，并返回Yelp客户端提供的相关数据的键值对。我的场景是，我有一个Attractions视图控制器，它掉落不同类别的pin注释，例如"亚洲食品"等。当你点击大头针注释并点击callout它会带你到一个细节视图控制器。
这里是我做的:
func mapView(mapView: MKMapView!, annotationView view: MKAnnotationView!, calloutAccessoryControlTapped control: UIControl!) {
if (control == view.rightCalloutAccessoryView) {
let selectedLocation = view.annotation;
let selectedCoordinate = view.annotation.coordinate;
var latitude = selectedCoordinate.latitude
var longitude = selectedCoordinate.longitude
var location:CLLocation = CLLocation(latitude: latitude, longitude: longitude)
let businessPlacemark = MKPlacemark(coordinate: selectedCoordinate, addressDictionary: nil)
indicatedMapItem = selectedCoordinate;
performSegueWithIdentifier("attractionToDetail", sender: self);
}
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
var attractionsDetailViewController:AttractionsDetailViewController = segue.destinationViewController as! AttractionsDetailViewController
attractionsDetailViewController.attractionLocation = indicatedMapItem;
}
下面是我的API服务调用:
class func searchWithQueryWithRadius(map: MKMapView, term: String, deal: Bool, radius: Int, sort: Int, categories: String, completion: ([Resturant]!, NSError!) -> Void) {
YelpClient.sharedInstance.searchWithTerm(term, deal: false, radius: radius, sort: sort,categories: categories, success: { (operation: AFHTTPRequestOperation!, response: AnyObject!) -> Void in
let responseInfo = response as! NSDictionary
resultQueryDictionary = responseInfo
println(responseInfo)
let dataArray = responseInfo["businesses"] as! NSArray
for business in dataArray {
let obj = business as! NSDictionary
var yelpBusinessMock: YelpBusiness = YelpBusiness(dictionary: obj)
var annotation = MKPointAnnotation()
annotation.coordinate = yelpBusinessMock.location.coordinate
annotation.title = yelpBusinessMock.name
map.addAnnotation(annotation)
}
}) { (operation: AFHTTPRequestOperation!, error: NSError!) -> Void in
println(error)
}
}
当我查询西雅图地区的Asian Food时，打印到日志中的数据如下:
{
businesses = (
{
categories = (
(
Korean,
korean
),
(
Buffets,
buffets
)
);
"display_phone" = "+1-206-854-3166";
distance = "124.9692597772704";
id = "ummas-lunch-box-seattle";
"image_url" = "http://s3-media2.fl.yelpcdn.com/bphoto/QqrpImnPywZ9zc721RVRrg/ms.jpg";
"is_claimed" = 1;
"is_closed" = 0;
location = {
address = (
"1301 5th Ave",
Concourse
);
city = Seattle;
coordinate = {
latitude = "47.6088937";
longitude = "-122.3342613";
};
"country_code" = US;
"cross_streets" = "Union St & University St";
"display_address" = (
"1301 5th Ave",
Concourse,
Downtown,
"Seattle, WA 98101"
);
"geo_accuracy" = "9.5";
neighborhoods = (
Downtown
);
"postal_code" = 98101;
"state_code" = WA;
};
"mobile_url" = "http://m.yelp.com/biz/ummas-lunch-box-seattle";
name = "Umma's Lunch Box";
phone = 2068543166;
rating = "4.5";
"rating_img_url" = "http://s3-media2.fl.yelpcdn.com/assets/2/www/img/99493c12711e/ico/stars/v1/stars_4_half.png";
"rating_img_url_large" = "http://s3-media4.fl.yelpcdn.com/assets/2/www/img/9f83790ff7f6/ico/stars/v1/stars_large_4_half.png";
"rating_img_url_small" = "http://s3-media2.fl.yelpcdn.com/assets/2/www/img/a5221e66bc70/ico/stars/v1/stars_small_4_half.png";
"review_count" = 155;
"snippet_image_url" = "http://s3-media1.fl.yelpcdn.com/photo/H1UEaGpAztTzFIDKbsx_UA/ms.jpg";
"snippet_text" = "Korean comfort food at an affordable price. My only wish is that they are opened longer..nnI'm sure that everybody here has already written about it, but it...";
url = "http://www.yelp.com/biz/ummas-lunch-box-seattle";
}
我要做的就是简单地提取yelp响应数据，并将我在DetailViewController中的AddressLabel文本设置为来自yelp数据的地址(因为reverseGeoCoding有小错误)。
目前我正在使用我创建的这个YelpBusiness.swift，但我不确定它是否正确…
var dictionary: NSDictionary
init(dictionary: NSDictionary) {
self.dictionary = dictionary
}
var business: String {
get {
return self.dictionary["businesses"] as! String
}
}
var name: String {
get {
return self.dictionary["name"] as! String
}
}
var phone: String {
get {
return self.dictionary["phone"] as! String
}
}
var rating: String {
get {
return self.dictionary["rating"] as! String
}
}
var imageURL: NSURL? {
get {
if let image = self.dictionary["image_url"] as? String {
return NSURL(string: image.stringByReplacingOccurrencesOfString("ms.jpg", withString: "ls.jpg", options: nil, range: nil))
}
return nil
}
}
var ratingImageURL: NSURL {
get {
return NSURL(string: self.dictionary["rating_img_url_large"] as! String)!
}
}
var reviewCount: Int {
get {
return self.dictionary["review_count"] as! Int
}
}
var deals: Array<AnyObject>? {
get {
if let deals = self.dictionary["deals"] as? Array<AnyObject> {
return deals
}
return nil
}
}
var latitude: Double? {
get {
if let location = self.dictionary["location"] as? NSDictionary {
if let coordinate = location["coordinate"] as? NSDictionary {
return (coordinate["latitude"] as! Double)
}
}
return nil
}
}
var longitude: Double? {
get {
if let location = self.dictionary["location"] as? NSDictionary {
if let coordinate = location["coordinate"] as? NSDictionary {
return (coordinate["longitude"] as! Double)
}
}
return nil
}
}
var location: CLLocation {
get {
return CLLocation(latitude: self.latitude!, longitude: self.longitude!)
}
}
var shortAddress: String {
get {
if let location = self.dictionary["location"] as? NSDictionary {
if let address = location["address"] as? Array<String> {
if let neighborhoods = location["neighborhoods"] as? Array<String> {
return ", ".join(address + [neighborhoods[0]])
}
return ", ".join(address)
}
}
return ""
}
}
var displayAddress: String {
get {
if let location = self.dictionary["location"] as? NSDictionary {
if let address = location["display_address"] as? Array<String> {
return ", ".join(address)
}
}
return ""
}
}
var displayCategories: String {
get {
if let categories = self.dictionary["categories"] as? Array<Array<String>> {
return ", ".join(categories.map({ $0[0] }))
}
return ""
}
}
谢谢!
新答案
因为你在使用NSDictionary &NSArray对象，你可以使用神奇的valueForKeyPath:
// I HIGHLY recommend a more descriptive variable name instead of "obj"
let obj = business as! NSDictionary
let displayAddressArray = obj.valueForKeyPath("location.display_address") as NSArray
if displayAddressArray.count > 0
{
annotation.title = "(displayAddressArray[0])n(displayAddressArray[1])n"
}
你可能可以根据你想要的样子重新格式化注释。
更多信息，加上本地快速嵌套字典访问，可以在这篇有用的文章中找到，我刚刚在看。
原始回答
如果我正确理解你的问题，并假设YelpBusiness对象匹配我在这个github repo中看到的内容，你需要做的可能就像改变这一行一样简单:
annotation.title = yelpBusinessMock.name
:
annotation.title = yelpBusinessMock.location.display_address