帶有URL方案的Google地圖？

Question

我正在嘗試使用Google地圖獲取方向。 我下面這個鏈接 https://developers.google.com/maps/documentation/ios-sdk/urlscheme?hl=en

和代碼：

if ([[UIApplication sharedApplication] canOpenURL: 
     [NSURL URLWithString:@"comgooglemaps://"]]) { 
     NSString *temp=@"comgooglemaps://?saddr=Google+Inc,+8th+Avenue,+New+York,+NY&daddr=John+F.+Kennedy+International+Airport,+Van+Wyck+Expressway,+Jamaica,+New+York&directionsmode=transit"; 

     [[UIApplication sharedApplication] openURL: 
     [NSURL URLWithString:temp]]; 
    } else { 
     NSLog(@"Can't use comgooglemaps://"); 
    } 

地圖沒有打開，我得到：

Installation[2918:1295695] -canOpenURL: failed for URL: "comgooglemaps://" - error: "(null)"

是什麼問題？我錯過了什麼？

我想從我的應用程序顯示谷歌地圖。從這裏取

Answer 1

In iOS 9 you must whitelist any URL schemes your App wants to query in Info.plist under the LSApplicationQueriesSchemes key (an array of strings):

報價http://useyourloaf.com/blog/querying-url-schemes-with-canopenurl.html

Answer 2

確保谷歌地圖應用程序安裝在您的設備進行函數調用，否則canOpenURL之前：函數將返回null。