Objective-C 開啓 Google Map App 並帶入經緯度查詢

Jie的懶教學，來教大家用 Objective-C 開啓 Google Map App 並帶入經緯度查詢：

//檢查有無安裝google map
if([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"comgooglemaps://"]]){        
//開啓Google Map App
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:[NSString stringWithFormat:@"comgooglemaps://?saddr=%f,%f&daddr=%f,%f&directionsmode=walking",起點latitude,起點longitude,終點latitude,終點longitude]]];
    }else{
//開啟網頁版Google Map(太簡單，略)
}

其他進一步設定可以參考：https://developers.google.com/maps/documentation/ios/urlscheme?hl=zh-TW 

完工，爆肝。