打开谷歌地图巴士方向 [英] open google maps to bus directions

问题描述

  NSString * urlString => 
 
我知道您可以通过执行下列操作来打开Goog​​le地图应用程序， @ http://maps.google.com/maps?saddr=London+UK&daddr=Birmingham+UK; 
 [[UIApplication sharedApplication] openURL：[NSURL URLWithString：urlString]]; 
  

但是有一个参数可以自动切换到总线方向吗？ Apple的开发者文档似乎没有提及任何有关它的内容：

$ b

https://developer.apple.com/iphone/library/featuredarticles/iPhoneURLScheme_Reference/Articles/MapLinks.html#//apple_ref / doc / uid / TP40007894

解决方案

From

>

dirflg = h - 打开避开高速公路
路线寻找模式。 b路线查找模式。

dirflg = r - 打开公共交通 - 仅适用于某些区域。

dirflg = d - 切换到驾驶
方向。

>

所以你的网址：

  NSString * urlString = @http：// maps.google.com/maps?saddr=London+UK&daddr=Birmingham+UK; 
  

成为：

  NSString * urlString = @http://maps.google.com/maps?saddr=London+UK&daddr=Birmingham+UK&dirflg=r; 
  

N.B。支持公共交通路线类型的数据并不总是可用的。我尝试了您在样本中使用的区域（伦敦，伯明翰），发现它不被支持。

I realise that you can open the google maps app ready for directions by doing something like this:

NSString* urlString = @"http://maps.google.com/maps?saddr=London+UK&daddr=Birmingham+UK";
[[UIApplication sharedApplication] openURL:[NSURL URLWithString: urlString]];

But is there a parameter I can add to automatically switch to bus directions? Apple's developer document doesn't seem to mention anything about it:

https://developer.apple.com/iphone/library/featuredarticles/iPhoneURLScheme_Reference/Articles/MapLinks.html#//apple_ref/doc/uid/TP40007894

解决方案

From MapKiWiki:

dirflg Route type:

• dirflg=h - Switches on "Avoid Highways" route finding mode.
• dirflg=t - Switches on "Avoid Tolls" route finding mode.
• dirflg=r - Switches on "Public Transit" - only works in some areas.
• dirflg=w - Switches to walking directions - still in beta.
• dirflg=d - Switches to driving directions.

So your URL:

NSString* urlString = @"http://maps.google.com/maps?saddr=London+UK&daddr=Birmingham+UK";

Becomes:

NSString* urlString = @"http://maps.google.com/maps?saddr=London+UK&daddr=Birmingham+UK&dirflg=r";

N.B. The data supporting public transit route types are not always available. I tried the area you used in your sample (London, Birmingham) and found it was not supported.

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