地圖導航ios（url）

   //騰訊

    NSString * tencentAddressUrl = [[NSStringstringWithFormat:@"qqmap://map/routeplan?type=walk&from=%@&to=%@&policy=1&referer=%@",mb.start, mb.end,_appName]stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSetURLQueryAllowedCharacterSet]];

    //蘋果

    NSString *appleAddressUrl = [[NSStringstringWithFormat:@"http://maps.apple.com/?saddr=%@&daddr=%@&dirflg=w",_start, mb.end] stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSetURLQueryAllowedCharacterSet]];

    //百度

    NSString *baiduAddressUrl = [[NSStringstringWithFormat:@"baidumap://map/direction?origin=%@&destination=%@&mode=walking&region=%@&src=%@",mb.start, mb.end,_city,_appName]stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSetURLQueryAllowedCharacterSet]];

    //高德

    NSString *gaodeAddressUrl = [[NSStringstringWithFormat:@"iosamap://path?sourceApplication=%@&sid=BGVIS1&sname=%@&did=BGVIS2&dname=%@&dev=0&m=2&t=2",_appName,mb.start,mb.end]stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSetURLQueryAllowedCharacterSet]];

    //谷歌

    NSString *googleAddressUrl = [[NSStringstringWithFormat:@"comgooglemaps://?x-source=%@&x-success=%@&saddr=%@&daddr=%@&directionsmode=bicycling",_appName,_urlScheme,mb.start, mb.end] stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSetURLQueryAllowedCharacterSet]];

//跳轉到應用外地圖導航

 [[UIApplicationsharedApplication] openURL:[NSURLURLWithString:urlString]];