Syntax

1. // canOpenURL method verifies if there is any app which can handle indicated URL scheme.
2. // Swift

UIApplication.sharedApplication().canOpenURL(_ aUrl: NSURL)

1. // Objective-C

[[UIApplication sharedApplication] canOpenURL:(NSURL *)aUrl];

1. // openURL method tries to open a resource located by URL. YES/true if it was opened otherwise NO/false.
2. // Swift

UIApplication.sharedApplication().openURL(_ aUrl: NSURL)

1. // Objective-C

[[UIApplication sharedApplication] openURL:(NSURL *)aUrl];

Parameters

Parameter | Meaning |

—— | —— | aUrl | a NSURL instance which stores a built-in or custom scheme string|

Remarks

In iOS9 and above your app must list any URL schemes it will want to query. This is done by adding LSApplicationQueriesSchemes to Info.plist

iOS has built-in support for the tel, http/https ,sms, mailto, facetime schemes. It also supports http–based URLs for Youtube, Maps and iTunes apps.

Examples of built-in URL schemes:

tel: tel://123456890 or tel:123456890