[UIApplication canOpenURL]
Returns whether an application can open a given URL resource.
- (BOOL)canOpenURL:(NSURL *)url
Parameters
- url
- A URL object that identifies a given resource. The URL’s scheme—possibly a custom scheme—identifies which application can handle the URL.
Return Value of [UIApplication canOpenURL]
NO if no application is available that will accept the URL; otherwise, returns YES.Discussion of [UIApplication canOpenURL]
This method guarantees that that if
openURL: is called, another application will be launched to handle it. It does not guarantee that the full URL is valid.
Example of [UIApplication canOpenURL]
NSString *wazeAppURL = @"waze://";
NSString *mapsAppURL = @"maps://";
BOOL canOpenURL = [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:wazeAppURL]];
NSString *url = canOpenURL ? wazeAppURL : mapsAppURL;
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];
Example of [UIApplication canOpenURL]
if ([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"cydia://"]])
{
NSLog(@"cydia installed");
}
else
{
NSLog(@"cydia not installed");
}
Example of [UIApplication canOpenURL]
BOOL canOpenURL = [[UIApplication sharedApplication]
canOpenURL:[NSURL URLWithString:@"app://"]];
if ( canOpenURL ) [[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];