IPC to SpringBoard isn't needed

[kirb]

The restrictions are implemented within -[LSApplicationWorkspace isApplicationAvailableToOpenURL:error:], which otherwise just calls [LSApplicationWorkspace applicationsAvailableForHandlingURLScheme:] and returns YES if there's at least one result.

cy# [UIApp canOpenURL:[NSURL URLWithString:@"twitter:"]]
false
cy# [[LSApplicationWorkspace defaultWorkspace] applicationsAvailableForHandlingURLScheme:@"twitter"]
@[#"<LSApplicationProxy: 0x180cb1e0> com.atebits.Tweetie2"]

[r-plus]

oh nice. I'll change to that way directly in ActivityAction(I'm using this for it).

[r-plus]

BTW, runtime automatically link to MobileCoreServices.framework launch timing even if app developer not link to it?

[kirb]

UIKit links against MobileCoreServices:

$ otool -L ~/sdks/sim/iPhoneSimulator9.0.sdk/System/Library/Frameworks/UIKit.framework/UIKit | grep mobilecoreservices -
grep: warning: recursive search of stdin
(standard input):29:    /System/Library/Frameworks/MobileCoreServices.framework/MobileCoreServices (compatibility version 1.0.0, current version 727.5.3)

[r-plus]

Wow gotcha! Thanks for quick reply.

[malhal]

Yep this package isn't needed, this worked for me inside my tweak:

@interface LSApplicationWorkspace
- (BOOL)isApplicationAvailableToOpenURL:(id)arg1 error:(id*)arg2;
@end

static IMP original_LSApplicationWorkspace_isApplicationAvailableToOpenURL_error;
static BOOL replaced_LSApplicationWorkspace_isApplicationAvailableToOpenURL_error(LSApplicationWorkspace* self, SEL sel, NSError** error){
    return YES; // allows all URLs.
}

...

    Class $LSApplicationWorkspace(objc_getClass("LSApplicationWorkspace"));
    MSHookMessageEx($LSApplicationWorkspace, @selector(isApplicationAvailableToOpenURL:error:), (IMP)replaced_LSApplicationWorkspace_isApplicationAvailableToOpenURL_error,& original_LSApplicationWorkspace_isApplicationAvailableToOpenURL_error);

[kirb]

This seems necessary on iOS 11 now. Pretty much all of LSApplicationWorkspace, LSApplicationProxy, etc. is restricted.

[malhal]

When they restrict something sometimes there is an entitlement that can enable it again.