User:Uroboro

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Revision as of 05:04, 30 January 2018 by Uroboro (talk | contribs) (Removed symlink instructions in favour of using $THEOS.)
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Find me on saurik's IRC server, Twitter, Reddit, Github, StackOverflow or send me an email.

Made UnlockEvents and FlipNC.

If you are looking for notifications within a process, give NotificationExplorer a look.

Some NIC templates here.

And a repository there: uroboro.github.io/repo.

DISCLAIMER: All code written in this page is to be considered experimental and untested. The author shall not be held responsible or liable for any undesired consequences, including, but not limited to, data loss, property damage, time travel, the singularity, suffered by you as a result of any error in such code. You also agree that you will not use these code snippets for any purposes prohibited by United States law, including, without limitation, the development, design, manufacture, or production of nuclear, missile, or chemical or biological weapons.

"Interesting" links

Hooking everything

While previously it was possible to provide no filter or an empty one, this is no longer the case, both by Cydia Substrate requiring one and not it being empty. So the solution is based on another requirement that is not very documented: Cydia Substrate will only hook binaries that are linked with Security.framework. The following filter will suffice for this purpose but please reduce the hooking target of your tweak as much as possible.

com.your.tweak.plist

Late hooking

UI usage

If you need to use UI elements, you have to wait until the application is ready.

Using callbacks

static void notificationCallback(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo) {
	// UI is available, use UIKit here
#if BEFORE_IOS_8
	UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Alert" 
		message:@"This is an alert." 
		delegate:nil 
		cancelButtonTitle:@"I'm ok with this" 
		otherButtonTitles:nil];
	[alert show];			
#else
	UIAlertController * alert = [UIAlertController alertControllerWithTitle:@"Alert"
		message:@"This is an alert."
		preferredStyle:UIAlertControllerStyleAlert];
	[alert addAction:[UIAlertAction actionWithTitle:@"I'm ok with this" 
		style:UIAlertActionStyleDefault
		handler:^(UIAlertAction * action) {}]];
	[[UIWindow keyWindow].rootViewController presentViewController:alert animated:YES completion:^{}];
#endif
}
 
static void * observer = NULL;

%ctor {
	CFNotificationCenterAddObserver(
		CFNotificationCenterGetLocalCenter(),
		&observer,
		notificationCallback,
		(CFStringRef)UIApplicationDidFinishLaunchingNotification,
		NULL,
		CFNotificationSuspensionBehaviorCoalesce
	);
}

// Remove observer upon unloading the dylib
%dtor {
	CFNotificationCenterRemoveObserver(
		CFNotificationCenterGetLocalCenter(),
		&observer,
		(CFStringRef)UIApplicationDidFinishLaunchingNotification,
		NULL
	);
}

Using blocks

static id observer;
%ctor {
	observer = [[NSNotificationCenter defaultCenter] addObserverForName:UIApplicationDidFinishLaunchingNotification
		object:nil queue:[NSOperationQueue mainQueue]
		usingBlock:^(NSNotification *notification) {
			// UI is available, use UIKit here
#if BEFORE_IOS_8
			UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Alert" 
				message:@"This is an alert." 
				delegate:nil 
				cancelButtonTitle:@"I'm ok with this" 
				otherButtonTitles:nil];
			[alert show];			
#else
			UIAlertController * alert = [UIAlertController alertControllerWithTitle:@"Alert"
				message:@"This is an alert."
				preferredStyle:UIAlertControllerStyleAlert];
			[alert addAction:[UIAlertAction actionWithTitle:@"I'm ok with this" 
				style:UIAlertActionStyleDefault
				handler:^(UIAlertAction * action) {}]];
			[[UIWindow keyWindow].rootViewController presentViewController:alert animated:YES completion:^{}];
#endif
		}
	];
}

// Remove observer upon unloading the dylib
%dtor {
	[[NSNotificationCenter defaultCenter] removeObserver:observer];
}

Dynamic bundle loading

Same applies if a class you want to hook is dynamically loaded by a bundle.

To do: read this and make this procedure more robust.

Using callbacks

static void notificationCallback(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo) {
	if ([((NSDictionary *)userInfo)[NSLoadedClasses] containsObject:@"targetClass"]) {
		// Target class has been loaded
	}
}
 
%ctor {
	CFNotificationCenterAddObserver(
		CFNotificationCenterGetLocalCenter(), NULL,
		notificationCallback,
		(CFStringRef)NSBundleDidLoadNotification,
		NULL, CFNotificationSuspensionBehaviorCoalesce);
}

Using blocks

static id observer;
%ctor {
	observer = [[NSNotificationCenter defaultCenter] addObserverForName:NSBundleDidLoadNotification
		object:nil queue:[NSOperationQueue mainQueue]
		usingBlock:^(NSNotification *notification) {
			if ([notification.userInfo[NSLoadedClasses] containsObject:@"targetClass"]) {
				// Target class has been loaded
			}
		}
	];
}

//if a destructor existed or you don't need to track the notification anymore
%dtor {
	[[NSNotificationCenter defaultCenter] removeObserver:observer];
}

Other Stuff

Similar Wanted Pages:

Inheritance hierarchy‏‎ MIG Subsystems
ApplicationScripting.framework/Inheritance hierarchy‏‎ ApplicationScripting.framework/MIG subsystem‏
AppSupport.framework/Inheritance hierarchy‏‎ AppSupport.framework/MIG subsystem
AudioToolbox.framework/Inheritance hierarchy ‏AudioToolbox.framework/MIG subsystem
AVFoundation.framework/Inheritance hierarchy‏ AVFoundation.framework/MIG subsystem
BackBoardServices.framework/Inheritance hierarchy‏ BackBoardServices.framework/MIG subsystem‏‎
‏BulletinBoard.framework/Inheritance hierarchy‏ ‏BulletinBoard.framework/MIG subsystem
ChatKit.framework/Inheritance hierarchy‏‎ ChatKit.framework/MIG subsystem‏
CoreFoundation.framework/Inheritance hierarchy‏‎ CoreFoundation.framework/MIG subsystem
CoreTelephony.framework/Inheritance hierarchy‏‎ CoreTelephony.framework/MIG subsystem
‏Foundation.frameworkInheritance hierarchy‏‎ ‏Foundation.framework/MIG subsystem
GraphicsServices.framework/Inheritance hierarchy‏‎ GraphicsServices.framework/MIG subsystem
IH boilerplate/Inheritance hierarchy‏‎ IH boilerplate/MIG subsystem‏‎
IOKit.framework/Inheritance hierarchy‏‎ IOKit.framework/MIG subsystem
IOSurface.framework/Inheritance hierarchy ‏IOSurface.framework/MIG subsystem
MapKit.framework/Inheritance hierarchy MapKit.framework/MIG subsystem
Message.framework/Inheritance hierarchy ‏Message.framework/MIG subsystem
QuartzCore.framework/Inheritance hierarchy QuartzCore.framework/MIG subsystem
Preferences.app/Inheritance hierarchy‏ ‏Preferences.app/MIG subsystem
Preferences.framework/Inheritance hierarchy Preferences.framework/MIG subsystem
SpringBoard.app/Inheritance hierarchy SpringBoard.app/MIG subsystem
SpringBoardServices.framework/Inheritance hierarchy‏ SpringBoardServices.framework/MIG subsystem
TelephonyUI.framework/Inheritance hierarchy TelephonyUI.framework/MIG subsystem
UIKit.framework/Inheritance hierarchy UIKit.framework/MIG subsystem
WiFiPicker.servicebundle/Inheritance hierarchy ‏WiFiPicker.servicebundle/MIG subsystem‏

Test Zone

Wondering what looks better:

To "wikitable"...

com.your.tweak.plist
NeXTSTEP style XML style
{
	entry = {
		cell = PSSwitchCell;
		defaults = "com.your.tweak";
		label = "Your Tweak";
		key = enabled;
		default = 1;
		icon = "/Applications/Preferences.app/icon-table@2x.png";
		PostNotification = "com.your.tweak/preferences.changed";
	};
}
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>entry</key>
	<dict>
		<key>cell</key>
		<string>PSSwitchCell</string>
		<key>defaults</key>
		<string>com.your.tweak</string>
		<key>label</key>
		<string>Your Tweak</string>
		<key>key</key>
		<string>enabled</string>
		<key>default</key>
		<true/>
		<key>icon</key>
		<string>/Applications/Preferences.app/icon-table@2x.png</string>
		<key>PostNotification</key>
		<string>com.your.tweak/preferences.changed</string>
	</dict>
</dict>
</plist>

or not to "wikitable"...

com.your.tweak.plist
NeXTSTEP style XML style
{
	entry = {
		cell = PSSwitchCell;
		defaults = "com.your.tweak";
		label = "Your Tweak";
		key = enabled;
		default = 1;
		icon = "/Applications/Preferences.app/icon-table@2x.png";
		PostNotification = "com.your.tweak/preferences.changed";
	};
}
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>entry</key>
	<dict>
		<key>cell</key>
		<string>PSSwitchCell</string>
		<key>defaults</key>
		<string>com.your.tweak</string>
		<key>label</key>
		<string>Your Tweak</string>
		<key>key</key>
		<string>enabled</string>
		<key>default</key>
		<true/>
		<key>icon</key>
		<string>/Applications/Preferences.app/icon-table@2x.png</string>
		<key>PostNotification</key>
		<string>com.your.tweak/preferences.changed</string>
	</dict>
</dict>
</plist>

Maybe collapsing?

com.your.tweak.plist