DLIntrospection
Simple NSObject-category wrapper for <objc/runtime.h> for methods/ivars/protocols/etc. listing. Automatically (often) resolves return types and argument types.
Usage
Type the following commands in LLDB command promt:~ po [NSObject classes]
...
UIDateLabel,
UIDatePicker,
UIDatePickerContentView,
UIDevice,
UIDictationMeterView,
UIDictationPhrase
...
Lets list UIDevice instance methods:
~ po [[UIDevice class] instanceMethods]
...
- (BOOL)isMediaPicker,
- (void)setIsMediaPicker:(BOOL)arg0 ,
- (id)systemVersion,
- (void)_unregisterForSystemSounds:(id)arg0 ,
- (void)_registerForSystemSounds:(id)arg0
...
Or instance variables:
~ po [[UIDevice class] instanceVariables]
int _numDeviceOrientationObservers,
float _batteryLevel
What properties (including private, of course) implements UIViewController?
~ po [[UIDevice class] properties]
@property (nonatomic, assign, readonly) BOOL _useSheetRotation,
@property (nonatomic, copy) @? afterAppearanceBlock,
...
@property (nonatomic, assign) {CGSize=ff} contentSizeForViewInPopover,
@property (nonatomic, assign, getter=isInAnimatedVCTransition) BOOL inAnimatedVCTransition,
@property (nonatomic, assign, readonly) BOOL inExplicitAppearanceTransition
What protocols implements NSData?
po [NSData protocols]
NSCopying,
NSMutableCopying,
NSSecureCoding <NSCoding>
Even cooler, let's see at protocol information (lists @required, @optional methods and @properties):
NSLog(@"%@", [NSObject descriptionForProtocol:@protocol(NSObject)]);
"@required" = (
"- (void)debugDescription",
"- (void)zone",
"- (void)performSelector:withObject:withObject:",
"- (void)description",
...
"- (void)performSelector:",
"- (void)performSelector:withObject:",
"- (void)self",
"- (void)conformsToProtocol:",
"- (void)class"
);
Bindings:
There also exists an OCaml binding so you can play use the code
interactively with the utop repl, see
here under the
Introspect module.
Known issues:
- Not all argument types are handled yet (structs, bitmasks);
- return and arguments types of protocol methods are not parsed yet.