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Questions tagged [nsinvocation]

An NSInvocation object contains all the elements of an Objective-C message: a target, a selector, arguments, and the return value. Each of these elements can be set directly, and the return value is set automatically when the NSInvocation object is dispatched.

Resource

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NSInvocation Leaks

I am trying to setup an NSInovcation system to launch selectors into background threads using performSelectorInBackground: - So far everything is successful when running the system on instance methods (-), but I also want to support class methods…
MikeyM
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Forwarding call to foreign -init method

Situation For a project of mine, I'm building some kind of extension. This extension must have a class that implements a method whose declaration is - (id)initWithBundle:(NSBundle *)bundle. Issue My extension has multiple classes, but the host app…
Perceval
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Calling an initialiser using NSInvocation

I have a scenario where the initialiser to use called after allocing an object is not known until runtime and I have no control over it. It also may have various arguments. So currently I'm doing this: ... id obj = [MyClass alloc]; …
drekka
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NSInvocation making app crash

I'm using NSInvocation as follows: In my init, I'm writing this in my viewDidLoad: SEL mySelector; mySelector = @selector(initParsersetId:type:); NSMethodSignature * sig = nil; sig = [[self class]…
neha
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NSInvocation object not getting allocated iphone sdk

I'm doing NSString *_type_ = @"report"; NSNumber *_id_ = [NSNumber numberWithInt:report.reportId]; NSDictionary *paramObj = [NSDictionary dictionaryWithObjectsAndKeys: _id_,…
neha
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addTarget fails for NSInvocation/invoke pair

I'm passing targets and actions to UIButtons from dictionary values. This works fine EXCEPT if I try and pass an NSInvocation/invoke pair. // |self| is a member of |MyClass|, which declares selector |test| NSDictionary *button1Data = @{…
Thompson
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NSUndoManager Delayed Argument Evaluation

I am trying to work with NSUndoManager's prepareWithInvocationTarget. I would like to have something like [[self.undoManager prepareWithInvocationTarget:self] doSomethingWithObject:[self.aMutableArray objectAtIndex:0]] where the argument of…
Joseph Johnston
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Is there a way to Make NSInvocation surport variable parmas function line [NSstring stringWithFormat:..]

Apple doc says "NSInvocation does not support invocations of methods with either variable numbers of arguments or union arguments. " i searched for hours ,some people says var_list works, but i tryed ,it does Not but I think there may be a way to…
cydiyo
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NSInvocation get target causing EXC_BAD_ACCESS

I have a weird problem with NSInvocation. I'm using it as a return callback when a network operation completes. Let me explain the previous sentence in more detail: I'm using a custom made network protocol which works over a TCP socket and I have a…
Majster
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objc variadic arguments with primary type and objects

I have a set of lower-layer api, as below: - (NSDictionary*) startRecord; - (NSDictionary*) stopRecord; - (NSDictionary*) switchMicrophone; - (NSDictionary*) enableAutoRecord:(BOOL)enable; - (NSDictionary*) deleteFile:(NSString*)filename; -…
Arton
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NSInvocation invoke giving bad access in iOS 8

I'm trying to run this code in iOS 8 but I'm getting a bad access error in the method called, this runs ok in iOS 7. Does anyone has a clue about this? -(double) calcularColumna:(int ) anio :(int) mes :(NSString * ) columna { NSInvocation *…
Rafael Jimeno
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NSInvocation to delay calling of method causing EXC_BAD_ACCESS

I'm trying to display a message at the end of a game that shows whether or not the player has won. Here is the relevant code: BOOL yes = YES; NSString *winMessage = [NSString stringWithFormat:@"You win!"]; NSInvocation *inv = [NSInvocation…
ASMach
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NSInvocation has retainArguments, why is there no releaseArguments?

NSInvocation has retainArguments to retain the arguments. Why is there no releaseArguments? Why will the retained arguments be freed?
Boon
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Does [NSInvocation invoke] block execution until done?

If I call invoke on NSInvocation, is it the same as calling performSelector: with the argument waitUntilDone:YES? That is, does invoke block the execution until the called selector is done? In other words, are the two following code lines exactly…
nyi
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iOS - Timer invocation issue

I wanted to invoke a method if the timer is expired, but the method does not get invoked. Not sure what is going wrong. Any suggestions? Being called: - (void)messageSendingReply:(id)messageID { //Do something. } Calling the above: -…
bllakjakk
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