The Objective-C runtime ISA pointer is defined as such: union isa_t { isa_t() { } isa_t(uintptr_t value) : bits(value) { } uintptr_t bits; private: // Accessing the class requires ...

How to round double value in objective c if the value is 1.66 it show value to 1.55 there is missing a point value which makes a difference if the calculations are higher ? self.priceLabel.text = [...

I am developing an app that requires previewing and printing of the document. I am able to preview it but not able to print it. PS: I searched on the web and found that there is a method printwithinfo,...

I have to zipped an encrypted file by using many zipped pod file like ZipArchive ,SSZipArchive etc.The simple sqlite file has been zipped by using ZipArchive but the file that is encrypted using ...

I have Network layer class, which has method with URL request. Seems like this: - (void)networkRequestWithError:(NSError *__strong *)responseError andCompletion:(void (^)(NSData*))...

I am using Buildbox for my game. I implemented custom rewarded ads. The problem is that game music continues when rewarded video is open. I want to mute and unmute after video is watched. I know Java ...

I am trying to do a task which I am completely not aware of, that is video uploading to server in objective c. I am a beginner and I was using swift, but now my requirement is in objective c. Here I ...

My app requires to run a timer in the background continuously when an app is in the background and it should stop when app gets into the foreground. The app is built with React Native and it doesn't ...

I'm using protobuf 2.6.1 with this plugin which I compiled myself. In the project I'm working with Protobuf models are already present. I tried to regenerate the files using the following command: ...

What are the two implicit parameters passed to every method by an object in Objective-c? Is it _cmd and id?

I am trying create an NSArray which holds the datatype of serialized files i will be loading from disk. It can say double, int, or some custom type, and then I will need to load those files and cast ...

How to fetch and display the message in push notification from dynamic notification service push: { aps = { alert = "My First Notification"; sound = default; Msg = { ...

I am trying to send a JSON to websocket. the required format is coming up with commas whereas when i add item to dictionary then its creating a semi-colon. Required Format : {"key":"...

Whenever I am passing an argument of Objective C type A to my function then everything is alright: - (void) f:(id<A>)argument However, when it's an array of the same object type, Xcode requires ...

I would like to define a C struct-like in my Objective-C header file which includes _ivars only, however, since this a header file only there would be no corresponding @implementation. Is that even ...