C is not Swift. You’ll be happier if you structure your switch statements using curly braces round all of the cases interiors, like this: The extra level of curly braces allows you to do things you can’t do otherwise.
When you define a variable outside the scope of a function, that variable’s value is actually written into your executable file. This means you can only use a constant value. Since you don’t know everything about the runtime environment at compile time (which classes are available, what is their structure, etc.), you cannot create objective … Read more
The compiler simply interprets this as calling printf with two strings as arguments (but see Zack’s comment). This happens at compile time (i.e. the compiler does this): The strings (“%%%s” and “hello”) are copied directly into the executable, the compiler leaves them as-is. This happens at runtime (i.e. the C standard library does this when the app is running): … Read more
iMonkey looks like an interesting way of embedding a JS runtime in an iOS app, but I can’t find any examples on how to actually run some JS code. I can build/link the lib, include the jsapi.h header (from the src directory), but it trips over various linker errors (‘undefined symbol for architecture…’) when I try … Read more
As a comment said this error is likely to be deep in your code. If the culprit is a zombie, the easiest way to find it is to run it (preferably in the latest Xcode, currently Xcode 5, as it has been improved) in profiler and choose “Zombies”. When it fails, you can see the … Read more
nil is the literal null value for Objective-C objects, corresponding to the abstract type id or any Objective-C type declared via @interface. For instance: Nil is the literal null value for Objective-C classes, corresponding to the type Class. Since most code doesn’t need variables to reference classes, its use is not common. One example is: NULL is the literal null value for … Read more
It looks like you’re not memory managing the view controller properly and it is being deallocated at some point – which causes the numberButtonClicked: method to be sent to another object that is now occupying the memory that the view controller was previously occupying… Make sure you’re properly retaining/releasing your view controller.
i was facing same issue today in xcode 8 version 8.3.2 right click on issue –> reveal in log then you are able to check what is causing that issue
i was facing same issue today in xcode 8 version 8.3.2 right click on issue –> reveal in log
It looks like you are missing including the IOBluetooth.framework in your project. You can add it by: Clicking on your project in the upper left of the left pane (the blue icon). In the middle pane, click on the Build Phases tab. Under “Link Binary With Libraries”, click on the plus button. Find the IOBluetooth.framework … Read more