![]() ![]() Protocols are exposed as empty objects in JavaScript. Protocols in Objective-C are like interfaces in other languages - they are blueprints of what members a class should contain, a sort of an API contract. More information on how NativeScript deals with Objective-C classes is available here. The conversion is automatically handled by NativeScript. On the other hand, any API that expects a NSNull, NSNumber, NSString or NSDate instance in Objective-C can be called either with a wrapper object or a JavaScript value - null, number or boolean, string or Date, in JavaScript. This applies for all methods on NSNull, NSNumber, NSString and NSDate returning instancetype. This means that a call to NSString.stringWithString whose return type in Objective-C is instancetype will return a wrapper around an NSString instance, rather than a JavaScript string. The exception to this are the methods on those classes declared as returning instancetype - init methods and factory methods. ![]() This means that instances of these classes won't be exposed in JavaScript via a wrapper exotic object, instead they will be converted to the equivalent JavaScript data type: NSNull becomes null, NSNumber becomes number or boolean, NSString becomes string and NSDate becomes Date. NativeScript considers instances of NSNull, NSNumber, NSString and NSDate to be "primitives". For further info, check out CGFloat's documentation. The return value for the pointer size will be 4 bytes for 32-bit architectures and 8 bytes - for 64-bit ones. A straightforward way to verify the device/emulator architecture is to check the pointer size via interop.sizeof(). On 32-bit devices, we need to use Float32Array and Float64Array - on 64-bit ones. Keep in mind that CGFloat is architecture dependent. Every JavaScript constructor function created to expose an Objective-C class is arranged in a prototype chain that mirrors the class hierarchy in Objective-C: if NSMutableArray extends NSArray, which in turn extends NSObject in Objective-C, then in JavaScript the prototype of the NSObject constructor function is the prototype of NSArray, which in turn is the prototype of NSMutableArray. ![]() This means that each static method on an Objective-C class becomes a function on its JavaScript constructor function, each instance method becomes a function on the JavaScript prototype, and each property becomes a property descriptor on the same prototype. NativeScript exposes an Objective-C class and its members as a JavaScript constructor function with an associated prototype according to the prototypal inheritance model. Classes can have instance or static methods, and properties which are always instance. The most common data type in Objective-C by far is the class. ![]() The following is a thorough but not exhaustive list of rules and exceptions NativeScript abides by when exposing Objective-C APIs in JavaScript. NativeScript tries to translate idioms between languages, but there are quirks and features in both that are hard to reconcile. However, the rules that govern this conversion need to take into account the differences between JavaScript and Objective-C. NativeScript for iOS handles the conversion between JavaScript and Objective-C data types implicitly. Ns clean ns run ios - no-hmr Marshalling # iOS Marshalling # AppCompatActivity Create ExampleCrypto.h file with the following content: } from NativeClass ( ) JavaProxy ( '' ) class Activity extends androidx. ![]()
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