How to map XML (objects) to the method in Objective-C?

< br />


 
 
 
 
 
 
 
 
 
 
 
 < br /> 

@interface CalculatorActions: NSObject

// Property
@property (strong, nonatomic) NSString* actionScript;

// Actions
- (void)enterFirstOperand:(double)operand;

- (void)enterSecondOperand:(double)operand;< br />
- (void)selectOperator:(NSString*)operator;

- (void)clickCalculate;

// Validations

-(void)validateResult:(NSString*)exptectedResult;

@end

@interface CalculatorActions

[ Action("addOperand", "Enter first operand")]
- (void) addOperand:(double)operand1 ToOther:(double)operand2;

SEL mySelector = NSSelectorFromString(@"testAddFunction");
Class MyClass = NSClassFromString(@"CalculatorActions");
NSString *myArgument = @"5";

NSInvocation *myInvocation = [NSInvocation invocationWithMethodSignature:[MyClass instanceMethodSignatureForSelector:mySelector]];
 [invocation setTarget:myClass];
[invocation setSelector:mySelector];
[invocation setArgument:&myArgument atIndex:2];
[invocation invoke];

I have an xml file containing a structure. In this structure, I have an Actions node. Therefore, Under the Actions node, there are multiple “Action” nodes, and each node has Value and Name attributes.

For example

What I want to do is; I want to map these operations to the methods I implemented in Objective-C.

For example, I have a class called “CalculatorActions” and define 5 methods. I want to map my actions in xml (text format) to the methods I created in CalculatorActions.

For example

@interface CalculatorActions: NSObject

// Property
@property (strong, nonatomic) NSString* actionScript;
< br />// Actions
- (void)enterFirstOperand:(double)operand;

- (void)enterSecondOperand:(double)operand;

- ( void)selectOperator:(NSString*)operator;

- (void)clickCa lculate;

// Validations

-(void)validateResult:(NSString*)exptectedResult;

@end

So when I read the xml file, I want to map the operations in the xml file to the corresponding methods in the class.

I think what I am looking for is this;

@interface CalculatorActions

[Action("addOperand", "Enter first operand")]
- (void) addOperand:(double)operand1 ToOther:(double )operand2;

What is the best way?

You can create NSInvocation instances, set selectors, parameters, and optionally capture the return value. You can create all of them using strings.

< /p>

For example

SEL mySelector = NSSelectorFromString(@"testAddFunction");
Class MyClass = NSClassFromString(@"CalculatorActions");
NSString *myArgument = @"5";

NSInvocation *myInvocation = [NSInvocation invocationWithMethodSignature:[MyClass instanceMethodSignatureForSelector:mySelector]];
[invocation setTarget:myClass];
[ invocation setSelector:mySelector];
[invocation setArgument:&myArgument atIndex:2];
[invocation invoke];

Note – setArgument: the selector accepts the pointer address, and the parameter index starts from 2 Start.