JavascriptCore块的变量参数列表

Question

我想在JavascriptCore上下文中定义一个函数,它接受可变数量的参数.

像这样的东西:

JSVirtualMachine* virtualMachine = [[JSVirtualMachine alloc] init];
JSContext* ctx = [[JSContext alloc] initWithVirtualMachine:virtualMachine];

ctx[@"func"] = ^(JSValue* value, ...){
    va_list args;
    va_start(args, value);
    for (JSValue *arg = value; arg != nil; arg = va_arg(args, JSValue*)) {
        NSLog( @"%@", arg);
    }
    va_end(args);
};

[ctx evaluateScript:@"func('arg1', 'arg2');"];

我相信JSC包装器不会将第二个参数传递给块,因为va_list在记录第一个参数后迭代崩溃.

我也尝试过这个NSArray*惯例,它不起作用.

这有可能吗？

Answer 1

来自JSContext.h:

// This method may be called from within an Objective-C block or method invoked
// as a callback from JavaScript to retrieve the callback's arguments, objects
// in the returned array are instances of JSValue. Outside of a callback from
// JavaScript this method will return nil.
+ (NSArray *)currentArguments;

通向以下内容:

ctx[@"func"] = ^{
    NSArray *args = [JSContext currentArguments];
    for (JSValue *arg in args) {
        NSLog( @"%@", arg);
    }
};

[ctx evaluateScript:@"func('arg1', 'arg2');"];