Cocoa中的分布式对象

Question

我试图在我的应用程序中跨两个进程提供一个对象。然而，当我测试我的代码时，接收vended对象的进程只是阻塞。我或多或少遵循了http://www.mikeash.com/pyblog/friday-qa-2009-02-20-the-good-and-bad-of-distributed-objects.html上的示例代码。

下面是我的两个进程的代码：

/*
 * Description: Vends an object that the receiver can then access
 *              through the distributed object.
 */

#import <Cocoa/Cocoa.h>
#import <iostream>

using namespace std;

int main() {
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    cout << "Starting vendor " << endl;

    NSMutableArray *mutable_array;
    [mutable_array addObject:@"Louis Lang"];
    [mutable_array addObject:@"John Doe"];

    NSConnection *connection = [NSConnection connectionWithReceivePort:[NSPort port] sendPort:nil];
    [connection setRootObject:mutable_array];
    [connection registerName:@"com.example.whatever"];

    [[NSRunLoop currentRunLoop] run];


    [pool drain];

    return 0;
}

和“接收者”

/*
 * Description: Receives the vended object from the server
 *
 */

#import <Cocoa/Cocoa.h>
#import <iostream>

using namespace std;

int main() {
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    cout << "Starting receiver." << endl;

    id theObject = (id)[NSConnection rootProxyForConnectionWithRegisteredName:@"com.example.whatever" host:nil];

    int the_count = [theObject count];

    NSLog(@"There are %i items in mutable_array", the_count);

    [pool drain];

    return 0;
}

Answer 1

你的代码看起来很不错，至少是分布式对象的一部分。但是：

NSMutableArray* mutable_array = [[NSMutableArray alloc] init];
[mutable_array addObject:@"Louis Lang"];
[mutable_array addObject:@"John Doe"];

我想肯定会有帮助的。

如果你使用的是Xcode 4.4+，下面的代码也可以：

NSArray* array = @[ @"Louis Lang", @"John Doe" ];