通过 WebScriptObject 将 Cocoa 对象暴露给 JS 脚本环境
我看到有几个类似的问题，但这是一个更基本的问题。
我试图通过 WebScriptObject 向 WebView 公开一个简单的 Cocoa 对象，希望允许页面向 Cocoa 对象发送消息。关于此的文档非常清楚，但由于某种原因我无法让它工作。想知道您是否愿意看一下...
这是我正在加载到脚本环境中的对象。
@interface Client : NSObject {
NSString *test;
}
@implementation Client
- (id)init {
self = [super init];
test = [[NSString alloc] initWithString:@"Hey Simon"];
return self;
}
- (NSString *)test {
return test;
}
然后我在 WebView 的 FrameLoad 委托中加载该对象，其中：
- (void)webView:(WebView *)webView didClearWindowObject:(WebScriptObject *)windowObject forFrame:(WebFrame *)frame {
Client *_client = [[Client alloc] init];
[windowObject setValue:_client forKey:@"client"];
}
在 JS 方面，我只是做了一些非常基本的事情：
if( 'client' in window ) {
var client = window.client;
console.log( '---' );
console.log( 'client.test(): ' + client.test() );
console.log( '---' );
}
JS 控制台显示 TypeError: 表达式 'client.test' [undefined] 的结果不是 a功能。
有几件事。我知道该对象正在正确加载到脚本环境中，因为它不会通过条件加上我可以看到以下描述：
console.log( 'Client object: ' + client )
但我只是不知道如何正确公开我的可可方法。看看我上面所说的，我在类中实现方法或在 JS 中调用它们的方式是否存在问题？
提前致谢， 亚历克
I see there are a couple of similar questions, but this is a bit more basic.
I am trying to expose a simple Cocoa object via WebScriptObject to a WebView, hopefully allowing the page to send messages to the Cocoa object. The documentation on this is very clear, but for some reason I can't get it to work. Wondering if you'll have a look...
Here is the Object that I'm loading into the scripting environment.
@interface Client : NSObject {
NSString *test;
}
@implementation Client
- (id)init {
self = [super init];
test = [[NSString alloc] initWithString:@"Hey Simon"];
return self;
}
- (NSString *)test {
return test;
}
Then I'm loading that object in the WebView's frameLoad delegate, with:
- (void)webView:(WebView *)webView didClearWindowObject:(WebScriptObject *)windowObject forFrame:(WebFrame *)frame {
Client *_client = [[Client alloc] init];
[windowObject setValue:_client forKey:@"client"];
}
On the JS side of things, I am just doing something really basic:
if( 'client' in window ) {
var client = window.client;
console.log( '---' );
console.log( 'client.test(): ' + client.test() );
console.log( '---' );
}
The JS console says TypeError: Result of expression 'client.test' [undefined] is not a function.
A couple of things. I know the object is being loaded into the scripting environment properly because it wouldn't pass the conditional plus I can see a description with:
console.log( 'Client object: ' + client )
But I just don't know how to expose my cocoa methods properly. Looking at what I've said above, is there some problem with how I am implementing the methods in my class, or calling them in JS?
Thanks in advance,
Alec
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它就在文档中。 :(
您必须在传入的对象上实现 + (BOOL)isSelectorExcludedFromWebScript:(SEL)aSelector 。
所以就我而言，我必须编写
It was right there in the docs. :(
You have to implement + (BOOL)isSelectorExcludedFromWebScript:(SEL)aSelector on the object you are passing in.
So in my case, I had to write