https://github.com/wilddylan/dljavascript

Study JavaScriptCore And JavaScript
https://github.com/wilddylan/dljavascript

Last synced: about 2 months ago
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Study JavaScriptCore And JavaScript

• Host: GitHub
• URL: https://github.com/wilddylan/dljavascript
• Owner: wilddylan
• License: mit
• Created: 2015-04-21T15:54:23.000Z (about 11 years ago)
• Default Branch: master
• Last Pushed: 2015-04-21T15:57:29.000Z (about 11 years ago)
• Last Synced: 2025-01-29T00:25:34.293Z (over 1 year ago)
• Size: 117 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# DLJavaScript

Study JavaScriptCore And JavaScript

```objective-c

// 创建新的Context

    JSContext * context = [[JSContext alloc] init];

    

    // 执行JS 代码

    [context evaluateScript:@"var num = 5 + 5"];

    [context evaluateScript:@"var names = ['Grace', 'Ada', 'Margaret']"];

    [context evaluateScript:@"var triple = function(value) { return value * 3 }"];

    

    // 直接执行JS代码 并且得到返回结果, 也可以先取到值、再去CallWithArgument或者拿出数组中的数据

    JSValue * tripleNum = [context evaluateScript:@"triple(num)"];

    

    NSLog(@"%d", [tripleNum toInt32]);

    

    // 得到JS里边的一些值、

    JSValue *names = context[@"names"];

    // 从值中取出数据

    JSValue *initialName = names[0];

    

    NSLog(@"The first name: %@", [initialName toString]);

    

    // 得到JS中的一个方法

    JSValue *tripleFunction = context[@"triple"];

    // 使用一个参数 传入到方法中

    JSValue *result = [tripleFunction callWithArguments:@[@5] ];

    

    NSLog(@"Five tripled: %d", [result toInt32]);

    

    // 异常通过JSValue的方式抛出、

    [context setExceptionHandler:^(JSContext * context, JSValue * exception) {

       

        NSLog(@"JS Error: %@", exception);

    }];

    

    // 执行一句错误的JS代码、 以便我们抛出异常

    [context evaluateScript:@"function multiply(value1, value2) { return value1 * value2 "];

    

    // Throw exception

    NSArray * array = [NSArray arrayWithObjects:@"1", @"2", nil];

    @try {

        

        NSInteger excep = [array[5] integerValue] + [array[10] integerValue];

        NSLog(@"%ld", excep);

    }

    @catch (NSException *exception) {

        @throw exception;

    }

    @finally {

        

    }

```

`Let's Fix Bug...`