OC与JS交互

WebView 和Native交互

Method parameters must be objects or

basic data types like int and float. Objective-C objects will be

converted to their JavaScript equivalents by WebKit:

NSNumber objects will be converted to JavaScript numbers.

NSString objects will be converted to JavaScript strings.

NSArray objects will be mapped to special read-only arrays.

NSNull will be converted to JavaScript’s null.

All other objects will be wrapped by WebKit into appropriate objects for the JavaScript environment.

1 call JS的方法

Js中有方法：function addImage(image, width, height) { … }

Native有两种方式call

1.1

id win = [webView windowScriptObject];

NSArray *args = [NSArray arrayWithObjects:

@”sample_graphic.jpg”,

[NSNumber numberWithInt:320],

[NSNumber numberWithInt:240],

nil];

[win callWebScriptMethod:@"addImage"

withArguments:args];

1.2

[win evaluateWebScript:

@"addImage(’sample_graphic.jpg’, ‘320’, ‘240’)”];

参考：https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/DisplayWebContent/Tasks/JavaScriptFromObjC.html

2 js回调native的方法

2.1 Structures and non object pointers will not be passed to JavaScript.

参考：

https://developer.apple.com/library/content/documentation/AppleApplications/Conceptual/SafariJSProgTopics/ObjCFromJavaScript.html#//apple_ref/doc/uid/30001215-BBCBFJCD

https://developer.apple.com/reference/webkit?language=objc

http://www.cnblogs.com/yueyuanyueyuan/p/5651266.html

JavaScriptCore源码地址

https://opensource.apple.com/source/JavaScriptCore/

https://chromium.googlesource.com/external/WebKit_trimmed/+/HEAD/Source/JavaScriptCore/API

—Open Source:

macgap

参考文章：

http://www.cnblogs.com/yueyuanyueyuan/p/5651266.html

http://www.jianshu.com/p/939db6215436

http://www.jianshu.com/p/0042d8eb67c0