use*_*486 8 javascript objective-c ios javascriptcore ios7
我正在webview中加载一个url,其中包含HTML和javascript函数调用.现在我正在研究用户触摸webview中的提交按钮时它应该调用viewController中的任何方法.Webview应该加载url(webview委托)是一种方法,但有任何新的方法来获取知道什么时候webview调用javascript函数应该通知viewcontroller或触发视图控制器中的任何方法.
我不是在寻找这个我们需要的解决方案
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
NSLog(@"passed data from web view : %@",[[request URL] query]);
if([[[request URL] query] isEqualToString:@"clickedOnLineNo"])
{
//Do your action here
}
我们必须从你的javascript方法导航到假URL,比如
window.location = "someLink://yourApp/form_Submitted:param1:param2:param3";
点击按钮或您需要的操作.
但JavaScriptCore是否有任何新的可能性来实现同样的目标.
Mik*_*ike 21
iOS 7中引入的JavascriptCore框架中的Objective-C接口允许从Javascript调用Objective-C方法.有关这些功能的详细介绍,请参阅Apple开发者网络上的2013 WWDC简介"将JavaScript集成到本机应用程序"会话:https://developer.apple.com/videos/wwdc/2013/？id = 615
它确实在WebView上有一个简短的部分(MacO不是iOS)
下面的示例代码显示了如何实现iOS所需的功能.
- (void)viewDidLoad
{
[super viewDidLoad];
UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(0,40,320,320)];
webView.delegate = self;
[self.view addSubview:webView];
NSString *pageSource = @"<!DOCTYPE html> <html> <head> </head> <body> <h1>My Mobile App</h1> <p>Please enter the Details</p> <form name=\"feedback\" method=\"post\" action=\"mailto:you@site.com\"> <!-- Form elements will go in here --> </form> <form name=\"inputform\"> <input type=\"button\" onClick=\"submitButton('My Test Parameter')\" value=\"submit\"> </form> </body> </html>";
[webView loadHTMLString:pageSource baseURL:nil];
}
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
JSContext *context = [webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"]; // Undocumented access
context[@"submitButton"] = ^(NSString *param1) {
[self yourObjectiveCMethod:param1];
};
}
- (void)yourObjectiveCMethod:(NSString *)param1 {
NSLog(@"User clicked submit. param1=%@", param1);
}
注意事项:
.
Objective-C type | JavaScript type
--------------------+---------------------
nil | undefined
NSNull | null
NSString | string
NSNumber | number, boolean
NSDictionary | Object object
NSArray | Array object
NSDate | Date object
NSBlock * | Function object *
id ** | Wrapper object **
Class *** | Constructor object ***
* Instances of NSBlock with supported arguments types will be presented to
JavaScript as a callable Function object. For more information on supported
argument types see JSExport.h. If a JavaScript Function originating from an
Objective-C block is converted back to an Objective-C object the block will
be returned. All other JavaScript functions will be converted in the same
manner as a JavaScript object of type Object.
** For Objective-C instances that do not derive from the set of types listed
above, a wrapper object to provide a retaining handle to the Objective-C
instance from JavaScript. For more information on these wrapper objects, see
JSExport.h. When a JavaScript wrapper object is converted back to Objective-C
the Objective-C instance being retained by the wrapper is returned.
*** For Objective-C Class objects a constructor object containing exported
class methods will be returned. See JSExport.h for more information on
constructor objects.
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