oc 和 h5中js 的交互
来源:互联网 发布:数据库应用系统饭店 编辑:程序博客网 时间:2024/06/10 01:32
最近项目中要用到html5来实现,涉及到OC调用JS,以及JS调用OC的方法,这里把遇到的问题以及实现方法介绍一下。
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- #import <UIKit/UIKit.h>
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- @interface ViewController : UIViewController <UIWebViewDelegate>
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- @property (weak, nonatomic) IBOutlet UIButton *oc_call_js_no_params;
- @property (weak, nonatomic) IBOutlet UIButton *oc_call_js_has_params;
- @property (weak, nonatomic) IBOutlet UIWebView *mWebView;
- @property (weak, nonatomic) IBOutlet UILabel *js_call_oc_show;
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- - (IBAction)ocCallJsNoParams:(id)sender;
- - (IBAction)ocCallJsHasParams:(id)sender;
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- @end
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- #import "ViewController.h"
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- @interface ViewController ()
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- @end
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- @implementation ViewController
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- - (void)viewDidLoad {
- [super viewDidLoad];
- _mWebView.delegate = self;
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- NSString *path = [[NSBundle mainBundle] pathForResource:@"index" ofType:@"html"];
- [self.mWebView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath: path]]];
- }
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- - (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
- NSString *urlstr = request.URL.absoluteString;
- NSRange range = [urlstr rangeOfString:@"ios://jwzhangjie"];
- if (range.length!=0) {
- _js_call_oc_show.text = [NSString stringWithFormat:@"请访问地址:%@", urlstr];
- }
- return YES;
- }
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- -(void)webView:(nonnull UIWebView *)webView didFailLoadWithError:(nullable NSError *)error{
- NSLog(@"加载失败");
- }
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- -(void)webViewDidStartLoad:(nonnull UIWebView *)webView{
- NSLog(@"开始加载");
- }
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- -(void)webViewDidFinishLoad:(nonnull UIWebView *)webView{
- NSLog(@"开始结束");
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- }
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- - (void)didReceiveMemoryWarning {
- [super didReceiveMemoryWarning];
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- }
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- - (IBAction)ocCallJsNoParams:(id)sender {
- NSString *js = [NSString stringWithFormat:@"ocCallJsNoParamsFunction();"];
- [self.mWebView stringByEvaluatingJavaScriptFromString:js];
- }
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- - (IBAction)ocCallJsHasParams:(id)sender {
- NSString *js = [NSString stringWithFormat:@"ocCallJsHasParamsFunction('%@','%@');",@"jwzhangjie",@"http://jwzhangjie.cn"];
- [self.mWebView stringByEvaluatingJavaScriptFromString:js];
- }
- @end
- function ocCallJsNoParamsFunction()
- {
- alert("OC调用JS中的无参方法");
- var e = document.getElementById("js_shouw_text");
- e.options.add(new Option("OC调用JS中的无参方法", 2));
- }
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- function ocCallJsHasParamsFunction(name, url)
- {
- alert(name+"的博客地址为:"+url);
- var e = document.getElementById("js_shouw_text");
- e.options.add(new Option("OC调用JS中的有参方法", 2));
- }
- <!DOCTYPE html>
- <html lang="zh-CN">
- <head>
- <meta charset="utf-8">
- <title>OC与JS互相调用</title>
- </head>
- <body>
- <div >
- <select id="js_shouw_text">
- <option>
- 展示OC调用JS无参数
- </option>
- </select>
- </div>
- <div>
- <BR/>
- <input type="button" value="JS调用OC方法" onclick="js_call_oc()"/>
- </div>
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- <script type="text/javascript" src="test.js" charset="UTF-8"></script>
- <script type="text/javascript">
- function js_call_oc()
- {
- var iFrame;
- iFrame = document.createElement("iframe");
- iFrame.setAttribute("src", "ios://jwzhangjie");
- iFrame.setAttribute("style", "display:none;");
- iFrame.setAttribute("height", "0px");
- iFrame.setAttribute("width", "0px");
- iFrame.setAttribute("frameborder", "0");
- document.body.appendChild(iFrame);
- // 发起请求后这个iFrame就没用了,所以把它从dom上移除掉
- iFrame.parentNode.removeChild(iFrame);
- iFrame = null;
- }
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- </script>
- </body>
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- </html>
规避1:对于OC去调用JS内容最好在webViewDidFinishLoad方法里或者之后规避2:在html里面引用js或者css的时候src不要带有路径,因为安装后文件都在同级目录下面
规避3:OC调用JS的规范
- NSString *js = [NSString stringWithFormat:@"ocCallJsHasParamsFunction('%@','%@');",@"jwzhangjie",@"http://jwzhangjie.cn"];
- [self.mWebView stringByEvaluatingJavaScriptFromString:js];
规避4:JS调用OC,这里通过html里面发送一个请求,然后在ios中使用shouldStartLoadWithRequest拦截请求,根据请求url的不同进行处理。
- function js_call_oc()
- {
- var iFrame;
- iFrame = document.createElement("iframe");
- iFrame.setAttribute("src", "ios://jwzhangjie");
- iFrame.setAttribute("style", "display:none;");
- iFrame.setAttribute("height", "0px");
- iFrame.setAttribute("width", "0px");
- iFrame.setAttribute("frameborder", "0");
- document.body.appendChild(iFrame);
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- iFrame.parentNode.removeChild(iFrame);
- iFrame = null;
- }
- - (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
- NSString *urlstr = request.URL.absoluteString;
- NSRange range = [urlstr rangeOfString:@"ios://jwzhangjie"];
- if (range.length!=0) {
- _js_call_oc_show.text = [NSString stringWithFormat:@"请访问地址:%@", urlstr];
- }
- return YES;
- }
源码地址:http://jwzhangjie.cn/forum.php?mod=viewthread&tid=3&page=1&extra=#pid3
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