一、场景描述
产品需求是移动端app要调用h5页面，然后监听h5代码中的某个方法，最终执行h5中的具体代码。
二、具体代码
.m文件
@interface ViewController ()<UIWebViewDelegate>
@property(nonatomic,strong) UIWebView *webView;
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// 初始化
UIWebView *webView = [[UIWebView alloc] init];
webView.bounds = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height-44);
webView.delegate = self;
NSString *path = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"html"];
NSURL *url = [NSURL fileURLWithPath:path];
// 加载资源
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[webView loadRequest:request];
[self.view addSubview:webView];
self.webView = webView;
}
#pragma mark - UIWebViewDelegate
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
// 解析html方法，具体事件根据h5要求提供
NSString *string = [self.webView stringByEvaluatingJavaScriptFromString:@"alert();"];
NSLog(@"%@",string);
}test.html资源文件
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<title>OC调用JS点击方法</title>
</head>
<body>
<input type="button" value="js点击事件" onclick="js_to_oc_click()"/>
<script type="text/javascript">
function alert(){
return "我被成功调起来了";
}
</script>
</body>
</html>