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源码请点击github地址下载。
下面讲述实现OC和JS的交互,它们相互调用,其中需要写一个静态的HTML文件用于提供JS方法。
不说闲话,看代码如下
function postStr(string) {
return ‘I am the return parameter JS, and param ‘ + string;
}
NSString *str = [self.webView stringByEvaluatingJavaScriptFromString:@"postStr(‘ocToJs‘)"];
//输出str为I am the return parameter JS, and param ocToJs,正式js中postStr方法的返回值。
需注意的是正确书写@"postStr(‘ocToJs‘)"的格式,postStr为js方法,ocToJs是OC传递给JS的参数。
<button onclick="jsCallOCClicked()">
<h1>jsCallOC</h1>
</button>
在js文件的jsCallOCClicked()方法中去调用OC的jsCallToOC()方法
function jsCallOCClicked() {
window.location.href = "objc://jsCallToOC#param#github地址#param#https://github.com/SoftProgramLX/OcAndJs";
}
说明:
1.“objc://”为自定义的OC识别JS调用的标识
2.“jsCallToOC”为需调用的OC方法
3.“#param#”为自定义的方法与参数或参数与参数的分隔符
4.“github地址”为js传递给OC的第一个参数
5.“https://github.com/SoftProgramLX/OcAndJs”为js传递给OC的第二个参数
实现OC的jsCallToOC()方法
- (void)jsCallToOC:(NSArray *)params
{
dataArr = params;
alertV = [[UIAlertView alloc] initWithTitle:@"js已经调用了OC方法" message:@"查看控制台的信息,点击取消会再触发OC调用js" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
alertV.tag = 9666;
[alertV show];
NSLog(@"js调用OC返回值:%@", params);
}
这里params[0]输出是github地址,params[1]输出是https://github.com/SoftProgramLX/OcAndJs
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
NSString *path = [[request URL] absoluteString];
if ([[UIDevice currentDevice].systemVersion doubleValue] >= 7.0) {
path = [path stringByRemovingPercentEncoding];
}else{
path = [path stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
}
if ([path hasPrefix:@"ios"]||[path hasPrefix:@"objc"]) {
NSString *method = [path substringFromIndex:@"objc://".length];
NSArray *sels = [method componentsSeparatedByString:@"#param#"];
SEL todoM;
if (sels.count>1) {
todoM = NSSelectorFromString([NSString stringWithFormat:@"%@:",sels[0]]);
NSMutableArray *params = [NSMutableArray array];
for (int i=1; i<sels.count; i++) {
[params addObject:sels[i]];
}
if ([self respondsToSelector:todoM]) {
[self performSelector:todoM withObject:params afterDelay:0];
}
}else if(sels.count==1){
todoM = NSSelectorFromString([NSString stringWithString:sels[0]]);
if ([self respondsToSelector:todoM]) {
[self performSelector:todoM withObject:nil afterDelay:0];
}
}
return NO;
}
return YES;
}
说明:<br>
这里判断sels.count>1的目的是判断有无传参<br>
若无参数则定义方法- (void)jsCallToOC;<br>
若有参数则定义方法- (void)jsCallToOC:(NSArray *)params。
- (void)deletePrompt
{
[self.webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.style.webkitUserSelect=‘none‘;"];
[self.webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.style.webkitTouchCallout=‘none‘;"];
}
- (void)jsStatistics
{
NSString *systemUserAgent = [self.webView stringByEvaluatingJavaScriptFromString:@"navigator.userAgent"];
if (!([systemUserAgent rangeOfString:@"****-app-iphone Version/"].length > 0)) {
NSString *currentVersion = [NSBundle mainBundle].infoDictionary[(__bridge NSString *)kCFBundleVersionKey];
systemUserAgent = [systemUserAgent stringByAppendingFormat:@" ***-app-iphone Version/%@", currentVersion];
}
NSDictionary *dictionary = [[NSDictionary alloc] initWithObjectsAndKeys:systemUserAgent, @"UserAgent", nil];
[[NSUserDefaults standardUserDefaults] registerDefaults:dictionary];
}
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原文地址:http://www.cnblogs.com/li-Xu/p/5742458.html