点击网页的按钮: 利用block的方式
JSContext *context = [self.yaoWebView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];
WEAKSELF
context[@"invite"] = ^() {
NSLog(@"+++++++Begin Log+++++++");
NSArray *args = [JSContext currentArguments];
for (JSValue *jsVal in args) {
NSLog(@"JSJS%@", jsVal);
// NSString *jsonStr = [NSString stringWithFormat:@"%@",jsVal];
// NSDictionary * dic = [weakSelf dictionaryWithJsonString:jsonStr];
JSValue *this = [JSContext currentThis];
NSLog(@"this: %@",this);
NSLog(@"-------End Log-------");
};
invite,这个就是网页(后台)要的方法名.具体原理后续再补充.
OC给JS传值
[ weakSelf.logicView.pickUpWebV stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"update(%@)",numStr]];
这个方法调用时机:应该在webview 请求完成后再调用 js 方法,这里才能用stringByEvaluatingJavaScriptFromString,因为
要等页面加载完,页面没加载完就相当于有些对象不一定创建成功,那么用js时候就容易找不到对象
下边无关,请无视
json转字典
- (NSDictionary *)dictionaryWithJsonString:(NSString *)jsonString {
if (jsonString == nil) {
return nil;
}
NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
NSError *err;
NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:jsonData
options:NSJSONReadingMutableContainers
error:&err];
if(err) {
NSLog(@"json解析失败：%@",err);
return nil;
}
return dic;
}
扩展知识:
