第一部分：webview与Js的交互
第二部分：设定cookie
第三部分：修改header头
一.webview与Js的交互
#import"webView.h"#import//系统支持库
@protocolJSObjcDelegate//定义web与JS交互的协议
-(void)goToNextActivity:(NSString*)urlStr;//JS需要调用的方法，参数可有可无，根据需要设定
@end
@interfacewebView()//遵守协议
@property(nonatomic,strong)JSContext * jsContext;//创建JSContext对象 我把它当作上下文对象，用于连接JS和OC
@end
@implementationwebView
-(instancetype)initWithFrame:(CGRect)frame url:(NSURL*)url{
self= [superinitWithFrame:frame];
if(self) {
NSURLRequest*request = [NSURLRequestrequestWithURL:url];
self.delegate=self;
[selfloadRequest:request];
}returnself;
}
-(void)webViewDidFinishLoad:(UIWebView*)webView{
self.jsContext= [webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];self.jsContext[@"myObj"] =self;//这里把self赋值给self.jsContext的myObj对象，那么在JS中就可以通过myObj调用oc方法了
self.jsContext.exceptionHandler= ^(JSContext *context, JSValue *exceptionValue) {
context.exception= exceptionValue;NSLog(@"异常信息：%@", exceptionValue);
};
}//webview调用方法-(void)goToNextActivity:(NSString*)urlStr{NSLog(@"goToNextActivity str:%@",urlStr);
}@end
第二部分：设定cookie
- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType{NSDictionary*dic = @{@"TOKEN":[DEFAULTS objectForKey:@"token"],@"UID":[DEFAULTS objectForKey:@"userID"]};
[dic enumerateKeysAndObjectsUsingBlock:^(idkey,idobj,BOOL*stop) {// 设定 cookieNSHTTPCookie *cookie = [NSHTTPCookie cookieWithProperties:
[NSDictionarydictionaryWithObjectsAndKeys:
[request.URLhost], NSHTTPCookieDomain,
[request.URLpath], NSHTTPCookiePath,
key,NSHTTPCookieName,
obj,NSHTTPCookieValue,nil]];
[[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];// NSLog(@"cookie = %@",cookie);}];returnYES;
}
第三部分：修改header头
-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
NSMutableURLRequest *mutableRequest = [request mutableCopy];
//这里加了一些判断，避免死循环，因为修改完成后webview需要重新加载request （其中DEFAULTS 是NSUserDefaults存了一些后台程序返回的内容）if(!request.allHTTPHeaderFields[@"CITY"]) {
[mutableRequest addValue:[DEFAULTS objectForKey:@"city"] forHTTPHeaderField:@"CITY"];
[self loadRequest:request];
}elseif(![[DEFAULTS objectForKey:@"city"] isEqualToString:request.allHTTPHeaderFields[@"CITY"]]) {
[mutableRequest setValue:[DEFAULTS objectForKey:@"city"] forHTTPHeaderField:@"CITY"];
request = [mutableRequest copy];
[self loadRequest:request];
}returnYES;
}
转载地址：http://blog.csdn.net/create_pro/article/details/60140245
