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昨天写了Swift和JS的交互，既然写了就把OC的也写了出来：
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
#import "webView.h"
#import //系统支持库
@protocol JSObjcDelegate //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
@interface webView ()//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
@implementation webView
-(instancetype)initWithFrame:(CGRect)frame url:(NSURL *)url{
self = [super initWithFrame:frame];
if (self) {
NSURLRequest *request = [NSURLRequest requestWithURL:url];
self.delegate = self;
[self loadRequest:request];
}
return self;
}
-(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
这里是每次请求的时候都进行设定，所以方法写在了web开始加载的方法里面
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
NSDictionary *dic = @{@"TOKEN":[DEFAULTS objectForKey:@"token"],@"UID":[DEFAULTS objectForKey:@"userID"]};
[dic enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
// 设定 cookie
NSHTTPCookie *cookie = [NSHTTPCookie cookieWithProperties:
[NSDictionary dictionaryWithObjectsAndKeys:
[request.URL host], NSHTTPCookieDomain,
[request.URL path], NSHTTPCookiePath,
key,NSHTTPCookieName,
obj,NSHTTPCookieValue,
nil]];
[[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];
// NSLog(@"cookie = %@",cookie);
}];
return YES;
}
同样是写在了webview开始加载的方法里面
-(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];
}else if(![[DEFAULTS objectForKey:@"city"] isEqualToString:request.allHTTPHeaderFields[@"CITY"]]) {
[mutableRequest setValue:[DEFAULTS objectForKey:@"city"] forHTTPHeaderField:@"CITY"];
request = [mutableRequest copy];
[self loadRequest:request];
}
return YES;
}
