首先在- (void)webViewDidFinishLoad:(UIWebView *)webView方法中获取cookie并保存:

- (void)webViewDidFinishLoad:(UIWebView *)webView{

//保存cookie

// 将获取的cookie储存在沙盒中（ 通过 [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie: cookies]来保存cookies，但是我发现，即使这样设置之后再app退出之后，该cookies还是丢失了（其实是cookies过期的问题)

NSArray *nCookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];

NSHTTPCookie *cookie;

for (id c in nCookies)

{

if ([c isKindOfClass:[NSHTTPCookie class]])

{

cookie=(NSHTTPCookie *)c;

if ([cookie.name isEqualToString:@"PHPSESSID"]) {

NSNumber *sessionOnly = [NSNumber numberWithBool:cookie.sessionOnly];

NSNumber *isSecure = [NSNumber numberWithBool:cookie.isSecure];

NSArray *cookies = [NSArray arrayWithObjects:cookie.name, cookie.value, sessionOnly, cookie.domain, cookie.path, isSecure, nil];

[[NSUserDefaults standardUserDefaults] setObject:cookies forKey:@"cookie"];

break;

}

}

}

}

之后在loadRequest请求之前设置cookie,就会自动登录了:

- (void)createWkWebView{

_webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 64, SCREEN_WIDTH, SCREEN_HEIGHT-64-49)];

_webView.backgroundColor = [UIColor whiteColor];

[self.view addSubview:_webView];

self.webView = _webView;

_webView.delegate = self;

//获取cookie

if ([[[[NSUserDefaults standardUserDefaults]dictionaryRepresentation]allKeys]containsObject:@"cookie"]) {

//获取cookies：程序起来之后，uiwebview加载url之前获取保存好的cookies，并设置cookies，

NSArray *cookies =[[NSUserDefaults standardUserDefaults]  objectForKey:@"cookie"];

NSMutableDictionary *cookieProperties = [NSMutableDictionary dictionary];

[cookieProperties setObject:[cookies objectAtIndex:0] forKey:NSHTTPCookieName];

[cookieProperties setObject:[cookies objectAtIndex:1] forKey:NSHTTPCookieValue];

[cookieProperties setObject:[cookies objectAtIndex:3] forKey:NSHTTPCookieDomain];

[cookieProperties setObject:[cookies objectAtIndex:4] forKey:NSHTTPCookiePath];

NSHTTPCookie *cookieuser = [NSHTTPCookie cookieWithProperties:cookieProperties];

[[NSHTTPCookieStorage sharedHTTPCookieStorage]  setCookie:cookieuser];

}

[_webView loadRequest:.........];

}