我们在封装网页的时候经常会遇到需要往网页里面的控件添加数据，但是怎么添加又成了难点。本人最近在开发的时候就遇到这样的事,解决之后，来和大家分享一下。
//以必应网站为例
[web loadRequest:
[NSURLRequestrequestWithURL:
[NSURL URLWithString:@"http://www.bing.com/?FORM=Z9FD1"]]];
以下就是主要代码，只有几句
//获取当前页面的title
NSString *title =
[webView
stringByEvaluatingJavaScriptFromString:
@"document.title"];
NSLog(@"title====%@",title);
//获取当前URL
NSString *URL =
[webView
stringByEvaluatingJavaScriptFromString: @"document.location.href"];
NSLog(@"URL===%@",URL);
//得到网页代码
NSString *html =
[webView
stringByEvaluatingJavaScriptFromString:
@"document.documentElement.innerHTML" ];
NSLog(@"html====%@",html);
//拼接字符串 根据网页name找到控价并赋值
NSString *str = @"随_的简书";
NSString *JSStr =
[NSString stringWithFormat:
@"document.getElementsByName('q')[0].value = ('%@');",str];
[webView stringByEvaluatingJavaScriptFromString: JSStr];
以下是全部代码，commit+c commit+v可以直接运行
@interface ViewController ()
@property (weak, nonatomic) UIWebView *web;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
UIWebView *web =
[[UIWebView alloc] initWithFrame:
[UIScreen mainScreen].bounds];
UIButton *back =
[[UIButton alloc] initWithFrame:CGRectMake
(0, 0, self.view.frame.size.width,self.view.frame.size.width / 7.5)];
[back setBackgroundColor: [UIColor orangeColor]];
[back setTitle:@"back" forState:UIControlStateNormal];
[back addTarget:self
action: @selector(back)
forControlEvents:UIControlEventTouchUpInside];
//以必应为例
[web loadRequest:
[NSURLRequest requestWithURL:
[NSURL URLWithString:
@"http://www.bing.com/?FORM=Z9FD1"]]];
web.delegate = self;
web.scalesPageToFit =YES;
web.scrollView.delegate = self;
self.web = web;
[self.view addSubview:web];
[self.view addSubview:back];
}
#pragma mark ---Delegate
-(void) webViewDidStartLoad:
(UIWebView *)webView{
NSLog(@"开始加载－－－") ;
}
- (void) webViewDidFinishLoad:
(UIWebView *)webView {
NSLog(@"加载完成－－－");
//获取当前页面的title
NSString *title =
[webView
stringByEvaluatingJavaScriptFromString:
@"document.title"];
NSLog(@"title====%@",title);
//获取当前URL
NSString *URL =
[webView
stringByEvaluatingJavaScriptFromString:
@"document.location.href"];
NSLog(@"URL===%@",URL);
//得到网页代码
NSString *html =
[webView
stringByEvaluatingJavaScriptFromString:
@"document.documentElement.innerHTML" ];
NSLog(@"html====%@",html);
//拼接字符串 根据网页name找到控价并赋值
NSString *str = @"随_的简书";
NSString *JSStr =
[NSString stringWithFormat:
@"document.getElementsByName('q')[0].value = ('%@');",str];
[webView stringByEvaluatingJavaScriptFromString:JSStr];
}
- (void) webView:
(UIWebView *)webView
didFailLoadWithError:(NSError *)error {
NSLog(@"加载失败＝＝＝%@",error);
}
//当网页位置为顶部 不允许继续下拉
- (void) scrollViewDidScroll:
(UIScrollView *)scrollView {
if (self.web.frame.origin.y == 0) {
self.web.scrollView.bounces = NO;
return;
}
}
//webView的每次页面跳转都会执行，在这里可以得到想要的数据
- (BOOL)webView:
(UIWebView *)webView
shouldStartLoadWithRequest:(NSURLRequest *)request
navigationType:(UIWebViewNavigationType)navigationType {
NSLog(@"页面跳转");
return YES;
}
//返回
- (void) back {
[self.web goBack];
}