#import "ViewController.h"@interface ViewController ()<UIScrollViewDelegate>  //保包括这个viewdelegat协议          @property (weak, nonatomic) IBOutlet UITextField *search;   //这是输入框@property (weak, nonatomic) IBOutlet UIWebView *viewbrows; // 这个是浏览器界面视图@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];     //初始化载入    }- (IBAction)go:(id)sender {    NSString *path =self.search.text;   //字符串指针指向输入的文本    //[path stringByAddingPercentEscapesUsingEncoding:(NSStringEncoding)]//这个应该是转换代码格式            if (![path hasPrefix:@"http://"]) {        //表示判断path前缀是否是http://                                                             path=[@"http://" stringByAppendingString:path];        没有则添加http://在path前面    }                                                            NSURL *url =[NSURL URLWithString:path];             //用url指针指向字符串格式的url path         NSURLRequest *request =[NSURLRequest requestWithURL:url];   request请求指向url    [self.viewbrows loadRequest:request];                                   载入请求的url    [self.view endEditing:YES];                                //当使徒运行完成后键盘会缩回}- (IBAction)went:(id)sender {    [self.viewbrows goForward];          //前进}- (IBAction)back:(id)sender {    [self.viewbrows goBack];            //后退}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end