//  ViewController.m//  12-掌握-webView#import "ViewController.h"@interface ViewController () <UIWebViewDelegate>@property (weak, nonatomic) IBOutlet UIWebView *webView;@property (weak, nonatomic) IBOutlet UIBarButtonItem *backItem;@property (weak, nonatomic) IBOutlet UIBarButtonItem *forward;@end@implementation ViewController- (IBAction)back:(id)sender {    [self.webView goBack];}- (IBAction)forward:(id)sender {    [self.webView goForward];}- (IBAction)refresh:(id)sender {    [self.webView reload];}- (void)viewDidLoad {    [super viewDidLoad];        // Native(OC+Swift) + HTML5        self.webView.delegate = self;    [self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.baidu.com"]]];}#pragma mark - <UIWebViewDelegate>- (void)webViewDidFinishLoad:(UIWebView *)webView{    NSLog(@"%s", __func__);        self.backItem.enabled = webView.canGoBack;    self.forward.enabled = webView.canGoForward;}- (void)webViewDidStartLoad:(UIWebView *)webView{    NSLog(@"%s", __func__);}- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error{    NSLog(@"%s", __func__);        self.backItem.enabled = webView.canGoBack;    self.forward.enabled = webView.canGoForward;}@end