不使用IB在UIWebView里面扩展添加UIMenuItem菜单

创建一个controller名为YKWebViewDemoViewController

.h文件代码如下

#import <UIKit/UIKit.h>

@interface YKWebViewDemoViewController : UIViewController<UIWebViewDelegate>{

}
@property (strong, nonatomic) UIWebView *webView;

- (void)loadWebPageWithString:(NSString*)urlString;
- (void)customAction1:(id)sender;
- (void)customAction2:(id)sender;
@end

.m文件代码

#import "YKWebViewDemoViewController.h"

@interface YKWebViewDemoViewController ()

@end

@implementation YKWebViewDemoViewController

@synthesize webView;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
CGRect rect = [[UIScreen mainScreen] bounds];

webView = [[UIWebView alloc]initWithFrame:rect];
webView.scalesPageToFit =YES;
webView.delegate =self;
[self.view addSubview:webView];             //加载到自己的view

NSString *urlAddress = @"http://www.baidu.com";
[self loadWebPageWithString:urlAddress];
}

- (void)viewDidUnload
{
[super viewDidUnload];
webView = nil;
// Release any retained subviews of the main view.
}
- (void)dealloc
{
[webView release];
[super dealloc];
}
//自定义弹出菜单
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];

UIMenuItem *customMenuItem1 = [[[UIMenuItem alloc] initWithTitle:@"custom 1" action:@selector(customAction1:)] autorelease];
UIMenuItem *customMenuItem2 = [[[UIMenuItem alloc] initWithTitle:@"custom 2" action:@selector(customAction2:)] autorelease];
UIMenuController *menu = [UIMenuController sharedMenuController];
[menu setMenuItems:[NSArray arrayWithObjects:customMenuItem1, customMenuItem2, nil]];
[menu setMenuVisible:YES animated:YES];
}
- (void)viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];

[[UIMenuController sharedMenuController] setMenuItems:nil];
}

-(void)customAction1:(id)sender
{
NSLog(@"customAction1 is active");
}

-(void)customAction2:(id)sender
{
NSLog(@"customAction2 is active");
}
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
[super canPerformAction:action withSender:sender];
if (action == @selector(customAction1:) || action == @selector(customAction2:)) {
return YES;
}
else {
return NO;
}
}

-(BOOL)canBecomeFirstResponder
{
[super canBecomeFirstResponder];
return YES;
}
//加载网址
- (void)loadWebPageWithString:(NSString*)urlString
{
NSURL *url =[NSURL URLWithString:urlString];
NSURLRequest *request =[NSURLRequest requestWithURL:url];
[webView loadRequest:request];
}

- (void)webViewDidStartLoad:(UIWebView *)webView;
{
NSLog(@"didStartLoad is called");
}

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
NSLog(@"didFinishLoad is called");
}

- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
UIAlertView *alterview = [[UIAlertView alloc] initWithTitle:@""
//                                                        message:[error localizedDescription]
message:@"页面加载失败。"
delegate:nil
cancelButtonTitle:nil
otherButtonTitles:@"OK", nil];
[alterview show];
[alterview release];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
@end

在AppDelegate.h里面添加如下代码

#import <UIKit/UIKit.h>
@class YKWebViewDemoViewController;
@interface YKAppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;
@property (strong, nonatomic) YKWebViewDemoViewController *viewController;

@end

在AppDelegate.m里面导入Controller头文件

#import "YKWebViewDemoViewController.h"

并且添加

@synthesize viewController = _viewController;

修改原有didFinishLaunchingWithOptions代码如下

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
self.viewController = [[YKWebViewDemoViewController alloc] init];
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
return YES;
}