iPhone Bookmark UIWebView - 显示页面标题和存储 URL

Question

我有一个完全可操作的 Web 浏览器应用程序，用于存储书签页面。单击书签按钮时，将显示已存储网站的列表视图。我希望列表视图显示页面标题，而不是显示 URL，但我希望 UIWebView 在单击标题时转到 URL。

我已包含以下代码。我也将属性放在两个头文件中，但无法使其正常工作。请帮忙！

ExplorerViewController.h

#import <UIKit/UIKit.h>

@interface ExplorerViewController : UIViewController <UITextFieldDelegate, UIWebViewDelegate, UIActionSheetDelegate>{
    UITextField *urlField;
    UIBarButtonItem *refreshButton;
    UIBarButtonItem *backButton;
    UIBarButtonItem *forwardButton;
    UIBarButtonItem *bookMarksButton;
    UIActivityIndicatorView *loadingActivity;
    UIWebView *webView;
    UINavigationBar *navigationBar;
}
@property (nonatomic, retain) IBOutlet UITextField *urlField;
@property (nonatomic, retain) IBOutlet UIBarButtonItem *refreshButton;
@property (nonatomic, retain) IBOutlet UIBarButtonItem *backButton;
@property (nonatomic, retain) IBOutlet UIBarButtonItem *forwardButton;
@property (nonatomic, retain) IBOutlet UIBarButtonItem *bookMarksButton;
@property (nonatomic, retain) IBOutlet UIActivityIndicatorView *loadingActivity;
@property (nonatomic, retain) IBOutlet UIWebView *webView;
@property (nonatomic, retain) IBOutlet UINavigationBar *navigationBar;
-(NSString*)repairURL:(NSString*)url;
-(IBAction)refreshWebView;
-(IBAction)goBack;
-(IBAction)goForward;
-(void)actualizeButtons;
-(IBAction)bookmarksButtonTapped;
-(IBAction)addBookmarkButtonTapped;
@end

ExplorerViewController.m

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    if (buttonIndex == 0) {
        NSMutableArray *bookmarks = [[[NSUserDefaults standardUserDefaults] arrayForKey:@"Bookmarks"] mutableCopy];
        NSMutableArray *websitetitle = [[[NSUserDefaults standardUserDefaults] arrayForKey:@"Websitetitle"] mutableCopy];
        if (!bookmarks) {
            bookmarks = [[NSMutableArray alloc] init];
        }
        [bookmarks addObject:[[[[self webView]request] URL] absoluteString]];
        [websitetitle addObject:[self.webView stringByEvaluatingJavaScriptFromString:@"document.title"]];
        [[NSUserDefaults standardUserDefaults] setObject:bookmarks forKey:@"Bookmarks"];
        [[NSUserDefaults standardUserDefaults] setObject:websitetitle forKey:@"Websitetitle"];
        [bookmarks release];
        [websitetitle release];
    }
}

BookmarksViewController.h

#import <UIKit/UIKit.h>

@class ExplorerViewController;
@interface BookmarksViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>{
    NSMutableArray *bookmarks;
    NSMutableArray *websitetitle;
    ExplorerViewController *explorerView;
}

@property (nonatomic, retain) NSMutableArray *bookmarks;
@property (nonatomic, retain) NSMutableArray *websitetitle;
@property (nonatomic, retain) ExplorerViewController *explorerView;

-(IBAction)cancelButtonTapped;

@end

BookmarksViewController.m

#import "BookmarksViewController.h"
#import "ExplorerViewController.h"

@implementation BookmarksViewController
@synthesize bookmarks, websitetitle, explorerView;


-(IBAction)cancelButtonTapped {
    [self.parentViewController dismissModalViewControllerAnimated:true];
}

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [bookmarks count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *cellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:cellIdentifier] autorelease];
    }

    cell.textLabel.text = [websitetitle objectAtIndex:indexPath.row];

    return cell;
}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    explorerView.urlField.text = [bookmarks objectAtIndex:indexPath.row];
    [explorerView textFieldShouldReturn:explorerView.urlField];
    [self.parentViewController dismissModalViewControllerAnimated:true];
}

-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        [bookmarks removeObjectAtIndex:indexPath.row];
        [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath, nil] withRowAnimation:UITableViewRowAnimationFade];
        [[NSUserDefaults standardUserDefaults] setObject:bookmarks forKey:@"Bookmarks"];
    }
}

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

- (void)dealloc
{
    [super dealloc];
    // e.g. self.myOutlet = nil;
    [explorerView release];
    explorerView = nil;
    [bookmarks release];
    bookmarks = nil;
}

Answer 1

你要实现tableView:didSelectRowAtIndexPath:，大致如下：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

  NSString *url=[bookmarks objectAtIndex:indexPath.row];

  // open url here

}

关于您的代码的一些注意事项：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

  explorerView.urlField.text = [bookmarks objectAtIndex:indexPath.row];
  [explorerView textFieldShouldReturn:explorerView.urlField];
  [self.parentViewController dismissModalViewControllerAnimated:true]; 

} 

• 您是否尝试复制 Mobile Safari？
• 您应该避免将书签存储在 NSUserDefaults 存储中，并使用适当的存储。
• 您不应尝试通过模拟交互事件来触发导航操作；使 UIWebView（您的底层浏览器对象）加载网页的正确方法是使用 loadRequest:

以下代码可能对你有用（我在这里依赖很多假设）：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

  // Get your url from the bookmarks object
  NSString *urlString = [bookmarks objectAtIndex:indexPath.row];

  // Convert to a URL object.
  NSURL *url = [NSURL URLWithString:urlString];

 // Create request
 NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];

 //Load the request in the UIWebView.
 [explorerView.webView loadRequest:requestObj];

 // dismiss
 [self.parentViewController dismissModalViewControllerAnimated:true]; 

}