以下是我的代码。我只是想加载一个网站页面,并在屏幕上放置一个后退按钮。不知道为什么没有在屏幕上显示。创建一个UIWebView并编程加载一个网站
在.H#import <UIKit/UIKit.h>
@interface ThirdViewController : UIViewController
{
UIWebView *myWebView;
}
@property (nonatomic, retain) UIWebView *myWebView;
-(IBAction)goBack:(id)sender;
@end
在.M
#import "ThirdViewController.h"
@implementation ThirdViewController
@synthesize myWebView;
-(IBAction)goBack:(id)sender
{
[myWebView goBack];
}
- (void)viewDidLoad
{
[super viewDidLoad];
NSString *urlAddress = @"http://www.apple.com";
NSURL *url = [NSURL URLWithString:urlAddress];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
[myWebView loadRequest:requestObj];
[self.view addSubview:myWebView];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:self action:@selector(goBack:)];
}
你错过了主要的事情。哪里是初始化myWebView – Narayana