iOS Web Page(Basics)

iOS has UI component which display Web page. That is UIWebView
iOS has one more feature to show web site. Call Safari application directly.
WebView also safari feature but, it doesn’t open Safari as an new application.
The easy use is to show it as HELP page.
Create HELP pages in your web server and show them as help or instruction. You can change them any time.



Name Description
scalePageToFit Enable pinch action or not
loading While loading or not
canGoBack Whether you can go back the previous page or not
canGoForward Whether you can go forward or not


Method Description
(NSURLRequest *)request
Load the page
-(void)goBack Go back the previous page
-(void)goForward Go forward the next page
-(void)reload Reload the current page
-(void)stopLoading Stop loading

We can manage web view by using these methods. go, back, etc…


UIWebViewDelegate is delegate for UIWebView.
These are delegation methods

Method Description
-(void)webViewDidStartLoad:(UIWebView*)webView when the web page starts to load
-(void)webViewDidFinishLoad:(UIWebView*)webView when the web page finish up loading

And more methods,

Method Description
– (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error Failed to load web page
– (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType Sent before a web view begins loading web page

If shouldStartLoadWithRequest returns NO, never load web page.
It also can do custom operation like hook.(with javascript)


This sample shows just basic use of UIWebView
Display the specific web page. While loading, the indicator of the top is shown.


@interface WebViewSampleViewController : UINavigationController<UIWebViewDelegate>


@interface WebViewSampleViewController ()
@property (nonatomic) UIWebView *web;

@implementation WebViewSampleViewController

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

- (void)viewDidLoad
    [super viewDidLoad];
    // Web view
    self.web = [[UIWebView alloc] initWithFrame:self.view.bounds];
    self.web.scalesPageToFit = YES;  // Enable pinch out or not
    self.web.delegate = self;
    [self.view addSubview:self.web];
    // Load web page
    NSURL *url = [NSURL URLWithString:@""];
    NSURLRequest *req = [NSURLRequest requestWithURL:url];
    [self.web loadRequest:req];

#pragma mark - UIWebViewDelegate
-(void)webViewDidStartLoad:(UIWebView*)webView {
    // Start Load
    NSLog(@"Start load");
    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;  // Indicator on

-(void)webViewDidFinishLoad:(UIWebView*)webView {
    // Finish Load
    NSLog(@"Finish load");
    [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;   // Indicator off



Stop Loading

Use stopLoading method

[webView stopLoading];


Apple Document