Why the html content be loaded twice?

[marcuswestin]

Why the html content be loaded twice?

[implementation]

It's the way how WebViewJavaScriptBridge works.
As you can see it here: https://github.com/marcuswestin/WebViewJavascriptBridge/blob/master/WebViewJavascriptBridge/WebViewJavascriptBridge.m#L79

It uses JS to redirect it's own iFrame, that will be processed by native Objective-C code in this method:
https://github.com/marcuswestin/WebViewJavascriptBridge/blob/master/WebViewJavascriptBridge/WebViewJavascriptBridge.m#L142

03.05.2012, в 16:21, roamerxv написал(а):

I code the test program.
the .h file is

//
// ViewController.h
// test
//
// Created by remote roamer on 12-5-3.
// Copyright (c) 2012年 MyCompanyName. All rights reserved.
//

#import <UIKit/UIKit.h>
#import "WebViewJavascriptBridge.h"
#import "AppDelegate.h"

@Class AppDelegate;

@interface ViewController : UIViewController
{
IBOutlet UIWebView * webView;
}

@Property(retain,nonatomic) UIWebView * webView;

@Property(retain,nonatomic) WebViewJavascriptBridge * javascriptBridge;

@Property(nonatomic,retain) NSBundle* bundle ;

@EnD

the .m file :

//
// ViewController.m
// test
//
// Created by remote roamer on 12-5-3.
// Copyright (c) 2012年 MyCompanyName. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@EnD

@implementation ViewController
@synthesize webView;
@synthesize bundle;
@synthesize javascriptBridge;

-(void) javascriptBridge:(WebViewJavascriptBridge *)bridge receivedMessage:(NSString *)message fromWebView:(UIWebView *)webView
{

}

-(void) webViewDidStartLoad:(UIWebView *)webView
{
NSLog(@"loading html start");
//[MBProgressHUD showHUDAddedTo:self.webView animated:YES];
}

-(void) webViewDidFinishLoad:(UIWebView *)webView
{
NSLog(@"load html finish.");
//[MBProgressHUD hideHUDForView:self.webView animated:YES];
}

-(void) webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
NSLog(@"load html error:%@",error);
//[MBProgressHUD hideHUDForView:self.webView animated:YES];
}

• (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
  {
  self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
  if (self) {
  // Custom initialization
  NSLog(@"initWithNibName");
  //self.javascriptBridge = [WebViewJavascriptBridge javascriptBridgeWithDelegate: (AppDelegate *)([UIApplication sharedApplication]).delegate];
  self.javascriptBridge = [WebViewJavascriptBridge javascriptBridgeWithDelegate:self];

  }
  return self;
  }

• (void)viewDidLoad
  {
  [super viewDidLoad];
  NSLog(@"viewDidLoad");

  //self.webView.delegate = self;
  self.webView.delegate = self.javascriptBridge;
  self.bundle = [NSBundle mainBundle];
  [webView loadHTMLString:@"aaa" baseURL:[NSURL fileURLWithPath:[bundle bundlePath]]];

  // Do any additional setup after loading the view, typically from a nib.
  }

• (void)viewDidUnload
  {

  [super viewDidUnload];
  // Release any retained subviews of the main view.
  }

• (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
  {
  return YES;
  }

@EnD

When I run it , the logger info in console is :

2012-05-03 20:11:06.777 test[14860:f803] initWithNibName
2012-05-03 20:11:06.791 test[14860:f803] viewDidLoad
2012-05-03 20:11:06.813 test[14860:f803] loading html start
2012-05-03 20:11:06.836 test[14860:f803] loading html start
2012-05-03 20:11:06.837 test[14860:f803] load html finish.
2012-05-03 20:11:06.840 test[14860:f803] load html finish.

Why the html connent loaded twice?

---

Reply to this email directly or view it on GitHub:
#10

[roamerxv]

thank you for replay。

It's mean that html content be loaded twice can not avoid ?

[implementation]

It doesn't get loaded twice - only almost empty iframe changes it's location.

03.05.2012, в 21:36, [email protected] написал(а):

thank you for replay。

It's mean that html content be loaded twice can not avoid ?

---

Reply to this email directly or view it on GitHub:
#10 (comment)

[roamerxv]

But I not use some empty iframe in my code. Just only one webView in the view that designed by xib file

[marcuswestin]

Maybe it loads multiple resources, eg favicon.ico?

-- while mobile

On May 3, 2012, at 5:21 AM, [email protected] wrote:

I code the test program.
the .h file is

//
// ViewController.h
// test
//
// Created by remote roamer on 12-5-3.
// Copyright (c) 2012年 MyCompanyName. All rights reserved.
//

#import <UIKit/UIKit.h>
#import "WebViewJavascriptBridge.h"
#import "AppDelegate.h"

@Class AppDelegate;

@interface ViewController : UIViewController
{
IBOutlet UIWebView * webView;
}

@Property(retain,nonatomic) UIWebView * webView;

@Property(retain,nonatomic) WebViewJavascriptBridge * javascriptBridge;

@Property(nonatomic,retain) NSBundle* bundle ;

@EnD

the .m file :

//
// ViewController.m
// test
//
// Created by remote roamer on 12-5-3.
// Copyright (c) 2012年 MyCompanyName. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@EnD

@implementation ViewController
@synthesize webView;
@synthesize bundle;
@synthesize javascriptBridge;

-(void) javascriptBridge:(WebViewJavascriptBridge *)bridge receivedMessage:(NSString *)message fromWebView:(UIWebView *)webView
{

}

-(void) webViewDidStartLoad:(UIWebView *)webView
{
NSLog(@"loading html start");
//[MBProgressHUD showHUDAddedTo:self.webView animated:YES];
}

-(void) webViewDidFinishLoad:(UIWebView *)webView
{
NSLog(@"load html finish.");
//[MBProgressHUD hideHUDForView:self.webView animated:YES];
}

-(void) webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
NSLog(@"load html error:%@",error);
//[MBProgressHUD hideHUDForView:self.webView animated:YES];
}

• (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
  {
  self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
  if (self) {
  // Custom initialization
  NSLog(@"initWithNibName");
  //self.javascriptBridge = [WebViewJavascriptBridge javascriptBridgeWithDelegate: (AppDelegate *)([UIApplication sharedApplication]).delegate];
  self.javascriptBridge = [WebViewJavascriptBridge javascriptBridgeWithDelegate:self];

  }
  return self;
  }

• (void)viewDidLoad
  {
  [super viewDidLoad];
  NSLog(@"viewDidLoad");

  //self.webView.delegate = self;
  self.webView.delegate = self.javascriptBridge;
  self.bundle = [NSBundle mainBundle];
  [webView loadHTMLString:@"aaa" baseURL:[NSURL fileURLWithPath:[bundle bundlePath]]];

  // Do any additional setup after loading the view, typically from a nib.
  }

• (void)viewDidUnload
  {

  [super viewDidUnload];
  // Release any retained subviews of the main view.
  }

• (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
  {
  return YES;
  }

@EnD

When I run it , the logger info in console is :

2012-05-03 20:11:06.777 test[14860:f803] initWithNibName
2012-05-03 20:11:06.791 test[14860:f803] viewDidLoad
2012-05-03 20:11:06.813 test[14860:f803] loading html start
2012-05-03 20:11:06.836 test[14860:f803] loading html start
2012-05-03 20:11:06.837 test[14860:f803] load html finish.
2012-05-03 20:11:06.840 test[14860:f803] load html finish.

Why the html connent loaded twice?

---

Reply to this email directly or view it on GitHub:
#10

[roamerxv]

Hi.I used the WeViewbJavascriptBridge in my project , then found the html reload twice .
So I write the simple test project , not used any resources and faviicon.ico that just only a simple window .
project is uploaded .
https://github.com/roamerxv/WebJavascriptBridgeTester

Can u help me to find the problems? thank you very much.

[marcuswestin]

Im sorry, but I don't have time to debug this right now. I believe that event may fire every time you send a message, in which case the second load may be the JavaScript sending the "I'm ready" message.

-- while mobile

On May 3, 2012, at 7:47 PM, [email protected] wrote:

Hi.I used the WeViewbJavascriptBridge in my project , then found the html reload twice .
So I write the simple test project , not used any resources and faviicon.ico that just only a simple window .
project is uploaded .
https://github.com/roamerxv/WebJavascriptBridgeTester

Can u help me to find the problems? thank you very much.

---

Reply to this email directly or view it on GitHub:
#10 (comment)

[roamerxv]

ok。tank for your replay.
I take it by myself

[marcuswestin]

Sorry :( best of luck!!

-- while mobile

On May 4, 2012, at 4:45 AM, [email protected] wrote:

ok。tank for your replay.
I take it by myself

---

Reply to this email directly or view it on GitHub:
#10 (comment)

[marcuswestin]

Closing - feel free to reopen.