【发布时间】：2014-03-07 22:49:41
【问题描述】：
我在尝试在 ios 应用中打开网页时尝试此问题。在 ios7 之前它运行良好，但现在我们正在升级我们的应用程序，这是我们唯一遇到的严重问题。
关于这个问题，我发现它是在调用两次时产生的。我认为这就是这里发生的事情，因为如果我在 didFailLoadWithError 中写一个 NSLog 文本，它会显示两次。
我尝试忽略错误，但加载圈显示为以太网且网页未加载。
我把我的代码贴在这里，也许你可以帮助我们或给我们一个线索。
#import "WebPoiViewController.h"
#import "FavoriteManager.h"
@interface WebPoiViewController ()
@end
@implementation WebPoiViewController
@synthesize webView,urlStr, activityIndicator,title2,poi=_poi,position=_position;
- (void)viewDidLoad { //We have a NIB file in play here, so I dropped the loadView here. Just make sure that your loadView is not getting called twice!
[super viewDidLoad];
if (self.poi!=nil){
self.position = [[FavoriteManager sharedInstance] isPoiInFavoriteList:self.poi];
if (self.position==-1){
UIButton *button1 = [[UIButton alloc] init];
button1.frame=CGRectMake(0,0,30,30);
[button1 setBackgroundImage:[UIImage imageNamed: @"Favorites_icon_inactive.png"] forState:UIControlStateNormal];
[button1 addTarget:self action:@selector(makeFavorite:) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithCustomView:button1];
//self.navigationItem.rightBarButtonItem= [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"Favorites_icon_inactive.png"] style: UIBarButtonItemStylePlain target:self action:@selector(makeFavorite:)];
} else {
UIButton *button1 = [[UIButton alloc] init];
button1.frame=CGRectMake(0,0,30,30);
[button1 setBackgroundImage:[UIImage imageNamed: @"Favorites_icon.png"] forState:UIControlStateNormal];
[button1 addTarget:self action:@selector(deleteFavorite:) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithCustomView:button1];
//self.navigationItem.rightBarButtonItem= [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"Favorites_icon.png"] style: UIBarButtonItemStylePlain target:self action:@selector(deleteFavorite:)];
}
}
if (nil!=title2&& ![title2 isEqualToString:@""]){
self.title=self.title2;
}
[self loadView];
}
- (IBAction)makeFavorite:(id)sender {
self.position=[[FavoriteManager sharedInstance] addFavotitePOI:self.poi];
UIButton *button1 = [[UIButton alloc] init];
button1.frame=CGRectMake(0,0,30,30);
[button1 setBackgroundImage:[UIImage imageNamed: @"Favorites_icon.png"] forState:UIControlStateNormal];
[button1 addTarget:self action:@selector(deleteFavorite:) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithCustomView:button1];
}
- (IBAction)deleteFavorite:(id)sender {
[[FavoriteManager sharedInstance] deleteFavotitePOIat:self.position];
self.position=-1;
UIButton *button1 = [[UIButton alloc] init];
button1.frame=CGRectMake(0,0,30,30);
[button1 setBackgroundImage:[UIImage imageNamed: @"Favorites_icon_inactive.png"] forState:UIControlStateNormal];
[button1 addTarget:self action:@selector(makeFavorite:) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithCustomView:button1];
}
- (void)loadView {
UIView *contentView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
self.view = contentView;
CGRect webFrame = [[UIScreen mainScreen] applicationFrame];
webFrame.origin.y = 0.0f;
webView = [[UIWebView alloc] initWithFrame:webFrame];
webView.backgroundColor = [UIColor blueColor];
webView.scalesPageToFit = YES;
webView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);
webView.delegate = self;
if([webView respondsToSelector:@selector(scrollView)]){
webView.scrollView.bounces = NO;
}
[self.view addSubview: webView];
if (nil!=self.urlStr && ![urlStr isEqualToString:@""]){
NSLog(@"NO ES NIL");
//[webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:self.urlStr]]];
[webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:urlStr]]];
activityIndicator = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
activityIndicator.frame = CGRectMake(0.0, 0.0, 40.0, 40.0);
//activityIndicator.center = self.view.center;
activityIndicator.center = CGPointMake(self.view.frame.size.width/2,self.view.frame.size.height/2);
[self.view addSubview: activityIndicator];
} else{
[webView loadHTMLString:@"<html><center><br /><br /><font size=+5>No info<br /><br /></font></center></html>" baseURL:nil];
}
}
#pragma mark WEBVIEW Methods
- (void)webViewDidStartLoad:(UIWebView *)myWebView
{
// starting the load, show the activity indicator in the status bar
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
[activityIndicator startAnimating];
}
- (void)webViewDidFinishLoad:(UIWebView *)myWebView
{
// finished loading, hide the activity indicator in the status bar
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
[activityIndicator stopAnimating];
}
- (void)webView:(UIWebView *)myWebView didFailLoadWithError:(NSError *)error
{
if([error code] == NSURLErrorCancelled) return; // Ignore this error
NSLog(@"FAIL");
// load error, hide the activity indicator in the status bar
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
// report the error inside the webview
NSString* errorString = [NSString stringWithFormat:
@"<html><center><br /><br /><font size=+5 color='red'>Error<br /><br />Your request %@</font></center></html>",
error.localizedDescription];
[webView loadHTMLString:errorString baseURL:nil];
}
- (void)didReceiveMemoryWarning{
[super didReceiveMemoryWarning];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown;
}
- (BOOL)shouldAutorotate {
return [self.navigationController shouldAutorotate];
}
- (NSUInteger)supportedInterfaceOrientations {
return [self.navigationController supportedInterfaceOrientations];
}
@end
【问题讨论】：