iOS uiwebview使用html5出现崩溃并且无法定位

Question

//
// WebUrlLoadViewController.m
// ChatDemo-UI2.0
//
// Created by Apple on 15-7-12.
// Copyright (c) 2015年 Apple. All rights reserved.
//

#import "WebUrlLoadViewController.h"
#import "WXApi.h"
@interface WebUrlLoadViewController ()
@property (weak, nonatomic) IBOutlet UIWebView *webViewLoadUrl;
@property (weak, nonatomic) IBOutlet UIProgressView *progressView;

@end

@implementation WebUrlLoadViewController
{
NJKWebViewProgress *_progressProxy;
NSArray *arrayBack;
NSArray *arrayClose;
}
NSString *urlStr;
NSString *webTitle = @"加载中";

• (void)viewDidLoad {
  [super viewDidLoad];
  self.title = @"加载中";

  //获取状态栏的高度
  CGRect rect = [[UIApplication sharedApplication] statusBarFrame];
  int statusBarHeight = rect.size.height;
  //获取导航栏的高度
  CGFloat navigationBarHeight = CGRectGetHeight(self.navigationController.navigationBar.frame);

  int progressViewY = statusBarHeight + navigationBarHeight;
  // 1. 用一个临时变量保存返回值。
  CGRect temp = _progressView.frame;
  // 2. 给这个变量赋值。因为变量都是L-Value，可以被赋值
  temp.origin.y = progressViewY;
  // 3. 修改frame的值
  _progressView.frame = temp;

  UIButton *shareButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
  [shareButton setImage:[UIImage imageNamed:@"z_webshare.png"] forState:UIControlStateNormal];
  [shareButton addTarget:self action:@selector(shareUrlToWeChat) forControlEvents:UIControlEventTouchUpInside];
  UIBarButtonItem *shareItem = [[UIBarButtonItem alloc] initWithCustomView:shareButton];
  self.navigationItem.rightBarButtonItem = shareItem;

  _progressProxy = [[NJKWebViewProgress alloc] init];
  _webViewLoadUrl.delegate = _progressProxy;
  _progressProxy.webViewProxyDelegate = self;
  _progressProxy.progressDelegate = self;

  NSURL *url =[NSURL URLWithString:[NSString stringWithFormat:@"%@",urlStr]];
  _webViewLoadUrl.backgroundColor = [UIColor clearColor];
  _webViewLoadUrl.opaque = NO;
  [_webViewLoadUrl loadRequest:[NSURLRequest requestWithURL:url]];

  UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"返回" style:UIBarButtonItemStylePlain target:self action:@selector(backWebView)];
  UIBarButtonItem *closeButton = [[UIBarButtonItem alloc] initWithTitle:@"关闭" style:UIBarButtonItemStylePlain target:self action:@selector(webLoadToUpView)];
  arrayBack = [NSArray arrayWithObjects: backButton,nil];
  arrayClose = [NSArray arrayWithObjects: backButton,closeButton,nil];
  [self.navigationItem setLeftBarButtonItems:arrayBack];

}

-(void)shareUrlToWeChat{
UIActionSheet *actionSheet = [[UIActionSheet alloc]
initWithTitle:@"分享"
delegate:self
cancelButtonTitle:@"取消"
destructiveButtonTitle:nil
otherButtonTitles: @"发送给好友",@"分享到朋友圈",@"复制链接",nil];
[actionSheet showInView:self.view];

}

-(void)actionSheet:(UIActionSheet*)actionSheet
didDismissWithButtonIndex:(NSInteger)buttonIndex{

if(buttonIndex == [actionSheet cancelButtonIndex]){
    return;
}

//分享给微信朋友
if(buttonIndex == 0){
    //        [self showHint:@"发送给好友"];
    [self sendLinkContent:0];
}
//分享到朋友圈
if(buttonIndex == 1){
    //        [self showHint:@"分享到朋友圈"];
    [self sendLinkContent:1];
}

if (buttonIndex == 2) {
    UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
    pasteboard.string = _webViewLoadUrl.request.URL.absoluteString;
    [self showHint:@"链接已复制，长按可粘贴"];
}

}

• (void) sendLinkContent:(NSInteger *)type
  {
  WXMediaMessage *message = [WXMediaMessage message];
  message.title = webTitle;
  message.description = webTitle;
  // NSString *myURL = @"http://ubmcmm.baidustatic.com/media/v1/0f0005z0qh4dSM4Qwg1USf.jpg";
  // UIImage *image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:myURL]]];
  // UIImage *image = [UIImage imageNamed:@"120.png"];
  // [message setThumbImage:image];

  WXWebpageObject *ext = [WXWebpageObject object];
  ext.webpageUrl = urlStr;

  message.mediaObject = ext;

  SendMessageToWXReq* req = [[SendMessageToWXReq alloc] init];
  req.bText = NO;
  req.message = message;
  // req.scene = WXSceneSession;//会话
  // req.scene = WXSceneTimeline;//朋友圈
  // req.scene = WXSceneFavorite;//收藏
  if (type == 0) {
  req.scene = WXSceneSession;//会话
  }else if (type == 1){
  req.scene = WXSceneTimeline;//朋友圈
  }
  [WXApi sendReq:req];

}

//加载进度
#pragma mark - NJKWebViewProgressDelegate
-(void)webViewProgress:(NJKWebViewProgress *)webViewProgress updateProgress:(float)progress
{
if (progress == 0.0) {
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
_progressView.progress = 0;
[UIView animateWithDuration:0.27 animations:^{
self->_progressView.alpha = 1.0;
}];
}
if (progress == 1.0) {
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
[UIView animateWithDuration:0.27 delay:progress - _progressView.progress options:0 animations:^{
self->_progressView.alpha = 0.0;
} completion:nil];
}
[_progressView setProgress:progress animated:YES];
}

//加载前
//- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request
// navigationType:(UIWebViewNavigationType)navigationType{
// [self showHint:@"准备加载"];
// return YES;
//}

• (void)webViewDidStartLoad:(UIWebView *)webView {

}

• (void)webViewDidFinishLoad:(UIWebView *)webView { webTitle = [webView stringByEvaluatingJavaScriptFromString:@"document.title"]; self.title = webTitle; //如果打开了二级以上的页面，则显示关闭的按钮 if ([_webViewLoadUrl canGoBack]) { [self.navigationItem setLeftBarButtonItems:arrayClose]; }else{ [self.navigationItem setLeftBarButtonItems:arrayBack]; }

}

• (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error{
  [self showHint:@"加载失败"];
  }

• (void)backWebView
  {
  if ([_webViewLoadUrl canGoBack]) {
  [_webViewLoadUrl goBack];
  }else{
  [self.navigationController popViewControllerAnimated:YES];
  }
  }

-(void)webLoadToUpView{
[self.navigationController popViewControllerAnimated:YES];
}

-(void)setLoadUrl:(NSString*)url{
urlStr = url;
}

• (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. }

@end

2015-08-03 23:04:45.568 ChatDemo-UI2.0[5975:60b] Debug volume warning behavior enabled
2015-08-03 23:04:45.751 ChatDemo-UI2.0[5975:60b] Debug volume warning behavior enabled
2015-08-03 23:05:05.551 ChatDemo-UI2.0[5975:60b] Took background task assertion (9) for playback stall
2015-08-03 23:05:56.958 ChatDemo-UI2.0[5975:60b] Ending background task assertion (9) for playback stall

Answer 1

难道是uiwebview不支持html5？？？？