加载HTML5页面

//
//  HTML5ViewController.m
//  XunmallManager
//
//  Created by Mac on 2017/2/7.
//  Copyright © 2017年 yunmei. All rights reserved.
//

#import "HTML5ViewController.h"
#import <WebKit/WebKit.h>
@interface HTML5ViewController ()<WKUIDelegate,WKNavigationDelegate>
@property (nonatomic ,strong) WKWebView *webView;
@property (nonatomic,strong)UIProgressView *progressView;
@end

@implementation HTML5ViewController
//懒加载
- (WKWebView *)webView
{
    if (_webView == nil) {
        _webView = [[WKWebView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, HEIGHT - 64)];
        _webView.UIDelegate = self;
        _webView.navigationDelegate = self;
        _webView.scrollView.bounces = NO;
        [self.view addSubview:_webView];
    }
    return _webView;
}
- (UIProgressView *)progressView
{
    if (_progressView == nil) {
        _progressView = [[UIProgressView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, 1)];
        _progressView.progressTintColor = [UIColor whiteColor];
        [self.webView addSubview:_progressView];
    }
    return _progressView;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    self.title = @"云管理";
    [self.webView addObserver:self forKeyPath:@"estimatedProgress" options:NSKeyValueObservingOptionNew context:NULL];
    if (self.urlStr) {
        [self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:self.urlStr]]];
    }
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
    
    if ([keyPath isEqualToString:@"estimatedProgress"]) {
        
        if (object == _webView) {
            [self.progressView setAlpha:1.0f];
            [self.progressView setProgress:self.webView.estimatedProgress animated:YES];
            
            if(self.webView.estimatedProgress >= 1.0f) {
                
                [UIView animateWithDuration:0.3 delay:0.3 options:UIViewAnimationOptionCurveEaseOut animations:^{
                    [self.progressView setAlpha:0.0f];
                } completion:^(BOOL finished) {
                    [self.progressView setProgress:0.0f animated:NO];
                }];
                
            }
        }
        else
        {
            [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
        }
        
    }
       else {
        
        [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
    }
}

-(void)dealloc
{
    [self.webView removeObserver:self forKeyPath:@"estimatedProgress"];
    self.webView = nil;
}

@end