WKWebView，直接显示网页，需要引入第三方类：

加上进度条代码，很完美使用

webView.h

#import 
     
      @interface ECBankCardAddViewController : UIViewController/** 请求H5的时候，需要传的token */@property (nonatomic, copy) NSString *token;@end
     

 webView.m

////  ECBandCardAddViewController.m//  ECardBusiness////  Created by yongsheng.jiang on 2018/2/6.//  Copyright © 2018年 bige. All rights reserved.//#import "ECBankCardAddViewController.h"#import "WebViewJavascriptBridge.h"@interface ECBankCardAddViewController ()
     
      @property (nonatomic, strong) WKWebView *webView;@property (nonatomic, weak) UIProgressView *progressView;@end@implementation ECBankCardAddViewController- (void)dealloc {    [self.webView removeObserver:self forKeyPath:NSStringFromSelector(@selector(estimatedProgress))];    self.webView.navigationDelegate = nil;}- (void)viewDidLoad {    [super viewDidLoad];    self.title = @"添加银行卡";    self.view.backgroundColor = [UIColor whiteColor];        WKWebView *webView = [[NSClassFromString(@"WKWebView") alloc] initWithFrame:self.view.bounds];    [self.view addSubview:webView];    self.webView = webView;        NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@%@",web_add_bandcard,self.token]]];    [webView loadRequest:request];        [webView addObserver:self              forKeyPath:NSStringFromSelector(@selector(estimatedProgress))                 options:0                 context:nil];        [self setupProgressView];}- (void)setupProgressView {    UIProgressView *progressView = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleDefault];    progressView.frame = CGRectMake(0, 64, SCREEN_WIDTH, 5);        [progressView setTrackTintColor:[UIColor colorWithRed:240.0/255                                                    green:240.0/255                                                     blue:240.0/255                                                    alpha:1.0]];    progressView.progressTintColor = [UIColor greenColor];    [self.view addSubview:progressView];        _progressView = progressView;}#pragma mark - WKNavigationDelegate- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation {    NSLog(@"didStartProvisionalNavigation");    //开始加载的时候，让进度条显示    self.progressView.hidden = NO;}- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation {    NSLog(@"didCommitNavigation");}- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation {    NSLog(@"didFinishNavigation");}#pragma mark - KVO//kvo 监听进度-(void)observeValueForKeyPath:(NSString *)keyPath                     ofObject:(id)object                       change:(NSDictionary
      
        *)change                      context:(void *)context{        if ([keyPath isEqualToString:NSStringFromSelector(@selector(estimatedProgress))]        && object == self.webView) {        [self.progressView setAlpha:1.0f];        BOOL animated = self.webView.estimatedProgress > self.progressView.progress;        [self.progressView setProgress:self.webView.estimatedProgress                              animated:animated];                if (self.webView.estimatedProgress >= 1.0f) {            [UIView animateWithDuration:0.3f                                  delay:0.3f                                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];    }}@end
      
     

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