iOS 使用NJKWebViewProgress做webview进度条

#import "NJKWebViewProgressView.h"
#import "NJKWebViewProgress.h"

<UIWebViewDelegate, NJKWebViewProgressDelegate>

@implementation ViewController
{
IBOutlet __weak UIWebView *_webView;
NJKWebViewProgressView *_webViewProgressView;
NJKWebViewProgress *_webViewProgress;
}

- (void)viewDidLoad
{
[super viewDidLoad];

_webViewProgress = [[NJKWebViewProgress alloc] init];
_webView.delegate = _webViewProgress;
_webViewProgress.webViewProxyDelegate = self;
_webViewProgress.progressDelegate = self;

CGRect navBounds = self.navigationController.navigationBar.bounds;
CGRect barFrame = CGRectMake(0,
navBounds.size.height - 2,
navBounds.size.width,
2);
_webViewProgressView = [[NJKWebViewProgressView alloc] initWithFrame:barFrame];
_webViewProgressView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleTopMargin;
[_webViewProgressView setProgress:0 animated:YES];
[self loadBaidu];
[self.navigationController.navigationBar addSubview:_webViewProgressView];
}

-(void)loadBidu
{
NSURLRequest *req = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:@"http://www.baidu.com/"]];
[_webView loadRequest:req];
}

#pragma mark - NJKWebViewProgressDelegate
-(void)webViewProgress:(NJKWebViewProgress *)webViewProgress updateProgress:(float)progress
{
[_webViewProgressView setProgress:progress animated:YES];
self.title = [_webView stringByEvaluatingJavaScriptFromString:@"document.title"];
}