iOS 8 更新的WKWebView，说说项目中怎么用它,其中包括了获取标题，加载进度，和webview跟原生的交互打电话。
#import "BaseViewController.h"
#import <WebKit/WebKit.h>
@interface BaseWebViewController : BaseViewController
- (instancetype)initWithUrl:(NSString *)urlStr;
@property(nonatomic,strong)WKWebView *webView;
@property(nonatomic,copy)NSString *urlString;
@property(nonatomic,strong)UIProgressView *progressView;
@end
#import "BaseWebViewController.h"
@interface BaseWebViewController ()<WKNavigationDelegate>
@end
@implementation BaseWebViewController
- (instancetype)initWithUrl:(NSString *)urlStr{
self = [super init];
if (self) {
self.urlString = urlStr;
}
return self;
}
- (void)viewDidLoad {
[super viewDidLoad];
[self loadUI];
}
- (void)loadUI{
self.webView = [[WKWebView alloc]initWithFrame:CGRectMake(0, 0, KScreenWidth, KScreenHeight-64)];
self.webView.backgroundColor = [UIColor blackColor];
self.webView.navigationDelegate = self;
[self.view addSubview:self.webView];
self.progressView = [[UIProgressView alloc]initWithFrame:CGRectMake(0, 0, KScreenWidth, 2)];
//进度条的颜色
self.progressView.trackTintColor = [UIColor blackColor];
self.progressView.progressTintColor = KColorFromRGB(0x00c853);
[self.view addSubview:self.progressView];
[self.webView addObserver:self
forKeyPath:@"estimatedProgress"
options:NSKeyValueObservingOptionNew
context:nil];
[self.webView addObserver:self forKeyPath:@"title" options:NSKeyValueObservingOptionNew context:NULL];
NSURL *url = [NSURL URLWithString:self.urlString];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[self.webView loadRequest:request];
}
#pragma mark- 监听进度的变化
- (void)observeValueForKeyPath:(NSString *)keyPath
ofObject:(id)object
change:(NSDictionary<NSString *,id> *)change
context:(void *)context
{
if ([keyPath isEqualToString:@"estimatedProgress"]) {
self.progressView.progress = self.webView.estimatedProgress;
NSLog(@"%f",self.webView.estimatedProgress);
// 加载完成
if (self.webView.estimatedProgress >= 1.0f ) {
[UIView animateWithDuration:0.25f animations:^{
self.progressView.alpha = 0.0f;
self.progressView.progress = 0.0f;
}];
}else{
self.progressView.alpha = 1.0f;
}
}else if ([keyPath isEqualToString:@"title"])
{
// self.title = self.webView.title;
}
}
#pragma mark- 在发送请求之前，决定是否跳转的代理
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
DLog(@"在发送请求之前，决定是否跳转的代理");
NSString *url = [navigationAction.request.URL absoluteString];
if ([url hasPrefix:@"tel"]) {
//打电话
NSString *telStr = [url substringFromIndex:4];
[self callPhone:telStr];
decisionHandler(WKNavigationActionPolicyCancel);
}
decisionHandler(WKNavigationActionPolicyAllow);
}
- (void)callPhone:(NSString *)telStr
{
NSMutableString* str=[[NSMutableString alloc] initWithFormat:@"tel:%@",telStr];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:str]];
}
#pragma mark-在收到响应后，决定是否跳转的代理
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(nonnull WKNavigationResponse *)navigationResponse decisionHandler:(nonnull void (^)(WKNavigationResponsePolicy))decisionHandler{
DLog(@"在收到响应后，决定是否跳转的代理");
decisionHandler(WKNavigationResponsePolicyAllow);
}
#pragma mark-接收到服务器跳转请求的代理
- (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation{
DLog(@"接收到服务器跳转请求的代理");
}
#pragma mark-准备加载页面
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(null_unspecified WKNavigation *)navigation{
DLog(@"准备开始加载页面");
}
#pragma mark- 内容开始加载(view的过渡动画可在此方法中加载)
- (void)webView:(WKWebView *)webView didCommitNavigation:(null_unspecified WKNavigation *)navigation{
DLog(@"内容开始加载(view的过渡动画可在此方法中加载)");
}
#pragma mark- 页面加载完成(view的过渡动画的移除可在此方法中进行)
- (void)webView:(WKWebView *)webView didFinishNavigation:(null_unspecified WKNavigation *)navigation{
DLog(@"页面加载完成(view的过渡动画的移除可在此方法中进行))");
}
#pragma mark- 页面加载失败
- (void)webView:(WKWebView *)webView didFailNavigation:(null_unspecified WKNavigation *)navigation withError:(NSError *)error{
DLog(@"页面加载失败");
}
- (void)dealloc {
[self.webView removeObserver:self forKeyPath:@"estimatedProgress" context:nil];
[self.webView removeObserver:self forKeyPath:@"title" context:nil];
}
@end
