iOS中WKWebView仿微信加载进度条
作者:抬头看见柠檬树
这篇文章主要为大家详细介绍了iOS中WKWebView仿微信加载进度条,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
本文实例为大家分享了WKWebView仿微信加载进度条的具体代码,供大家参考,具体内容如下
WKWebView添加了estimatedProgress属性(double类型),我们可以利用该属性来设置UIProgressView
为页面添加UIProgressView属性
@property (nonatomic, strong) WKWebView *mywebView; @property (nonatomic, strong) UIProgressView *progressView;//设置加载进度条
懒加载UIProgressView
-(UIProgressView *)progressView{ if (!_progressView) { _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]; } return _progressView; }
在初始化WKWebView时(我是在懒加载时) kvo 添加监控
[_mywebView addObserver:self forKeyPath:NSStringFromSelector(@selector(estimatedProgress)) options:0 context:nil];
页面开始加载时,隐藏进度条
//开始加载 -(void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation{ //开始加载的时候,让进度条显示 self.progressView.hidden = NO; }
kvo 监听进度
//kvo 监听进度 -(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context{ if ([keyPath isEqualToString:NSStringFromSelector(@selector(estimatedProgress))] && object == self.mywebView) { [self.progressView setAlpha:1.0f]; BOOL animated = self.mywebView.estimatedProgress > self.progressView.progress; [self.progressView setProgress:self.mywebView.estimatedProgress animated:animated]; if (self.mywebView.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]; } }
在dealloc方法里移除监听
-(void)dealloc{ [self.mywebView removeObserver:self forKeyPath:NSStringFromSelector(@selector(estimatedProgress))]; }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。