- 在viewDidLoad中，创建loadingView，并添加到self.view上面
2.在结束加载的时候，将loadingView移除
[self initloading];
[self.view addSubview:self.loading];
- (void)initloading
{
UIView *loadingView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, DEAppWidth, DEAppHeight)];
loadingView.backgroundColor = DEColor(245, 245, 245);
UIImageView *logo = [[UIImageView alloc] initWithFrame:CGRectMake(DEAppWidth / 2 - 50, 200, 100, 100)];
[logo setImage:[UIImage imageNamed:@"加载"]];
[loadingView addSubview:logo];
CABasicAnimation *animation =[CABasicAnimation animationWithKeyPath:@"opacity"];
animation.fromValue = [NSNumber numberWithFloat:1.0f];
animation.toValue = [NSNumber numberWithFloat:0.0f];
animation.autoreverses = YES; //回退动画（动画可逆，即循环）
animation.duration = 0.5f;
animation.repeatCount = MAXFLOAT;
animation.removedOnCompletion = NO;
animation.fillMode = kCAFillModeForwards;//removedOnCompletion,fillMode配合使用保持动画完成效果
animation.timingFunction=[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
[logo.layer addAnimation:animation forKey:@"aAlpha"];
UILabel *tips = [[UILabel alloc] initWithFrame:CGRectMake(0, 320, DEAppWidth, 20)];
tips.textColor = DENavBarColorBlue;
tips.text = @"加载中...";
tips.textAlignment = NSTextAlignmentCenter;
tips.font = [UIFont systemFontOfSize:20.0];
[loadingView addSubview:tips];
self.loading = loadingView;
}
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
dispatch_async(dispatch_get_main_queue(), ^{
[self.loading removeFromSuperview];
});
}
图片.png
