Ios Can';t正确显示MBProgressHUD进度动画

Ios Can';t正确显示MBProgressHUD进度动画,ios,objective-c,mbprogresshud,Ios,Objective C,Mbprogresshud,我想在加载内容时显示hud(并显示进度),但不幸的是,它不能正常工作。当statusUpdate为0.100000时,hud显示在屏幕上,但加载栏在statusUpdate未为1.000000且页面加载完成之前不会移动。(成功加载视图后,它从0-100%进行动画制作)如果有人能告诉我我做错了什么,我将不胜感激 // ViewDidLoad [self.webView addObserver:self forKeyPath:@"estimatedProgress" options:NSKe

我想在加载内容时显示hud(并显示进度),但不幸的是,它不能正常工作。当
statusUpdate
0.100000
时,hud显示在屏幕上,但加载栏在
statusUpdate
未为
1.000000
且页面加载完成之前不会移动。(成功加载视图后,它从0-100%进行动画制作)如果有人能告诉我我做错了什么,我将不胜感激

// ViewDidLoad    
[self.webView addObserver:self forKeyPath:@"estimatedProgress" options:NSKeyValueObservingOptionNew context:NULL];

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {

    HUD = [[MBProgressHUD alloc] initWithView:self.view];
    [self.view addSubview:HUD];
    HUD.mode = MBProgressHUDModeDeterminateHorizontalBar;
    HUD.delegate = self;
    HUD.labelText = @"Uploading";

    [HUD show:YES];
    [self hud:self.webView.estimatedProgress];
    if ([keyPath isEqualToString:@"estimatedProgress"] && object == self.webView) {

  //   [self.progressView setAlpha:1.0f];

 //    [self.progressView setProgress:self.webView.estimatedProgress animated:YES];



        NSLog(@"%f", self.webView.estimatedProgress);

   }
    else {
        [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];


          NSLog(@"%f", self.webView.estimatedProgress);
    }
}

- (void) hud: (double)statusUpdate  {

    NSLog(@"STATUS %f", statusUpdate);

    int myInt = (int)statusUpdate;

    HUD.progress = (float)myInt;

}

以下是我以前是如何使用它的:

UIViewController *vc = [UIApplication sharedApplication].keyWindow.rootViewController;

    MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:vc.view animated:YES];
    hud.mode = MBProgressHUDModeAnnularDeterminate;
    hud.progress = 0;
    hud.labelText = NSLocalizedString(@"Loading...", nil);

[operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
        CGFloat progressValue = ((CGFloat)totalBytesRead/(CGFloat)totalBytesExpectedToRead);
        MBProgressHUD *hud = [MBProgressHUD HUDForView:vc.view];
        hud.progress = progressValue;
    }];

除非我遗漏了什么,否则问题出在
-(void)hud:(double)statusUpdate

出于某种原因,您正在将值(
statusUpdate
是一个
double
)转换为
int
,然后再次转换为
float
,这意味着
0.x
值变为
0.0
,而
1.x
值变为
1.0
(这就是为什么HUD只能获得这些值——因为您的范围是0.0/1.0)

简单的修复方法如下所示:

- (void) hud: (double)statusUpdate  {

    NSLog(@"STATUS %f", statusUpdate);

    HUD.progress = statusUpdate;

}

也许你可以使用CADisplayLink创建一些类似动画的东西。它会更新你的HUD

@interface ViewController () {
    CADisplayLink *displayLink;
}
- (void)displayLinkMethod {    
    displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(animationMethod)];
        [displayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes];
}