前言

    NS_CLASS_AVAILABLE_IOS(2_0) @interface UIActivityIndicatorView : UIView <NSCoding>@available(iOS 2.0, *)       public class UIActivityIndicatorView : UIView, NSCoding

1、ActivityIndicatorView 的创建

• Objective-C

      UIActivityIndicatorView *activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];// 将风火轮添加到 view 上[self.view addSubview:activityIndicator];// 开始转圈[activityIndicator startAnimating];

• Swift

      let activityIndicator:UIActivityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: .Gray)// 将风火轮添加到 view 上self.view.addSubview(activityIndicator)// 开始转圈activityIndicator.startAnimating()

2、ActivityIndicatorView 的设置

• Objective-C

      // 设置位置activityIndicator.center = self.view.center;// 设置类型/*UIActivityIndicatorViewStyleGray          // 灰色UIActivityIndicatorViewStyleWhite         // 白色UIActivityIndicatorViewStyleWhiteLarge    // 白色，尺寸较大*/activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyleGray;// 设置颜色/*默认为灰色*/activityIndicator.color = [UIColor redColor];// 设置停止转圈时是否隐藏/*default is YES*/activityIndicator.hidesWhenStopped = NO;// 获取是否在转圈BOOL animating = activityIndicator.isAnimating;// 开始转圈[activityIndicator startAnimating];// 停止转圈[activityIndicator stopAnimating];

• Swift

      // 设置位置activityIndicator.center = self.view.center// 设置类型/*case Gray          // 灰色case White         // 白色case WhiteLarge    // 白色，尺寸较大*/activityIndicator.activityIndicatorViewStyle = .Gray// 设置颜色/*默认为灰色*/activityIndicator.color = UIColor.redColor()// 设置停止转圈时是否隐藏/*default is YES*/activityIndicator.hidesWhenStopped = false// 获取是否在转圈let animating:Bool = activityIndicator.isAnimating()// 开始转圈activityIndicator.startAnimating()// 停止转圈activityIndicator.stopAnimating()

3、状态栏上网络状态风火轮的设置

• Objective-C

      // 设置旋转状态/*YES 旋转，NO 不旋转，不旋转时默认隐藏*/[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;

• Swift

      // 设置旋转状态/*true 旋转，false 不旋转，不旋转时默认隐藏*/UIApplication.sharedApplication().networkActivityIndicatorVisible = true

4、Storyboard 中设置

• 在 Storyboard 场景中设置

  • Activity Indicator View 设置

    

    Style                   |  类型

    --------------------------|-------------
    Color | 颜色
    Behavior |
    -- Animating | 开始旋转
    -- Hides When Stopped | 停止时隐藏