UIKit之UIActivityIndicatorView

#import "TestController.h"

@interface TestController ()

@property(strong, nonatomic)UIActivityIndicatorView *activityIndicator;
@end

@implementation TestController

- (void)viewDidLoad {
    [super viewDidLoad];
 
    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
    button.frame = CGRectMake(0,0,100, 100);
    button.center = self.view.center;
    button.backgroundColor = [UIColor redColor];
    [self.view addSubview:button];
    [button bk_addEventHandler:^(id  _Nonnull sender) {
        self.activityIndicator.isAnimating ? [self.activityIndicator startAnimating]:[self.activityIndicator stopAnimating];
    } forControlEvents:UIControlEventTouchUpInside];
    
}


#pragma mark - lazyload
- (UIActivityIndicatorView *)activityIndicator{
    if (!_activityIndicator) {
        _activityIndicator = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
        [self.view addSubview:_activityIndicator];

        // 开始动画
        [_activityIndicator startAnimating];
        // 结束动画
        [_activityIndicator stopAnimating];
        // 获取小菊花的是否在旋转
        BOOL isActive = _activityIndicator.isAnimating;
        // 当小菊花停止的时候隐藏
        _activityIndicator.hidesWhenStopped = NO;// default YES
        // 设置小菊花View的外观
        _activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyleGray;
        // 设置小菊花的颜色
        _activityIndicator.color = [UIColor redColor];
        // 设置一个按钮控制 小菊花的旋转
        [_activityIndicator mas_makeConstraints:^(MASConstraintMaker *make) {
            make.left.top.offset(100);
        }];
    }
    return _activityIndicator;
}

@end