#import "ViewController.h"

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UIScrollView *scrollView;

@property (weak, nonatomic) IBOutlet UILabel *secondLabel;

@property (assign, nonatomic) BOOL available;

@implementation ViewController

- (void)viewDidLoad

{

[super viewDidLoad];

// 1 先判断系统版本

if ([NSProcessInfo.processInfo isOperatingSystemAtLeastVersion:(NSOperatingSystemVersion){10,0,0}])

{

// 2 初始化

UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];

// 3.1 配置刷新控件

refreshControl.tintColor = [UIColor brownColor];

NSDictionary *attributes = @{NSForegroundColorAttributeName : [UIColor redColor]};

refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:@"Pull To Refresh" attributes:attributes];

// 3.2 添加响应事件

[refreshControl addTarget:self action:@selector(refresh:) forControlEvents:UIControlEventValueChanged];

// 4 把创建的refreshControl赋值给scrollView的refreshControl属性

self.scrollView.refreshControl = refreshControl;

}

}

- (void)refresh:(UIRefreshControl *)sender

{

self.available = ! self.available;

self.secondLabel.hidden = self.available;

// 停止刷新

[sender endRefreshing];

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}