分页控制（是pagecontrol不是pagecontroller）和手势操作

最新推荐文章于 2024-08-23 09:49:24 发布

原创最新推荐文章于 2024-08-23 09:49:24 发布 · 1.1k 阅读

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本文介绍如何在iOS应用中实现左右滑动切换不同城市天气的功能，包括使用UISwipeGestureRecognizer处理滑动事件及更新UIPageControl显示当前页码。

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    self.recognizerRight = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];
    self.recognizerLeft = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];
    
    [self.recognizerLeft setDirection:UISwipeGestureRecognizerDirectionLeft];
    [self.view addGestureRecognizer:self.recognizerLeft];
    
    [self.recognizerRight setDirection:UISwipeGestureRecognizerDirectionRight];

<p style="margin-top: 0px; margin-bottom: 0px; font-size: 18px; font-family: Menlo; color: rgb(0, 175, 202);"><pre name="code" class="objc"> self.pg = [[UIPageControl alloc]initWithFrame:CGRectMake(viewBounds.origin.x, viewBounds.origin.y, viewBounds.size.width,
                                                             60)];
    self.pg.backgroundColor = [UIColor grayColor];
    self.pg.alpha = 0.1;
    self.pg.numberOfPages = 5;
    self.pg.currentPage = 0;
      [self.view addSubview:self.pg];

-(void)handleSwipeFrom:(UISwipeGestureRecognizer *)recongnizer
{
     int page = self.pg.currentPage ;
    if (recongnizer.direction == UISwipeGestureRecognizerDirectionLeft) {
        NSLog(@"left");
       
        page--;
        if (page<0) return;
        else
            self.pg.currentPage = page;
        
    }
    if (recongnizer.direction == UISwipeGestureRecognizerDirectionRight) {
        NSLog(@"right");
        page++;
        if (page >4) return;
        else
            self.pg.currentPage = page;
        
    }
    
    switch (self.pg.currentPage) {
        case 0:
            [self getWeatherDataByCityname:@"南京"];
            break;
        case 1:
            [self getWeatherDataByCityname:@"北京"];
            break;
        case 2:
            [self getWeatherDataByCityname:@"上海"];
            break;
        case 3:
            [self getWeatherDataByCityname:@"广州"];
            break;
        case 4:
            [self getWeatherDataByCityname:@"深圳"];
            break;
        default:
            break;
    }
    
    [self setTheCurrentMessage:self.weatherCurrentData];
    [self.tableView reloadData];

}