上拉刷新，下拉加载

Posted 2022-11-30 kaihaOS

1.上来加载，下拉刷新数据；

a。导入Refresh文件夹 

b。导入头文件：

#import "UIScrollView+MJRefresh.h"

c。添加调用方法

#pragma mark-

#pragma mark-上拉加载，下拉刷新

-(void)setupRefresh

    // 1.下拉刷新(进入刷新状态就会调用self的headerRereshing)

   [_table addHeaderWithTarget:self action:@selector(headerRereshing)];

//#warning 自动刷新(一进入程序就下拉刷新)

    [self.table headerBeginRefreshing];

    

//    // 2.上拉加载更多(进入刷新状态就会调用self的footerRereshing)

//    [self.table addFooterWithTarget:self action:@selector(footerRereshing)];

#pragma mark 开始进入刷新状态

- (void)headerRereshing

    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0 *NSEC_PER_SEC)),dispatch_get_main_queue(), ^

         [self.table reloadData];

           // (最好在刷新表格后调用)调用endRefreshing可以结束刷新状态

        [self.table headerEndRefreshing];

    );

- (void)footerRereshing

 // 2.2秒后刷新表格UI

    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^

        //刷新表格

        [self.table reloadData];               

 // (最好在刷新表格后调用)调用endRefreshing可以结束刷新状态

        [self.table footerEndRefreshing];

    );

d。在viewdidload里调用方法

[self setupRefresh];

2。图片缓存 a.导入文件夹 SDWebimage； b，引头文件：

#import "UIImageView+WebCache.h"

c。在要用到图片时可以这样调用：

  NSURL *url =[NSURL URLWithString:[dic objectForKey:@"pictureUrl"]];

    [cell.image setImageWithURL:url];

3.抽屉效果及按钮控制

a。导入文件夹ICSDrawerController。

b。引入头文件：

//#import "ICSDrawerController.h"

//#import "ICSDropShadowView.h"

c。在AppDelegate.m中

 LeftViewController *left = [[LeftViewController alloc] init];

    UINavigationController *nav5 = [[UINavigationController alloc] initWithRootViewController:left];

    RightViewController *right = [[RightViewController alloc] init];

//    UINavigationController *nav6 = [[UINavigationController alloc] initWithRootViewController:right];

    ICSDrawerController *drawer = [[ICSDrawerController alloc] initWithLeftViewController:nav5 centerViewController:bar];

    right.drawer = drawer;

    [self.window setRootViewController:drawer];

    [drawer release];

    [left release];

    [right release];

d.在 RightViewController中应该写

 self.openDrawerButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];

    [ self.openDrawerButton setTitle:@"点我" forState:UIControlStateNormal];

    

   //[self.openDrawerButton setBackgroundImage:[UIImage imageNamed:@"leftaaaa"] forState:UIControlStateNormal];

    [ self.openDrawerButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];

    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView: self.openDrawerButton];

    [ self.openDrawerButton addTarget:self action:@selector(openDrawer:) forControlEvents:UIControlEventTouchUpInside];

    [ self.openDrawerButton release];

- (void)openDrawer:(id)sender

if ([str isEqualToString:@"0"])

        [self.drawer open];

        

    else

        [self.drawer close];