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  • DZNEmptyDataSet框架简介

    给大家推荐一个设置页面加载失败时显示加载失败等的框架。

    下载地址:DZNEmptyDataSet https://github.com/dzenbot/DZNEmptyDataSet

    上效果
    首先在你的ViewController里面导入
    #import "UIScrollView+EmptyDataSet.h"
    遵守 <DZNEmptyDataSetSource, DZNEmptyDataSetDelegate> 协议

    `@interface MainViewController : UITableViewController <DZNEmptyDataSetSource, DZNEmptyDataSetDelegate>

    • (void)viewDidLoad
      {
      [super viewDidLoad];
      self.tableView.emptyDataSetSource = self;
      self.tableView.emptyDataSetDelegate = self; // A little trick for removing the cell separators self.tableView.tableFooterView = [UIView new];
      }`

    返回单张图片

    Data Source 实现方法
    - (UIImage *)imageForEmptyDataSet:(UIScrollView *)scrollView { return [UIImage imageNamed:@"empty_placeholder"]; }

    返回标题文字

    - (NSAttributedString *)titleForEmptyDataSet:(UIScrollView *)scrollView { NSString *text = @"Please Allow Photo Access"; NSDictionary *attributes = @{NSFontAttributeName: [UIFont boldSystemFontOfSize:18.0f], NSForegroundColorAttributeName: [UIColor darkGrayColor]}; return [[NSAttributedString alloc] initWithString:text attributes:attributes]; }

    返回详情文字

    - (NSAttributedString *)descriptionForEmptyDataSet:(UIScrollView *)scrollView{ NSString *text = @"This allows you to share photos from your library and save photos to your camera roll."; NSMutableParagraphStyle *paragraph = [NSMutableParagraphStyle new]; paragraph.lineBreakMode = NSLineBreakByWordWrapping; paragraph.alignment = NSTextAlignmentCenter; NSDictionary *attributes = @{NSFontAttributeName: [UIFont systemFontOfSize:14.0f], NSForegroundColorAttributeName: [UIColor lightGrayColor], NSParagraphStyleAttributeName: paragraph}; return [[NSAttributedString alloc] initWithString:text attributes:attributes]; }

    返回可以点击的按钮 上面带文字

    - (NSAttributedString *)buttonTitleForEmptyDataSet:(UIScrollView *)scrollView forState:(UIControlState)state{ NSDictionary *attributes = @{NSFontAttributeName: [UIFont boldSystemFontOfSize:17.0f]}; return [[NSAttributedString alloc] initWithString:@"Continue" attributes:attributes];}

    返回可以点击的按钮 上面带图片

    - (UIImage *)buttonImageForEmptyDataSet:(UIScrollView *)scrollView forState:(UIControlState)state{ return [UIImage imageNamed:@"button_image"];}

    返回空白区域的颜色自定义

    - (UIColor *)backgroundColorForEmptyDataSet:(UIScrollView *)scrollView{ return [UIColor whiteColor];}

    返回一个自定义的 view

    • (UIView )customViewForEmptyDataSet:(UIScrollView )scrollView{ UIActivityIndicatorView *activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray]; [activityView startAnimating]; return activityView;}

    此外,您还可以调整垂直对齐的内容视图(即:有用tableHeaderView时可见):

    - (CGFloat)verticalOffsetForEmptyDataSet:(UIScrollView *)scrollView{ return -self.tableView.tableHeaderView.frame.size.height/2.0f;}

    返回间距离

    • (CGFloat)verticalOffsetForEmptyDataSet:(UIScrollView *)scrollView{ return -self.tableView.tableHeaderView.frame.size.height/2.0f;}

    委托实现

    要求知道空的状态应该渲染和显示 (Default is YES) :
    - (BOOL)emptyDataSetShouldDisplay:(UIScrollView *)scrollView{ return YES;}

    是否允许点击 (默认是 YES) :
    - (BOOL)emptyDataSetShouldAllowTouch:(UIScrollView *)scrollView{ return YES;}

    是否允许滚动 (默认是 NO) :
    - (BOOL)emptyDataSetShouldAllowScroll:(UIScrollView *)scrollView{ return YES;}

    空白区域点击响应:
    - (void)emptyDataSetDidTapView:(UIScrollView *)scrollView{ // Do something}

    点击button 响应
    - (void)emptyDataSetDidTapButton:(UIScrollView *)scrollView{ // Do something}

    刷新当前表格
    [self.tableView reloadData];
    或者
    [self.collectionView reloadData];

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  • 原文地址:https://www.cnblogs.com/Hakim/p/DZNEmptyDataSet.html
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