tuxi / NODataPlaceholderView

A UITableView and UICollectionView are used to display categories when there is no data.

The UI use of auto layout, support screen adaptation

Quick Start

1.In your [Podfile]:

pod 'NODataPlaceholderView', '~> 1.0.5'

Or move 'UIScrollView+NoDataExtend' to your project

2.#Import "UIScrollView+NoDataExtend.h"

Documentation

• 根据需求设置空视图

- (void)setupNodataView {
    __weak typeof(self) weakSelf = self;
    
    self.tableView.noDataPlaceholderDelegate = self;
    
    self.tableView.noDataTextLabelBlock = ^(UILabel * _Nonnull textLabel) {
        textLabel.backgroundColor = [UIColor clearColor];
        textLabel.font = [UIFont systemFontOfSize:27.0];
        textLabel.textColor = [UIColor colorWithWhite:0.6 alpha:1.0];
        textLabel.textAlignment = NSTextAlignmentCenter;
        textLabel.lineBreakMode = NSLineBreakByWordWrapping;
        textLabel.numberOfLines = 0;
        textLabel.attributedText = [weakSelf attributedStringWithText:@"没有正在下载的歌曲" color:[UIColor grayColor] fontSize:16];;
    };
    
    self.tableView.noDataDetailTextLabelBlock = ^(UILabel * _Nonnull detailTextLabel) {
        detailTextLabel.backgroundColor = [UIColor clearColor];
        detailTextLabel.font = [UIFont systemFontOfSize:17.0];
        detailTextLabel.textColor = [UIColor colorWithWhite:0.6 alpha:1.0];
        detailTextLabel.textAlignment = NSTextAlignmentCenter;
        detailTextLabel.lineBreakMode = NSLineBreakByWordWrapping;
        detailTextLabel.numberOfLines = 0;
        detailTextLabel.attributedText = [weakSelf attributedStringWithText:@"可以去下载历史，批量找回下载过的歌曲" color:[UIColor grayColor] fontSize:16];
    };
    
    
    
    self.tableView.noDataImageViewBlock = ^(UIImageView * _Nonnull imageView) {
        imageView.backgroundColor = [UIColor clearColor];
        imageView.contentMode = UIViewContentModeScaleAspectFit;
        imageView.userInteractionEnabled = NO;
        imageView.image = [UIImage imageNamed:@"qqMusic_empty"];

    };
    
    self.tableView.noDataReloadButtonBlock = ^(UIButton * _Nonnull reloadButton) {
        reloadButton.backgroundColor = [UIColor clearColor];
        reloadButton.layer.borderWidth = 0.5;
        reloadButton.layer.borderColor = [UIColor colorWithRed:49/255.0 green:194/255.0 blue:124/255.0 alpha:1.0].CGColor;
        reloadButton.layer.cornerRadius = 2.0;
        [reloadButton.layer setMasksToBounds:YES];
        [reloadButton setAttributedTitle:[weakSelf attributedStringWithText:@"查看下载历史" color:[UIColor colorWithRed:49/255.0 green:194/255.0 blue:124/255.0 alpha:1.0] fontSize:15.0] forState:UIControlStateNormal];
        [reloadButton setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];

    };
    

    self.tableView.noDataTextEdgeInsets = UIEdgeInsetsMake(20, 0, 20, 0);
    self.tableView.noDataButtonEdgeInsets = UIEdgeInsetsMake(20, 100, 11, 100);
}

---

• 模拟请求数据

/// 以下模拟从服务器请求数据
- (void)getDataFromServer {

    // 请求数据前执行此方法，显示加载中的loading，如果不需要加载中的loading，可不执行此方法
    [self.tableView xy_beginLoading];
    
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        // 模拟数据请求完成
        [self loadSectionData];
    });
}

- (void)loadSectionData {

    [_dataArray removeAllObjects];
    
    NSMutableArray *sec1 = [NSMutableArray array];
    [_dataArray addObject:sec1];
    NSMutableArray *sec2 = [NSMutableArray array];
    [_dataArray addObject:sec2];
    
    for (NSInteger i = 0; i < 3; i++) {
        [sec1 addObject:@(i)];
        [sec2 addObject:@(i)];
    }
    
    if (_dataArray.count == 0) {
        [self.tableView reloadData];
        return;
    }
    [self.tableView beginUpdates];
    [self.tableView insertSections:[NSIndexSet indexSetWithIndex:0] withRowAnimation:UITableViewRowAnimationFade];
    [self.tableView insertSections:[NSIndexSet indexSetWithIndex:1] withRowAnimation:UITableViewRowAnimationFade];
    [self.tableView endUpdates];
}

---

• 代理回调

////////////////////////////////////////////////////////////////////////
#pragma mark - NoDataPlaceholderDelegate
////////////////////////////////////////////////////////////////////////

- (void)noDataPlaceholder:(UIScrollView *)scrollView didClickReloadButton:(UIButton *)button {
    [self getDataFromServer];
}

- (BOOL)noDataPlaceholderShouldAllowScroll:(UIScrollView *)scrollView {
    return YES;
}

- (void)noDataPlaceholder:(UIScrollView *)scrollView didTapOnContentView:(UITapGestureRecognizer *)tap {
    [self getDataFromServer];
}


- (CGPoint)contentOffsetForNoDataPlaceholder:(UIScrollView *)scrollView {
    if ([UIDevice currentDevice].orientation == UIDeviceOrientationPortrait) {
        return CGPointMake(0.0, 80.0);
    }
    return CGPointMake(0.0, 30.0);
}


- (void)noDataPlaceholderWillAppear:(UIScrollView *)scrollView {
    self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
    
}

- (void)noDataPlaceholderDidDisappear:(UIScrollView *)scrollView {
    self.tableView.separatorStyle = UITableViewCellSeparatorStyleSingleLine;
}

- (BOOL)noDataPlaceholderShouldFadeInOnDisplay:(UIScrollView *)scrollView {
    return YES;
}

---