类似于手机qq空间的下拉tableView上面的图片放大的功能的实现

最新推荐文章于 2020-07-26 17:38:34 发布

原创最新推荐文章于 2020-07-26 17:38:34 发布 · 1.6k 阅读

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本文介绍了一个名为 SlimeRefresh 的 iOS 下拉刷新组件的使用方法，包括引入头文件、添加代理、实例化刷新视图及配置外观属性等步骤，并提供了代理方法的实现示例。

https://github.com/dbsGen/SlimeRefresh

1、引入头文件#import "SRRefreshView.h"
2、添加代理<UIScrollViewDelegate,SRRefreshDelegate>
3、实例化SRRefreshView

    SRRefreshView *_slimeRefreshView=[[SRRefreshView alloc]init];
    _slimeRefreshView.delegate=self;
    _slimeRefreshView.upInset=44;
    _slimeRefreshView.slimeMissWhenGoingBack=YES;
    _slimeRefreshView.slime.bodyColor=[UIColor blackColor];
    _slimeRefreshView.slime.skinColor=[UIColor whiteColor];
    _slimeRefreshView.slime.lineWith=1;
    _slimeRefreshView.slime.shadowBlur=4;
    _slimeRefreshView.slime.shadowColor=[UIColor blackColor];
    [_tableView addSubview:_slimeRefreshView];

4、写代理

#pragma mark-UIScrollViewDelegate
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    CGFloat yOffset   = scrollView.contentOffset.y;
    
    if (yOffset < 0) {
        CGFloat ImageWidth = APP_WIDTH;
        CGFloat factor = ((ABS(yOffset)+205)*ImageWidth)/205;
        CGRect f = CGRectMake(-(factor-ImageWidth)/2, 0, factor, 205+ABS(yOffset));
        _bgImgView.frame = f;
        NSLog(@"下拉contentOffset.y小于0");
    } else {
        CGRect f = _bgImgView.frame;
        f.origin.y = -yOffset;
        _bgImgView.frame = f;
        NSLog(@"上拉contentOffset.y大于0");
    }

}
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
    [_slimeRefreshView scrollViewDidEndDraging];
}
#pragma mark - slimeRefresh delegate

- (void)slimeRefreshStartRefresh:(SRRefreshView *)refreshView
{
//    [self requestBasePersonalInfo:YES];
}

注意事项：

    UIImageView *_bgImgView=[LGImageView CreateLGImageView:CGRectMake(0,0,APP_WIDTH,205)
                                    imageName:@"myBgImg"
                           interactionEnabled:YES];
    
    [self.view addSubview:_bgImgView];

UIView *_headerView=[LGView CreateLGView:CGRectMake(0,0,APP_WIDTH,205+USER_HEADER_IMAGEVIEW_SIZE/2)
                                      WithBgColor:[UIColor clearColor]
                                 withCornerRadius:0
                                  withBorderWidth:0
                                  withBorderColor:nil];
    _tableView.tableHeaderView=_headerView;
    
    {
        UIView *tempView = [[UIView alloc] initWithFrame:CGRectMake(0, 205, APP_WIDTH, 40)];
        tempView.backgroundColor = [UIColor whiteColor];
        [_headerView addSubview:tempView];
        CGRect frame = _headerView.frame;
        frame.size.height = CGRectGetMaxY(tempView.frame);
        _headerView.frame = frame;
        
    }