Question

我是新来学习目标-c。我想在显示来自服务器的图片时向每个UIActivity添加UITableViewCell指标，并在finishedloading.

时隐藏它们

请帮我提供一些示例代码。

非常感谢。

Answer 1

您可以在图像视图中添加活动指示器，并在图像从服务器开始加载时开始动画，当您从服务器获得实际图像时停止动画。请尝试以下代码

UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
indicator.center = imageView.center;// it will display in center of image view
[iamgeView addSubview:indicator];    
[indicator startAnimating]

有图像时请致电[indicator stopAnimating]。

在表格视图单元格中放置动画： //你设置placehod更好

[imageView setImageWithURL:[NSURL URLWithString:imageURL]
               placeholderImage:[UIImage imageNamed:@"if any "]
                        success:^(UIImage *image) {
                            // remove animation
                          [indicator stopAnimating];
                          [indicator removeFromSuperview];

                        }
                        failure:^(NSError *error) {

                            // handle failed download

  }];

Answer 2

请参阅以下链接

https://developer.apple.com/library/ios/samplecode/LazyTableImages/Introduction/Intro.html

https://github.com/rs/SDWebImage

Lazy Load cell image for programmatically created tableview

http://www.markj.net/iphone-asynchronous-table-image/

http://www.hollance.com/2011/03/mhlazytableimages-efficiently-load-images-for-large-tables/#！

如何将UIActivity Indicator添加到每个自定义UItableviewCell

2 个答案: