摘要:
分了三个任务下载每张图片,同时写入文件 viewController.m DownLoadManager.m DownLoadTask.m PictureCell.m 阅读全文
摘要:
#import "ViewController.h" @interface ViewController ()<NSURLSessionDelegate,NSURLSessionTaskDelegate,NSURLSessionDataDelegate> @property (weak, nonat 阅读全文