更新代码

.travis.yml

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+language: objective-c
+osx_image: xcode7.3
+xcode_project: ZFDownload.xcodeproj

README.md

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 # ZFDownload
-iOS download 
+
+<p align="left">
+<a href="https://travis-ci.org/renzifeng/ZFDownload"><img src="https://travis-ci.org/renzifeng/ZFDownload.svg?branch=master"></a>
+<a href="https://img.shields.io/cocoapods/v/ZFDownload.svg"><img src="https://img.shields.io/cocoapods/v/ZFDownload.svg"></a>
+<a href="https://img.shields.io/cocoapods/v/ZFDownload.svg"><img src="https://img.shields.io/github/license/renzifeng/ZFDownload.svg?style=flat"></a>
+<a href="http://cocoadocs.org/docsets/ZFDownload"><img src="https://img.shields.io/cocoapods/p/ZFDownload.svg?style=flat"></a>
+<a href="http://weibo.com/zifeng1300"><img src="https://img.shields.io/badge/weibo-@%E4%BB%BB%E5%AD%90%E4%B8%B0-yellow.svg?style=flat"></a>
+</p>
+
+## 特性
+* 支持断点下载
+* 异常退出，再次打开保留下载进度
+* 实时下载进度
+* 实时下载速度
+
+## 要求
+* iOS 7+
+* Xcode 6+
+
+## 效果图
+
+![图片效果演示](https://github.com/renzifeng/ZFDownload/raw/master/ZFDownload.gif)
+
+## 安装
+### Cocoapods
+
+```ruby
+pod 'ZFDownload'
+```
+
+## 使用
+```objc
+ [[ZFDownloadManager sharedInstance] download:urlString progress:^(CGFloat progress, NSString *speed, NSString *remainingTime, NSString *writtenSize, NSString *totalSize) {
+            dispatch_async(dispatch_get_main_queue(), ^{
+				// insert code here
+            });
+ } state:^(DownloadState state) {}];
+
+```
+在cell上获取实时下载进度，遵守 ZFDownloadDelegate代理，然后实现
+
+```objc
+#pragma mark - ZFDownloadDelegate
+
+- (void)downloadResponse:(ZFSessionModel *)sessionModel
+{
+    if (self.downloadObjectArr) {
+        // 取到对应的cell上的model
+        NSArray *downloadings = self.downloadObjectArr[1];
+        if ([downloadings containsObject:sessionModel]) {
+            
+            NSInteger index = [downloadings indexOfObject:sessionModel];
+            NSIndexPath *indexPath = [NSIndexPath indexPathForRow:index inSection:1];
+            __block ZFDownloadingCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
+            __weak typeof(self) weakSelf = self;
+            sessionModel.progressBlock = ^(CGFloat progress, NSString *speed, NSString *remainingTime, NSString *writtenSize, NSString *totalSize) {
+                dispatch_async(dispatch_get_main_queue(), ^{
+                    cell.progressLabel.text   = [NSString stringWithFormat:@"%@/%@ (%.2f%%)",writtenSize,totalSize,progress*100];
+                    cell.speedLabel.text      = speed;
+                    cell.progress.progress    = progress;
+                    cell.downloadBtn.selected = YES;
+                });
+            };
+            
+            sessionModel.stateBlock = ^(DownloadState state){
+                dispatch_async(dispatch_get_main_queue(), ^{
+                    // 更新数据源
+                    if (state == DownloadStateCompleted) {
+                        [weakSelf initData];
+                        cell.downloadBtn.selected = NO;
+                    }
+                    // 暂停
+                    if (state == DownloadStateSuspended) {
+                        cell.speedLabel.text = @"已暂停";
+                        cell.downloadBtn.selected = NO;
+                    }
+                });
+            };
+        }
+    }
+}
+```
+
+# 联系我
+- 微博: [@任子丰](https://weibo.com/zifeng1300)
+- 邮箱: [email protected]
+- QQ群：213376937
+
+# License
+
+ZFDownload is available under the MIT license. See the LICENSE file for more info.

ZFDownload.podspec

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+Pod::Spec.new do |s|
+    s.name         = 'ZFDownload'
+    s.version      = '0.0.1'
+    s.summary      = 'Download manager based on NSURLSession'
+    s.homepage     = 'https://github.com/renzifeng/ZFDownload'
+    s.license      = 'MIT'
+    s.authors      = { 'renzifeng' => '[email protected]' }
+    s.platform     = :ios, '8.0'
+    s.source       = { :git => 'https://github.com/renzifeng/ZFDownload.git', :tag => s.version.to_s }
+    s.source_files = 'ZFDownload/**/*.{h,m}'
+    s.framework    = 'UIKit'
+    s.requires_arc = true
+end