iOS开发——项目实战Swift篇&swift 2.0项目开发总结一（开发常用）

swift 2.0项目开发总结一（开发常用）

一：新特性（版本判断）的实现

 1 let versionStr = "CFBundleShortVersionString"
 2     let cureentVersion = NSBundle.mainBundle().infoDictionary![versionStr] as! String
 3     let oldVersion = (NSUserDefaults.standardUserDefaults().objectForKey(versionStr) as? String) ?? ""
 4
 5     if cureentVersion.compare(oldVersion) == NSComparisonResult.OrderedDescending {
 6     NSUserDefaults.standardUserDefaults().setObject(cureentVersion, forKey: versionStr)
 7     NSUserDefaults.standardUserDefaults().synchronize()
 8     return LeadpageViewController()
 9     }
10  

二：重写导航栏的push方法，实现左右按钮的统一和个性化

 1 if self.childViewControllers.count > 0 {
 2       let vc = self.childViewControllers[0]
 3
 4       if self.childViewControllers.count == 1 {
 5           backBtn.setTitle(vc.tabBarItem.title!, forState: .Normal)
 6       } else {
 7           backBtn.setTitle("返回", forState: .Normal)
 8       }
 9
10       viewController.navigationItem.leftBarButtonItem = UIBarButtonItem(customView: backBtn)
11       viewController.hidesBottomBarWhenPushed = true
12   }
13
14   super.pushViewController(viewController, animated: animated)
15
16  

三：iOS8中新的计算cell高度的方法结合Xib中底部约束

1 // 估算cell的高度
2       tableV.estimatedRowHeight = 200
3        // 设置tableView的自动布局样式
4       tableV.rowHeight = UITableViewAutomaticDimension