NSCache is a mutable dictionary that you could use to cache some data that are expensive to create, so it could improve your app performance. If memory is needed by other applications, it would remove some items from the cache, minimizing its memory footprint, then some values need to be

You might find out that the private method of UIView recursiveDescription is useful, especially when you want to debug your view hierarchy. You could run the following command from the LLDB prompt in Xcode: po view.value(forKey: "recursiveDescription")! It would print the view hierarchy for you, all the views

There is an instance method of UIScrollView called setContentOffset(_:animated:) [https://developer.apple.com/documentation/uikit/uiscrollview/1619400-setcontentoffset] . As UITableView is a subclass of UIScrollView, you could also use this method. If you need to scroll the table view to the top, you just call this method like below: tableView.

As you already know that Swift 3 is released [https://swift.org/blog/swift-3-0-released/], I guess you guys are busy migrating your project to Swift 3 now. So this post I just list some issues I came across during migrating to Swift 3. 1.Instance method 'application(:didFinishLaunchingWithOptions:)' nearly

Swift是Apple在今年的WWDC推出的一门新的编程语言，它的1.0版本跟着Xcode 6正式发布了。本文主要列出一些关于Swift的学习资源。 * Apple官方推出的iBook The Swift Programming Language [https://itunes.apple.com/us/book/the-swift-programming-language/id881256329?mt=11&ls=1] web版 The Swift Programming Language [https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/] * Using Swift with Cocoa and Objective-C [https://developer.apple.com/library/