iOS9 brings many new features to make our life easier development,Stack Views profile is a good example. Before you give a brief introduction of the auto layout. Let us work together in this example is simple, but,With your app UI becomes more complex,You will find all the iOS devices to provide the perfect interface constraints become more difficult. This is Apple's most[……]
Swift is already open source version 2.2 It's，However, with respect to 2.1 No particular improvement。Swift now supports OS X and Ubuntu，Supported on Ubuntu 14.04 and 15.10 Two versions，You canThis pageDownload the latest version compile(There is no official stable version)Now I will talk about how to use it on both platforms。[……]
Swift is now open source。Apple today launched the open source community Swift，New tools and resources include the same stunning：
In retrospect，I am now off and on since May begin to learn language Swift are nearly six months，From the program have no feeling at all，To the present"Open practice"，Experienced a lot of。Might say for a master who worked for many years，These are too shallow，The phrase "you needProject experience"You can kill me blood slot-1，But for most, like me, "small white"，I think I walked half way can be complex[……]
During the development time，You will inevitably use a random number。And still more when，We need to generate a series of random numbers numeric string spare。Fortunately, however, a variety of programming language provides a simple and easy to use pseudo-random number generator for your use，For example, in the C # Random。
but，C # is the default system clock Random seed - this method is simple and crude，Unfortunately, the event generated a lot over a short time[……]
Sometimes we do a simple placeholder page out，This page does not need any of the content，Simply a background image to chapter，But simple things are often more difficult to achieve。
This is what I wrote a page directly encountered problems，Code like this：
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Coming soon...</title> </head> <body> <div id="Layer1" style="position:absolute; width:100%; height:100%; z-index:-1"> <img src="BJ.jpg" height="100%" width="100%"/> </div> </body> </html> |
It looks perfect solution, right? But actually encounter[……]
First, this translation is not an open source translation，According to the future income from donations，Members will be compensated (perhaps not
Secondly, as a contributor to translate your cool is a prerequisite。
In Xcode 6.3 in，We worked Objective-C adds new Null tag Language features。This feature gives a Objective-C language and the same expression Swift empty and non-empty kind of API Interface。Xcode 7 Through the introduction to Objective-C lightweight generic module allows Objective-C and Swif[……]
Generics are another important object-oriented concepts in，In addition to multi-state，It further increases the range of reuse code，For Swift language,，Generics throughout its always。
We start from the first day of class in the use of this global function，It allows us to show the statement on the screen，Very simple to use，It can pass a string。
Incoming string displayed string[……]
This lesson we get to know about the Swift error handling
In calling the method and the time to write a wheel，There will always be wrong sorts of weird，Normal is already compiled software，Some unexpected errors also occur。but，Among these errors，There are some that can be identified and captured - they can be expected。
Why do we say that there are some errors that can be expected to get it? For example,[……]
we all know，The method is put in the running instance。That is the result of the implementation of the method is based on the instance property came，The property is an example of the current state of change - we call it "dynamic"。
But really all it is dynamic? In fact, not，Some methods give results which will directly and according to your call，It does not need to generate change according to the change instance attributes - that it is produced anyway[……]
In front of so many bedding，Now finally we want to address this thing the garbage collector。
This is not the Ark ...... This is automatic reference counting (Automatic Reference Counting)，This thing is used to manage Apple memory。
Its function is that the garbage collector on the garbage heap。It would not have been able to ensure that all heap objects that reside in the running to be released in the heap。Ensures that[……]
At the end of the previous lesson，We finally made clear the process of creating an object，Then，Speaking create an object looks like is to call a method，This method may in the end what is it?
Not wrong，When we initialize a class object when，We did call a method - initializer。
Initializer method is actually a special provision of the，It is possible for the class to initialize。
Let's imagine，[……]
It's time to look at the living space objects and methods - and want to learn object-oriented，I do not know where to put the methods and objects is a very embarrassing thing - after all, we still have to face the garbage collector，Want to make the garbage collector to help you do more，We have to understand its working mechanism to some extent，Learn how and where to store objects，if not，You have to write a program to the vulnerable!
Courses in front of us[……]
Last time we mentioned agreement，But we talk about it the way an application，This lesson we take a deeper look at this class and used up almost exactly what profound esoteric protocol。
Now，We again review the shameful inheritance tree once：
Here we wrote a weapon ...... is used for attack and defense。Then，As a game，Model weapons can not just only in one place[……]
Rewriting said method，We come back to look at the inheritance tree：
This should look okay，We can create an instance of the sword，Create an instance of a pistol ......
But if I have to write it?
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var 武器 = 武器() |
So the question is：excavator……
Do not，Our problem is "weapon" in the end is what?[……]
Said so many times rewriting，This time we have to rewrite treat seriously what method。
We say，Inheritance is the equivalent of signing a contract，We inherited out of the subclass must comply with this contract，So even if you want to do something where no contract，Must comply with contract specifications，so，You override methods，It must also comply with the type of process。
We talked about the type of approach，It ()->() Such[……]
We finished the last lesson inheritance，That this lesson we will continue in-depth，What to look at inheritance tree is big move。
You and I could talk about this polymorphic pronunciation，Your first thought should be a high school biology talked of "polypeptide"；Ok，The only possibility is to pronounce the same between the two。
We say that to achieve the extraordinary significance of inherited，It greatly reduces the number of redundant lines in our code，Reducing the difficulty of maintaining the code ......[……]
Last time we specifically about the inheritance mechanism，And also designed an inheritance tree，So the question is：I'm not going to ask Excavator strong Which? I want to ask how to determine whether a class is a subclass of another class do? How do we design a class instead of a class of attributes?
Here we will use such a method to examine the relationship between the two of them：
we say，Pistol firearms --O[……]