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Today the teacher took us to realize a simple calculator, benefited greatly.Just like every project, no matter the size, I first think of the teacher said that sentence, you have to put a good outline in the brain, think well step by step what to do, if the feeling is not clear enough to write down the notebook first.1. Add button, color, font size 472. Add label, font size 80, color3. Associate Input Button 4.label Global, take out the number above the button, NSString *numberstring=[sender

, methodical, the teacher on the 0 basis of the students very patient. Many of the concepts are explained by examples of its principles and operating procedures, in a number of examples to learn the judgment, cycle, and learn an important concept: "method." During this period, the teacher made a "simple version of the calculator", "Coloring nine Gongge" and so on.The teacher's lecture style is obvious, does not speak the boring theory. is to concatenate important and fragmented knowledge in smal

:@ "Tmp/rongtian.txt"];if (![ MyString writetofile:path atomically:yes encoding:nsutf8stringencoding Error:error]) {NSLog (@ "Write file error%@", error);return;}2.NSString RangeNsrange R;r.location = 4;r.length = 5;nsstring *strsub = [str substringwithrange:r];NSLog (@ "Range%@", strsub);3. Searchnsrange searchrange = [str rangeofstring:@ "Five"];if (searchrange.location! = nsnotfound) {NSLog (@ "Search location%d%d", searchrange.location,searchrange.length);}4. Replacensstring *replaced = [str

Today we enter to do the example link, Liu Guobin teacher took us to do two small games, two games seemingly simple but included in the knowledge covers almost all the things learned before, so comprehensive very strong, and exercise personal logical thinking ability.In the brick practice, to add a rectangle to the interface, the two control bricks move the button around, then create a ball on top of the brick so that the ball starts to move at the beginning of the interface, then collide to the

: nsobject{} However, it is important to note that the attribute encapsulates the instance variable, encapsulates the concrete implementation code, and encapsulates the properties and methods of the class. Subclasses can inherit methods from the parent class, and can override the parent class method.Ii. inheritanceOne of the main functions of object-oriented programming (OOP) language is "inheritance". Inheritance refers to the ability to use all the functionality of an existing class and to ext

Skynet is a server framework based on the actor model implemented by the cloud wind, with core 7,000 + lines of C code and a LUA binding. Write more concise, use more readily, very close to my appetite, combined with the decision in the company's recent project on the Skynet, so decided to read through the source code, will think of the results recorded in this, so that the use of conscience.The implementation of Skynet is based on several actor behaviors: Can create and destroy other a

used to indicate whether the conversion succeeded. The TryParse method is similar to the parse method, except that the TryParse method does not throw an exception if the conversion fails.bool a=enum.tryparse"Brown"false out C); // false, Brown is not defined in the enumerationIsdefine: Public Static BOOL object value);Determines whether a value is valid for an enumeration type.enum.isdefined (typeof"white"); // false to perform a case-sensitive check enum.isdefined (typeof5); // false, the colo

related project developmentFor the rapid response to this piece, we can not blindly rely on manufacturers, and hope that they can quickly respond, timely solve the problem. This is also a long-term problem, and the need to strengthen the input of research and development forces.I personally do development background, have such experience, at the time is at the customer site, because understanding the internal structure of the system, can be in the first time to troubleshoot customer feedback pr

1. OverviewThis chapter contains enumeration types, bit flags, and methods for enumeration types.2. Main content　　2.1 Enum typesAn enumeration type defines a set of "symbol name/value" pairs.The benefits of enumeration types include: ① can make programs easier to write, read, and maintain. The ② enumeration type is strongly typed and has compiler detection.When compiling enumeration types, the C # compiler converts each symbol into a constant field of type.The System.Enum type has a static metho

method of AA.M with protocol is written in the paper.-(void) Playwithobject: ( ID Delegate >) anyobject{ [anyobjectplay]; }③When introducing the AA Bb class in the Viewcontroller.Create objects individually. AA class object, invoking an instance method to pass the BB class object into the Times warning: The BB class object must be compliant with the protocol of the instance method in the AA class.Need to Bb.hin the Bb class:The class in which the Protocol is introduced#import "Aa.h"Let the BB

" Otherbuttontitles:Nil, Nil];[Alter show];}break;default:break;}}Drag and drop to create1 Create and set propertiesdragging Uisegmentedcontrol to the Main.storyboard page, select it to set its properties in Control Panel2. Associated Eventsselected Uisegmentedcontrol hold Control button to drag under @implementation viewcontroller3. Add an eventAdd a click effect within parentheses-(ibaction) Scvaluechange: ( Uisegmentedcontrol *) sender{{ int currentindex = sender. Selectedsegmentind

Today we mainly learned about forward calls and reverse invocations, where reverse calls are more difficult to understand.The process of reversing a value (reverse invocation):1, declare a weak property of type A in class B, the variable is called delegate2, when Class A creates class B, assigns the delegate attribute of Class B to self3, in Class B already has the Class A object, you can directly access the Class A. h in the various properties and methods.Then the teacher asked us to try to use

Yesterday was September 7. Was clear, sullenness, is a good day to travel. But I don't have time to go out. Can only continue in the classroom to learn to live a life without a vacation. To tell the truth, it feels like living in a school and dorm. This 2.1-line small space is really a different kind of dwelling life. I just hope that what I have done today will reap the rewards of tomorrow. Let the future days can not be mediocre.Finally recorded the harvest of yesterday. I made two little thin

Day10Lectures ten days, today mainly about the iOS calculator program writing, which contains the new code is quite a lot of, and need to seriously think, organizational logic of the place also many. Summarize some of the code that needs to be understood and applied.Control the number of digits in the decimal pointSelf.resultLabel.text = [nsstringstringwithformat:@ "%.2f", result];Take the numbers out and let the labels show.Remove the title of the buttonNSString *title = [Sender titleforstate:u

20145326 Cai-yi Experiment Three "agile Development and XP Practice" program design process experiment contentUploading code using GITUse Git to change code with each otherImplementing overloading of CodeOne, git upload codeFirst I upload a code called "Shiyansan" via Git.Set permissions:Then my partner downloaded the document to his computer from the Internet.Then modify, and then upload:My partner:-[20145211 Huang Zhiyuan Open Source managed code] (

A picture1 Background imageBecause it is two identical images constantly repeating starting with an instant load with for (int i=0,iLan Yi-flying pictures, memory management Basics Liu Guobin Teacher

1, the protocol uses the situation: A class has an instance method, this instance method to the object passed over, restricts it must implement a specific method, and the passed object type is not limited.2. FormatProtocol name: @protocol protocol Name Protocol name general: class name +delegate.Protocol content: A specific methodSpecific examples:①The instance method in the AA class has a protocol limit.The BB class is a generic class.IiIn Aa.h :Protocol wording@protocol aadelegate NSObject >

There are also the parts of the post written questions:1, which manufacturing steps in the CMOS used ion implantation, need to pay attention to what?2. What are the thin film preparation methods? What are the pros and cons?3, COMs of the production steps, a brief description.4, the carrier's transport mode has what, a brief description.5, the types of defects in semiconductors, the type of impurities, the harm of defective impurities, how to avoid impurities defects.6. Why do solids have superco

Yi Meng tcp file upload download and Automatic Update system introduction (TCP File Transfer)The system is based on the open source Networkcomms communication framework, which was previously charged, is now free and Kaiyuan, the author is the United Kingdom, the development time of more than 5 years, the framework is very stable.Project Address: https://item.taobao.com/item.htm?spm=686.1000925.0.0.AjdBGPid=537538462790Consulting qq:286275658Demo Progr

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