learn xcode and swift

If you're an iOS developer, or you're looking to enter the industry, Swift offers you a great opportunity. Swift's design is elegant, easier to learn than obj-c, and of course very powerful.To guide developers using Swift for development, Apple has released a series of technical documents such as the Swift programming

If you're an iOS developer, or you're looking to enter the industry, Swift offers you a great opportunity. Swift's design is elegant, easier to learn than obj-c, and of course very powerful.To guide developers using Swift for development, Apple has released a series of technical documents such as the Swift programming

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In the swift language, the explanation for the Baidu Encyclopedia is: Swift: Apple's new development language, released in 2014 by WWDC (Apple Developer Conference), works with Objective-c on both Mac OS and iOS platforms to build apps based on Apple platforms. OBJECTIVE-C: Is the programming language used by the Apple operating system before it is imported into Swift.If you want to

Original articles, welcome reprint. Reprint Please specify: Dongsheng's BlogSwift 2.0 in the Print function has 4 kinds of overloaded forms: Print (_:). Output a variable or constant to the console, and wrap the line. print (_:_:). Outputs a variable or constant into a stream of the specified type, and wraps the line. print (_:appendnewline:). Output variable or constant to the console, theappendnewline parameter is a Boolean value,true indicates a newline, andfalse means no line break

To operate on Pickerview, you can only operate in code.Next, add three label components, then configure all the components into code (see Code), and then to implement the operation of Pickerview, it is necessary to implement its DataSource protocol and his agent, on the right side of the component's link bar, outlets has two options, Link them all to the controller:OK, where does our data come from?We define several arrays in the controller of the Code, and manually add the protocol, and then we

original articles, welcome reprint. Reprint Please specify: Dongsheng's blog Array ( Array ) is an ordered set of elements of the same type. The collection elements in the array are ordered and can recur. declares a Array type, you can use one of the following statements. var studentlist1:array, Array types are often initialized at the same time as they are declared. The sample code is as follows:var studentlist1:arrayArray traversalThe most common operation of an array is traversal, which is to

- While loop. The Do keyword is used for error handling. Catch, rethrows, throw, throws, and try are error-handling keywords. Error handling is the addition of new content after Swift 2.0.--writing Swift with the playground toolThe purpose of writing Swift code with playground is to learn, test algorithms, validate id

Should I learn Swift or Objective-C directly? After Apple released the Swift language at the 2014 WWDC Conference, many beginners have a common question about whether to learn C or Objective-C. In addition, it seems that people are still confused about what part of the iOS development ecology

-etxrcvqebgprfcfjyibavnioxbey/build/products/debug-iphonesimulator/mytestworkproduct.app/ Mytestworkproduct:id = {0x000d796a}, name = "Person", byte-size = +, Decl = person.h:13, Compiler_type = "@interface person:nsobject{NSString * _NAME;NSString * _adress;NSNumber * _age;Nsinteger _id;}@property (getter = Name,setter = setname:,readwrite,nonatomic) NSString * name;@property (getter = Adress,setter = setadress:,readwrite,nonatomic) NSString * adress;@property (getter = Age,setter = setage:,rea

Swift In OC, we need to use self for the code block, we can pay the self to other variables directly, and then make the empty after use in the block, or like the following weak reference self to avoid circular references:__weak typeof(self) weakSelf = self; So what do we do to this in swift? Very simple, look at the following code//这里用gcd举例不好，毕竟系统的块不会造成循环引用，这里就勉强的学一下怎么改吧dispatch_async(disp

This series of articles is translated from Apple's Xcode overview documentation, which for most developers is already familiar with the features and features of Xcode, but with the release of the iOS 8 SDK, there are some tweaks in Xcode 6, so the document is translated and organized, Thanks to translators and proofreaders who participated in this translation: St

return value of 2. Throws an exception in some specific cases such as: pass the parameter is wrong and so on, internal to the parameter to Judge 3. Thrown exceptions, which are generally defined as enumeration type enumerations followed by ErrorType this type11. OC and Swift call each otherCall OC 1.1 in 1.swift to create a bridge file (. h file) file name is typically Bridge.h 1.2 import OC header file in

Should I learn Swift or Objective-C directly ?, Swiftobjective-c After publishing the Swift language learning course, we received a lot of emails and private messages asking if we still need to learn C or Objective-C. In addition, it seems that people are still confused about what part of the iOS development ecology

= 5; int * P = A; P pointer stores an address of, directly use * P = 20; * P is equivalent to accessing the memory in the P address and changing the value to 20, that is, the value of a is 20. // Pointers are actually transmitted between addresses. The P pointer itself is the address variable, and * P directly accesses the memory pointed to by this address. // Clear the pointer with = nullvoid change (int * P) {* P = 80;} int main (INT argc, const char * argv []) {int num1 = 90; change ( num1

I recently started to learn Swift. I will expect it to be developed for Mac and iOS later. I used to learn OC halfway. The main reason is that OC and other syntaxes can be adapted. Now I have swift and JS syntaxes, scala, Python, C ++, OC and other language shadows. Start learning again! The goal is to thoroughly devel

after Apple released the swift language at the WWDC conference in 2014, many beginners had a common question of whether to study C or objective-c. Beyond that, it seems that people are still wondering which part of Swift is right for the iOS development ecosystem. Should you learn c/objective-c first or learn

parent class's stored property.Overrides a static property.A static property definition in a class uses the class or static keyword, but which is used to see if the property is overridden in a subclass.Class-Modified properties can be overridden, and the static keyword cannot be overridden. (example ignored)This is the basic note that I am learning swift to organize, hope to give more just learn iOS develo

original articles, welcome reprint. Reprint Please specify: Dongsheng's blog Swifterror handling mode, inswift1.xand theSwift 2.0are two different modes. Swift 1.xCode error handling mode usesCocoaFrame error Handling mode, up to nowobjective-cThis processing mode is also used, andSwift2.0then adopted theDo-try-catcherror handling mode. The following example code reads a string from a file into memory if yo

Swift applies to iOS and OSX, built on OC and C, without the C compatibility limit. Swift uses a secure programming model and is supported by the cocoa and cocoa touch frameworks. Swift supports playgrounds, and you can use the Code preview feature in Xcode to instantly see the results of your code running.Swift does n