Swift

Lazy LoadingFormat:Lazy var variable name: Data type = closed packet ()Note: the () must be written on the back of the closure, which represents the execution closure and assigns the return value of the closure to the variableMethod 1lazy var

Import UIKit/*:Array* format var arr:[int] = [ value 1, value 2, value 3] * non-variable group let = = Nsarray * variable array var */Let arr = [ten, one, one] // developed with this Let arr2: [Int] = [ten, one, one] Let arr3:

Yesterday, the icon in the project and the start of the transition picture is ready, so today, we can start slowly into the process of writing.Because Swift is newer, so the class library is not perfect, but do not worry, Apple has already had a

Simplicity and security are the basic ideas behind Swift's design. Less input: No semicolon required? Represents optional, the parentheses require less, the initialization of arrays and dictionaries, and switch has no break Borrowed a lot

Original articles, welcome reprint. Reprint Please specify: Dongsheng's BlogThe computed property itself does not store the data, but instead computes it from other storage properties.Calculate Attribute Concepts:The computed property provides a

# #新浪微博-Storyboard + code-Project Main framework:-Main View Controller Uitabbarcontroller-Contains four Uinavigationcontroller, which are first page messages found me-Special place, Uitabbarcontroller Middle Plus +-Configure Source Control tool SVN

Recently infatuated with Stanford's iOS public class, although English is not good, the back has not translated, I still bite the bullet to see several times, finally is finished, just want to say a word:amazing!! !OK, say the matter, now do the

1. Enumeration definition: Use the enum keyword to place their entire definition within a pair of curly bracesEnum Someeumeration{Enumeration definition goes here}2. Use of enumerations:Enum Gender{Case MaleCase Female}Let WW{Case. Male:Print ("Nan

An instance method in Swift was just a type method that takes the instance as an argument and returns a function which would Then being applied to the instance.I recently learned about a Swift feature this blew my mind a little. Instance methods is

There are two functions defined here, the second has a parameter, and there is a return value, the return value is separated by a, the first one is a normal function, no parameter return value.5 ; func test () { print ("asdfa");}Call,Int {

This is not the case in the IF statement of the SWIFT syntax:1 " Swift " 2 if let name = optionname {3 print ("OK") 4 }However, the following can occur:" Swift " if let name = optionname { print ("OK")}Let name = OptionnameWhen Optionname is

Although the swift language has now developed to the 2.0 version, but believe that many learning iOS development of children's shoes still have a wide range of Swift language questions, today's mini-series will give you a detailed introduction of

There are a lot of people who also want to use code to implement the layout of the UI, there are three steps to remove Main.storyboard:First open the project below supporting files under the Info.plistDelete the line that is referred to belowNext

1. Creation and initialization of dictionaries2. Create an empty dictionary3. Adding, modifying, and deleting data from a dictionary4. Get value based on key5. Convert value to a specific type6. Enumerate the keys and value in the dictionary7.

Swift 2.0 Study notes ( Day )--access levelOriginal articles, welcome reprint. Reprint Please specify: Dongsheng's BlogAccess level:Swift provides 3 different access levels, with the corresponding access modifiers: public, internal, and private.

Articles for their own study, the department is reproduced. Notes for learning 51cto courses. If there is infringement, please private messages I delete.The links are as follows.? http://edu.51cto.com/roadmap/view/id-58.html1 varStrvalue:string ="123

Articles for their own study, the department is reproduced. Notes for learning 51cto courses. If there is infringement, please private messages I delete.The links are as follows.? http://edu.51cto.com/roadmap/view/id-58.html1. Definition of tuple

String hash algorithmTime33 is superior in both efficiency and randomness. For a hash function, the criteria for evaluating its merits should be randomness, that is, the average degree of probability of entering each cell of a hash table for any set

Original articles, welcome reprint. Reprint Please specify: Dongsheng's BlogWhen using optional types and optional chains, the question mark (?) and exclamation point (!) are used more than once, but they have different meanings, let me explain in

Lesson two learn some of the basic types of swift and flow control statementsAfter the Xcode environment configuration is complete, the first project is created, the first one raised is a question, wheremain is, in the Swift language, main is