Posts about Swift
Swift function
May 21, 2021 13:00 0 Comment Swift
The function definition, The function definition, The function is called, Function arguments, Without argument functions, The u-group returns a value as a function, There is no return value function, The name of the function argument, Variable parameters, Constants, variables, and I/O parameters, A separate block of code that the Swift function is used to complete a specific task., Swift uses a uniform syntax to represent simple C-style functio
Swift array
May 21, 2021 13:00 0 Comment Swift
Swift array, Swift array, Create an array, Access the array, Modify the array, Traverse the array, Merge the array, Count property, IsEmpty property, Swift array, Swift arrays use ordered lists to store multiple values of the same type., The same value can appear more than once in different places i
Swift dictionary
May 21, 2021 13:00 0 Comment Swift
Swift dictionary, Swift dictionary, Create a dictionary, Access the dictionary, Modify the dictionary, Remove the Key-Value pair, Traverse the dictionary, The dictionary is converted to an array, Count property, IsEmpty property, Swift dictionary, Swift dictionaries are used to store a collection of out-of-order data of the same type, and the Swift array enforces detection of t
Swift Character
May 21, 2021 13:00 0 Comment Swift
Swift Character, Swift Character, The empty character variable, Traverse the characters in the string, String connection characters, Swift Character, Swift's character is a single character string literally, with a data type of Character., The following example lists two character i
Swift string
May 21, 2021 13:00 0 Comment Swift
Swift string, Swift string, Create a string, An empty string, String constant, Insert a value in the string, String connection, The length of the string, String comparison, Unicode string, String functions and operators, Swift string, A Swift string is a collection of characters. F, or example, a collection of values for an ordered character type such as "Hello, World!
Swift method
May 21, 2021 14:00 0 Comment Swift
Swift method, Swift method, The instance method, The local and external parameter names of the method, Self property, Modify the value type in the instance method, Assign a value to self in a variable method, Type method, Swift method, The Swift method is a function associated with a specific type, In Objective-C, a class is the only type that defines a method., But in
Swift unders contract script
May 21, 2021 14:00 0 Comment Swift
Swift unders contract script, Swift unders contract script, Underseed script syntax and application, Underseed script options, Swift unders contract script, Subsemic scripts can be defined in classes, structures, and enumerations as shortcuts to access objects, collections, or
Swift inherits
May 21, 2021 14:00 0 Comment Swift
Swift inherits, Swift inherits, The base class, Sub-class, Rewriting (Overriding), Override methods and properties, Override the property observer, Prevent overrides, Swift inherits, Inheritance can be understood as a class getting methods and properties of another class., When a class inherits other classes, the in
Swift constructs the process
May 21, 2021 14:00 0 Comment Swift
Swift constructs the process, Swift constructs the process, The initial assignment of the storage property, Constructor, The default property value, Construct parameters, The name of the internal and external parameters, Optional property type, The constant property is modified during construction, The default constructor, The constructor agent for the value type, The inheritance and construction process of the class, The inheritance and overload of the constructor, The failable constructor of the class, The failable constructor of the class, Overrides a failable constructor, Fail constructor init!, Swift constructs the process, The construction process is a preparation process that uses instances of a class, structure, or enumeration type. T, his
Swift destructs the process
May 21, 2021 14:00 0 Comment Swift
Swift destructs the process, Swift destructs the process, The principle of the destructing process, Swift destructs the process, The destructor is called immediately before an instance of a class is released. T, he, deinit, marked with the keyword de
Swift optional chain
May 21, 2021 14:00 0 Comment Swift
Swift optional chain, Swift optional chain, Optional chains replace forced resolution, Define model classes for optional chains, The method is called through an optional chain, Use an optional chain to call the underseed script, Access the underration through an optional link call, Access the tender of the optional type, Connect multi-layer links, Link functions that return optional values, Swift optional chain, Optional Chaining is a process that can request and call properties, methods, and sub-scripts that may target nil., The optional
Swift Automatic Reference Count (ARC)
May 21, 2021 14:00 0 Comment Swift
Swift Automatic Reference Count (ARC), Swift Automatic Reference Count (ARC), The loop between class instances is highly referenced, Loop strong references caused by closures, Weak and masterless references, Swift Automatic Reference Count (ARC), Swift uses automatic reference counting (ARC) as a mechanism to track and manage the memory of an application,
Swift type conversion
May 21, 2021 14:00 0 Comment Swift
Swift type conversion, Swift type conversion, Define a class hierarchy, Check the type, Transform down, Type conversion for Any and AnyObject, Swift type conversion, Swift language type conversion determines the type of instance., It can also be used to detect whether an instance type belongs
Swift extension
May 21, 2021 14:00 0 Comment Swift
Swift extension, Swift extension, Calculated properties, Constructor, Method, Variable instance method, The underse-label, Nested type, Swift extension, Extensions are the addition of new functionality to an existing class, structure, or enumeration type., Extensions can add new functi
Swift protocol
May 21, 2021 14:00 0 Comment Swift
Swift protocol, Swift protocol, The rule for the property, Regulations on the Mutating method, The regulation of the constructor, The protocol constructor specifies the implementation in the class, The type of protocol, Add protocol members to the extension, The inheritance of the agreement, Class-specific protocols, Protocol synthesis, Test the consistency of the protocol, Swift protocol, The protocol specifies the methods and properties necessary to implement a particular function., Any type that meets the requirements