equatable protocol swift 3

A protocol defines a set of standards for methods and attributes without specific implementation. The Protocol can be implemented (or followed) by classes and struct ). protocol SomeProtocol { // protocoldefinition goes here } struct SomeStructure: FirstProtocol, AnotherProtocol {// structure definition goes here}class SomeClass: SomeSuper

1,swift protocol is similar to the interface in other languages, the Protocol only makes the declaration of methods, including the method name, return value, parameters and other information, and no specific method implementation.Protocol person { //read-write property var name:string{get set} //Read-only property var age:int{get} //Type method

has a classification of NSDate + Tools. But in the process of writing Swift 3, I discovered that if a variable is of type date, you cannot use NSDate + Tools, you must display some methods that declare date as NSDate so that you can call the classification. This allows the use of OC library when it feels very uncomfortable, after all, a lot of NS prefix removed. All the statements are too unfriendl

protocol, the implementation of the constructor needs to be identified by the colleague required and the override modifier:　　Protocol someprotocol{ Init () }class somesuperclass{ init () { //constructor implementation }}class Somesubclass: somesuperclass,someprotocol{ //Because following the agreement, you need to add required, because inheriting from the parent class, you need to add the overr

{func myFunc ()-> Int // declare not implemented only} class AnotherClass2: AnotherProtocol2 {func myFunc ()-> Int {// implementation method return 10 }} 2.1.3 mutation method requirements A method that can change the instance type within a method or function is called a mutating method) In the class, mutating can be avoided, but it must be written in China in struct and enumeration. Protocol Togg {mutating func togg ()} enum OnOffSwitch: Togg {case

Protocol :The 1.Swift protocol is used to define the specifications that multiple types should follow2. The agreement defines a specification that does not provide any implementation 3. The agreement unifies the attribute name , method, subscript , but the protocol does n

= Counter () Counter.datasource = Threesource () for_inch 1... 4{counter.increment () println (Counter.count)}//3//6//9//You can also use methods to count:classTowardszerosource:counterdatasource {func incrementforcount (count:int), Int {ifCount = =0{return 0}Else ifCount 0{return 1}Else{return-1}}}counter.count =-4Counter.datasource = Towardszerosource () for_inch 1... 5{counter.increment () println (Counter.count)}//-

The routing protocol of swift WMN is called WMN. It is a distributed network with high capacity and high speed. Different from the traditional wireless network, it can be regarded as a combination of WLAN and Ad Hoc networks, they have also taken advantage of both, as a new network structure that can solve the bottleneck problem. 1. Currently, the implemented WMN adopts the TBRPF-based routing

1. Function Introduction Using lable and a button in rootviewcontroller, click the button to jump to the modal window. There is a textfield and a button in the modal window. Enter the text and click the close modal button to jump to rootviewcontroller and change its label to the input value. 2. implementation idea: Define a member variable in modelviewcontroller. The member variable has a function that can change the label value. You can call this function in modelviewcontroller to change the

In development, it is often necessary to use the Protocol proxy mode. For example, after entering the edit page to modify the data, the new data is uploaded back to the main interface.here is a sample to illustrate the Protocol proxy mode, with the following functions:1, the main page has a label and a Modify button, click the Modify button will jump to edit page 2, edit the page to modify the text of the i

1. Brief introduction of functionRootviewcontroller with a lable and a button, click button to jump to the modal form. In the modal form, there is a textfield and a button, input text Click Close Modal button to jump to Rootviewcontroller, and change its label to enter the value. 2. Implementation ideasa member variable is defined in Modelviewcontroller, and the member variable has a function that can change the label value. By calling the function in Modelviewcontroller to change the value of

The following is the source code to be modified to error:// if Count (CurrentPassword) // var failalertview = Uialertview (Title:Localized.ACCOUNT_HINT_PASSWORD, Message:nil, Delegate:self, CancelButtonTitle:Localized.DIALOG_BUTTON_OK)// failalertview.show ()// return// }Modify the following:1 func SetPassword (currentpassword:string, newpassword:string, confirmpassword:string) {2 3 // May4 5

Update for Swift in Xcode 6.1 Beta 3(1) in Beta 3, t! was canceled. Use T? or T to indicate an empty or non-empty case. (2) if the return value of the property or initialization is not expected in the method, consider using an optional type. As in the following codevar fooopt:nsfoo? = Object.reallymightreturnnil ()!If let Foo = fooopt {...}!(