ios 11 2 beta 2

1. Please describe the difference between storyboard and xib?In a project, you can have multiple xib files, a xib file that corresponds to a view class controller, and multiple views. However, usingStoryboard, a project requires only one master storyboard file, so in the case of multiple attempts to control theStoryboard management is more convenient, and storyboard can also describe the navigation between interfacesRelationship.2. Please list the sin

Program Start-Life cycleFrom: qq:8537400911. first explain the UIApplication object(1) The UIApplication object is a symbol of the application, and a UIApplication object represents an application.(2) Each application has its own UIApplication object, and is a singleton, if you try to create a new UIApplication object in the program, then the error prompt.(3) This singleton object can be obtained by [Uiapplicationsharedapplication](4) An

1. Please describe the differences between storyboard and xib?In a project. can have multiple xib files, a xib file corresponding to a view class controller, and multiple views.However. UseWhen storyboard, a project needs only a master storyboard file to be able to. Therefore, in cases involving multiple attempts to control theStoryboard management is more convenient, and storyboard can also describe the navigation between the narrative interfaceRelationship.

1.1 functional components ArcGIS runtime for iOS API contains nearly 200Class and interface, covering map, Data, function display, operation, and other aspects, can also be called ArcGIS for serverProvides powerful plotting, geocoding, geographic processing and custom functions, and portal for ArcGIS. In addition, its function components cover all aspects of GIS functions, including data collection, data visualization, query and retrieval, network ana

Getting started with iOS development☞OC language · Note 2, iosoc1. attributes and instance variables) 1.1 What is an attribute defined in essence (what is the compiler doing for us ): 1) generate instance variables to save attribute values 2) generate the accessors (setter and getter methods) for modifying and accessing the attribute values 1.2 What We Know in ac

] initwithtarget:self action: @selector ( Yourhandlingcode:)];[ImageView Addgesturerecognizer:singletap];10, add multi-language support: such as image picker component, the text of the button above it changes with the device language environment, but first in the project to add language:11, enable the program to support devices such as itunes, such as the use of PC-side tools to the program documents to drag and drop files.12, the page switch effect s

IOS development-Stage 3-Weibo (2) (Weibo MVC) and iosmvc MVC design pattern Design Model: Experience, methods, and tools summarized by the predecessors Delegate, observer, Singleton Factory Model-View-Controller Design Patterns widely used in iOS development The Model processes data or business logic. View Interface between the program and the user. You can see

How do I make multiple selections in iOS?The basic idea is to set a flag bit for the data bound by the cell,To identify whether the cell is selected,If selected, modify the flag bit to Yes,and add the selected rows to the variable arrayIf the flag bit is yes when checked, it indicates that it is selectedThen you need to change the flag bit to NoAnd remove from the selected arrayImplementation process, refer to the previous single implementation articl

use of these statements:1. Rewrite the Imagesdata method so that the variable is assigned when the variable is obtained using the dot operation.-(Nsarray *) imagesdata{ if (_imagesdata = = nil) { nsstring *path = [[NSBundle mainbundle] pathforresource:@ " ImageData "oftype:@" plist "]; _imagesdata = [Nsarray Arraywithcontentsoffile:path]; } return _imagesdata;}At the same time, learning the use of the plist file, the plist file is essentially an XML file that can be i

iOS face Test 2 1, Runloop is what. A runloop is a cycle of time processing, which is used to continuously dispatch work and to process input time. The purpose of using Runloop is to keep your threads busy working while they are working, and to be dormant when they are not working. The Runloop is designed to reduce the idle CPU idling.

the base data type to null with nilvoid * : variable that can point to any data typeID Type : You can reference an object that is instantiated by any class and does not require a strong turn when sending messages to the referenced object"Self and Super keywords"Self: The object or class that accepts the message, the pointer to the current object (which is used by that object to whom Self,self is).Super: The parent class of the object that accepts the message, which is used to invoke the Member

iOS Development Swift Chapter-(eight) functions (2)First, the function typeA function type is also a type of data that consists of a formal parameter type and a return value type, in the formreturn value type (List of parameter types)1 func sum (num1:int, num2:int), Int {2 return num1 + num23}The function type of the SUM function is (int, int), int1 func prin

iOS Development Outreach-Audio processing (music player 2)Description: This article mainly introduces the construction of the music playing interface.First, jump1. Method selection to jump to the music playback interface (1) Use modal jumps (also divided into manual and Automatic) (2) Use Xib and set jump 2. Two method

save, exit completely, etc.) For the life cycle of an activity, we can see that there is a very useful monitoring of system events, We can also see the corresponding function in Unityplayeractivity.java, which means that we can receive these events in unity, and we will inherit unityplayeractivity and rewrite these listeners.2, C # C + +This is a very embarrassing problem, now 5.3.5 version does not support the use of Il2cpp under the Android platfor

Reference website: http://my.oschina.net/u/1245365/blog/196420You have already developed a certificate to skip the first step directlyFirst step: Apply for "Development certificate"Enter the Apple developer $99 Account:Selection: Certificates, Identifiers ProfilesSee "Certificates, Identifiers, Profiles" for Certificates,identifiers,profiles's introductionChoice: CertificatesSelect: Development, click "+"Can create a certificate, detailed steps please refer to the " request Certificate", here i

main function3, if a program does not have a main function, then this program does not have the ability to run4, the function is only when the call will be executed, the main function is called by the system5, the main function of the writing format must follow the specificationHow to do the main function:int main (){Statement}C Language Source program analysis#include int main () {//int represents the return value of the main functionMain is the name of the main function() represents the param

the Scenekit API scnaction to loop calculation assignment, in fact, the main thing is actionblock inside the code, you can also completely use the thread sleep and nstimer to achieve.Final results:The problem arises: we can see the limitations of the mathematical method above, the value of the y-axis has not changed, because three celestial bodies are in the x-z plane, if they are not the same Y value, not in the x-z this plane. That is, a three-dimensional point around another three-dimensiona

1, Uitextfield event with valuechanged outlet connection2. The self of struct and class in Swift3, Int and UINT4. Gesture target, action parameter, is not the target of the recognition, but the class of processing5. The reason why the UITableView is not moving is that size is not enough6, Swift uses the C array withUnsafemutablepointersThe interfaces of other C/+ + are mostly unsafexxx.7, Swift and OC interaction, Swift's agreement to inherit NSObject8. The difference between present and show Vi

corresponding city of the corresponding province Nsarray *cities = province.cities; //3. Returns the number of cities return Cities.count; } } #pragma mark-Proxy methodTell the system what each line shows-(NSString *) Pickerview: (Uipickerview *) Pickerview Titleforrow: (nsinteger) Row forcomponents: (Nsinteger) component{if (0 = = component) {Provincesreturn [Self.provinces[row] name];} else {//City0. Get the row selected in column No. 0Nsinteger Selectindex = [Pickerview selectedrowincompon

http://blog.csdn.net/pucker/article/details/41843511The previous article, "iOS 8 interface auto-layout series-1", gives a brief introduction to the way the iOS interface is laid out in the past life. This article details how to use automatic layouts to adapt to different screen sizes.There are three ways to add automatic layout constraints (hereinafter referred to as constraints): Adding and settin