Objective-C

------Android Training, Java training, look forward to communicating with you! ----------1. Strong pointer: By default all pointers are strong pointers, keyword __strongWeak pointers: __week keyword-decorated pointers2.ARC: The compiler will

Original address:http://tech.glowing.com/cn/objective-c-runtime/Hara GupengIf there is infringement, please contact me to deleteObjective-cObjective-c extends the C language and joins the object-oriented and Smalltalk messaging mechanisms. The core

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.Code blocks are essentially similar to other variables. The difference is that the code block stores the data as a function body. With code

The program files are divided into header files (. h) and implementation files (. m); Use the #import keyword to import the desired header file into the program, and you can avoid the program repeatedly referencing the same header file;

First, Brief introductionUitabbarcontroller and Uinavigationcontroller Similar, Uitabbarcontroller can also easily manage multiple controllers, easy to complete the switch between the controller, the typical example is QQ, etc.Second, the use of

The role of the Protocol is similar to the multiple inheritance of abstract base classes in C + +. Similar to the concept of an Interface (interface) in Java.A protocol is a list of methods that are shared by multiple classes, and the methods listed

MostBecause in iOS app development, considering the encapsulation of some public methods, we decided to use the notation of the singleton pattern. I wonder if the singleton pattern in Object-c is different from that in Java?So Antioch from the

1. Trigonometric FunctionsDouble sin (double); sineDouble cos (double); cosineDouble tan (double); tangent2, Inverse trigonometric functionDouble asin (double); Results between [-PI/2, PI/2]Double ACOs (double); Results between [0, PI]Double Atan

#import int main (int argc, const char * argv[]){/** below is a basic type literal example */int a = 10; 10 is an integer literalfloat F = 0.5f; 0.5f is a single-precision floating-point number literalDouble d = 3.14; 3.14 is a double-precision

Dynamic bindingDynamic Typing Dynamics CheckDynamic linking dynamically linked#import int main (int argc, const char *argv[]) {@autoreleasepool {//auto-free poolNSLog (@ "Hello world!"); Want the console output string}return 0;}1 Import header file

TopicOn the topic, known A is Grandpa, B is Father, C is grandson.@interface a:nsobject-(void) F; @end @interface b:a-(void) F; -(void) g; @end @interface c:b-(void) F; @endA,b,c each implement the function F, only B implements the function

Uiviewcontroller is an important part of the iOS program that corresponds to the MVC design pattern C, which manages many views in the program, when the view is loaded, when the view is removed, the rotation of the interface, and so

Protocol protocolProtocol: Used to declare a method1. Definition of the Agreement@protocol Agreement name Method declaration List ....@end2. How to comply with the agreement1> Class Compliance Agreement@interface Class Name: Parent class name @end2>

BlockBlock is used to save a piece of codeBlock's logo: ^Blocks are like functions: You can save code, return values, physical arguments, call methods as you call them.External variables can be accessed inside the blockBy default, the outer local

———————————————————————————————————————————Use of the Super keyword#import @interface Animal:nsobject-(void) run;-(void) eat;+ (void) eat;@end@implementation Animal-(void) run{NSLog (@ "Animal run!");}-(void) Eat{NSLog (@ "-animal eat!-");}+ (void)

Dot syntaxThe essence of point syntax is method invocationScope of member variables@public : The member variables of an object can be accessed directly from anywhere@private : can only be accessed directly in the object method of the current class

directory of this document Knowledge Review One, custom construction method Second, description method Description: This objective-c topic is a prelude to learning iOS development, and to enable programmers with experience in

As alocal variable:returnType (^blockName)(parameterTypes) = ^returnType(parameters) {...};As a Property:@property (nonatomic, copy) returnType (^blockName)(parameterTypes);As amethod Parameter:-

The main operations of Nsarray immutable strings are: Create, enumerate, sort, and convert to NSStringAttention:Nsarray can save objects, cannot save basic data type, struct, array, pointer, nil, NULLNsarray with nil as the end identifier.Nsnull can

Special types of wrapper classes: arrays, structs (internal OC, custom), pointers1 //2 //main.m3 //05-nsvalue4 //5 //Created by Ma C on 15/8/17.6 //Copyright (c) 2015 BJSXT. All rights reserved.7 //8 9 #importTentypedefstruct One { A Char*name; -