Implementation of MD5/SHA1 encryption algorithm for IOS Objective-c

OBJECTIVE-C implementation of MD5 and SHA1 algorithm is relatively simple, you can directly call the system's C/s + + shared library to implement the callMD5 is the message Digest algorithm 5 (Information-Digest algorithm 5), which is used to ensure

The use of BASE64 encoded encryption and decryption in IOS objective-c

BASE64 uses commonly used URL ciphertext encoding to pass longer identity information in an HTTP environment. The adoption of BASE64 encoding is not only shorter but also unreadable. The following address is the encrypted Thunderbolt dedicated downl

Implementation of Objective-c string MD5, SHA1, SHA256, AES encryption

Problem: When I do user login, the background API needs to MD5 the encryption of the number and request time of the merged strings, so on the GitHub to find an encrypted frame, link: https://github. (ox) Com/paulery2014/cocoasecurity, I wrote a smal

Objective-c dictionary use of detailed __objective-c

#import <UIKit/UIKit.h> #import "AppDelegate.h" int main (int argc, char * argv[]) { //similar to the map in Java, That is, the key value pair; nsdictionary *dict = @{@ "name": @ "Zhangsan", @ "age": @23}; Print out the whole dicti

Objective-c Array Detailed __oc

(1) Create an array and output it. To create an array directly using Nsarray, [arr count] calls the method to compute the length of the array. [Arr objectatindex:i] is an object that invokes a method to get a index position. #import <UIKit/UIKit.

OBJECTIVE-C Foundation Framework Practice--nsstring (ii) __objective-c

For NSString, there are many practical methods, such as: case conversion, prefix matching, string concatenation, formatting strings, and so on. Let's take a look at the following: #import <Foundation/Foundation.h> int main (int argc, const cha

Objective-c type inference __oc

#import <UIKit/UIKit.h> #import "AppDelegate.h" #import "Man.h" @interface a:nsobject @end @implementation A @end @interface aa:a @end @implementation AA @end int main (int argc , char * argv[]) { A *a = [[A alloc] init];

OBJECTIVE-C Foundation Framework Practice--nsdictionary (i) __foundation

A dictionary is a special type of OC, and its function is very powerful. is an important part of foundation. Let's Learn: #import <Foundation/Foundation.h> int main (int argc, const char * argv[]) {@autoreleasepool {//INSERT Co De here .../* D

[objective-c] Transitions from reference count to Automatic reference count (ARC)

Turn from: https://developer.apple.com/library/mac/releasenotes/ObjectiveC/RN-TransitioningToARC/Introduction/Introduction.html transitioning to ARC release Notes Automatic Reference Counting (ARC) is a compiler feature this provides Automatic memo

Objective-c Lightweight Generic __ Type

When Apple released Xcode7, it not only upgraded the SWIFT programming language to version 2.0, but also made a number of upgrades to objective-c, including the introduction of __nonnull/__nullable. Among them, for the OBJECTIVE-C programming languag

Objective-c list in reverse __interface

@interface Nsarray (Reverse) -(Nsarray *) Reversedarray; @end @interface Nsmutablearray (Reverse) -(void) reverse; @end @implementation Nsarray (Reverse) -(Nsarray *) Reversedarray { Nsmutablearray *array = [Nsmutablearray arraywithcapacity

What does the _cmd in objective-c mean? __cmd

The Objective-c compiler adds two hidden parameters to each method after compilation:One is _cmd, a sel pointer to the current method.The other is the more self, which points to a pointer to the current object.

Objective-c Common design pattern (i)--Factory mode mode __ Factory model

Factory method Mode:Defines the interface that creates an object, letting subclasses decide which class to instantiate. The factory method delays the instantiation of a class to its subclasses. Almost all applications written in object-oriented langu

[Objective-c] Strong/weak Property--the metaphor of a dog collar

Turn from: Http://stackoverflow.com/questions/8927727/objective-c-arc-strong-vs-retain-and-weak-vs-assign Http://rdcworld-iphone.blogspot.in/2012/12/variable-property-attributes-or.html BJ Homer to Strong/weak reference gave a very image of the meta

OBJECTIVE-C Program Run Sequence _ program run order

Procedure to run: 1, after the program started, find the main function--------program entrance A Application object was created in the main function, and a delegate proxy was created for the object. 2, jump to application of the. m file, * Create a

The 11th chapter of "Objective-c Basic Course" Property __objective-c

11.1 Using attribute values (@property) 11.1.2 simplifies implementation code @synthesize is a new compiler feature that represents the access code that created the property. When @synthesize rainhandling is encountered, the compiler speaks of addi

Objective-c programming language (12) Thread _ Multithreading

Reprint please indicate the source: http://blog.csdn.net/zhangxingping Threads In addition to providing exception handling mechanisms, OBJECTIVE-C provides thread synchronization capabilities. Exception handling is described in the previous "Excep

Implementation of SHA1/HMACSHA1 encryption algorithm for OBJECTIVE-C and Java

Tags: exce encryption mode NTA dex AC params = = SDA + +Reprint: https://www.cnblogs.com/qqsscc/p/4265451.htmlRecently researched the ability to sign in on an iOS phone. The SHA1 algorithm is used because of encryption. The net also did not find the

"Effective OBJECTIVE-C 2.0" after reading summary of the Five

Tags: global help for loop fail-over CTI Pos get between themselvesWritten in the previous words:1, from now, this moment, began to work hard, move up!2, "Effective OBJECTIVE-C 2.0" This is a very real book, each chapter with specific examples to

"Effective OBJECTIVE-C 2.0" after reading summary of four

Tags: exec IAP decision security monitoring PST Group STAT thread SafetyWritten in the previous words:1, from now, this moment, began to work hard, move up!2, "Effective OBJECTIVE-C 2.0" This is a very real book, each chapter with specific examples

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