IOS development USES KeychainItemWrapper to persist user names and passwords

First download from the official website

KeychainItemWrapper.h
KeychainItemWrapper.m

Import these two files into the project. However, this file is released manually, so you need to do some processing to use this file:

If you want to use the KeychainItemWrapper.h class, select this class in CompileSources and add -fno-objc-arc

Next, directly enter the code:

KeychainItemWrapper *keychain=[[KeychainItemWrapper alloc] initWithIdentifier:@"myKey" accessGroup:nil];//myKey  The custom 
  // Save the data   save 1 Even if the program is deleted   The phone still keeps its key string   Still can be keychain To obtain 
//  [keychain setObject:@"little Pig" forKey:(id)kSecAttrAccount];// Account name 
//  
//  [keychain setObject:@"123456" forKey:(id)kSecValueData];// The account password 
  // from keychain Take out the account password 
  NSString *password = [keychain objectForKey:(id)kSecValueData];
  NSLog(@"%@", password);
  // Empty set 
//  [keychain resetKeychainItem];

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