之前一直用NSUserDefaults在登录的时候来保存用户名和密码，现在换成另外一种方式，记录一下，以免以后用到能够直接command+v
第一种方法--NSUserDefaults
创建一个继承NSObject的类，在.h里面添加方法
+(void)saveUserName:(NSString *)userName;//保存用户名
+(NSString *)getUserName;//获取用户名
+(void)savePassWD:(NSString *)passWD;//保存用户密码
+(NSString *)passWD;//获取用户密码
在.m里面实现方法
//储存用户名
+(void)saveUserName:(NSString *)userName
{
NSUserDefaults *name = [NSUserDefaults standardUserDefaults];
[name setObject:userName forKey:@"userName"];
}
+(NSString *)getUserName
{
NSUserDefaults *name = [NSUserDefaults standardUserDefaults];
NSString *str = [name objectForKey:@"userName"];
return str;
}
//储存用户密码
+(void)savePassWD:(NSString *)passWD
{
NSUserDefaults *passWord = [NSUserDefaults standardUserDefaults];
[passWord setObject:passWD forKey:@"passWord"];
}
+(NSString *)passWD
{
NSUserDefaults *passWord = [NSUserDefaults standardUserDefaults];
NSString *str = [passWord objectForKey:@"passWord"];
return str;
}
第二种方法--Keychain
创建一个继承NSObject的类，在.h里面添加方法
导入头文件 #import <Security/Security.h>
+(void)addKeychainData:(id)data forKey:(NSString *)key;//保存
+(id)getKeychainDataForKey:(NSString *)key;//获取
+(void)deleteKeychainDataForKey:(NSString *)key;//删除
在.m里面实现方法
+ (NSMutableDictionary *)getKeychainQuery:(NSString *)service {
return [NSMutableDictionary dictionaryWithObjectsAndKeys:
(__bridge id)kSecClassGenericPassword,(id)kSecClass,// 标识符(kSecAttrGeneric通常值位密码)
service, (__bridge id)kSecAttrService,// 服务(kSecAttrService)
service, (__bridge id)kSecAttrAccount,// 账户(kSecAttrAccount)
(__bridge id)kSecAttrAccessibleAfterFirstUnlock,(__bridge id)kSecAttrAccessible,// kSecAttrAccessiblein变量用来指定这个应用何时需要访问这个数据
nil];
}
/**
储存用户账号
*/
+(void)addKeychainData:(id)data forKey:(NSString *)key
{
// 获取查询字典
NSMutableDictionary *keychainQuery = [self getKeychainQuery:key];
// 在删除之前先删除旧数据
SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
// 添加新的数据到字典
[keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(__bridge id)kSecValueData];
// 将数据字典添加到钥匙串
SecItemAdd((__bridge CFDictionaryRef)keychainQuery, NULL);
}
+(id)getKeychainDataForKey:(NSString *)key
{
id ret = nil;
NSMutableDictionary *keychainQuery = [self getKeychainQuery:key];
[keychainQuery setObject:(id)kCFBooleanTrue forKey:(__bridge id)kSecReturnData];
[keychainQuery setObject:(__bridge id)kSecMatchLimitOne forKey:(__bridge id)kSecMatchLimit];
CFDataRef keyData = NULL;
if (SecItemCopyMatching((__bridge CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyData) == noErr) {
@try {
ret = [NSKeyedUnarchiver unarchiveObjectWithData:(__bridge NSData *)keyData];
} @catch (NSException *e) {
NSLog(@"Unarchive of %@ failed: %@",key,e);
} @finally {
}
}
if (keyData) {
CFRelease(keyData);
}
return ret;
}
+(void)deleteKeychainDataForKey:(NSString *)key
{
NSMutableDictionary *keychainQuery = [self getKeychainQuery:key];
SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
}
以后开发中用到的小tool，都会依次更新到简书上，，欢迎大家给出更好的意见！
