1、NSUserDefaults
是一个单例，支持的数据类型：NSNumber(NSInteger、float、double)、NSString、NSDate、NSArray，NSDictionary，BOOL。
� (1)、NSData*imageData = [defaults dataForKey:@"image"];
UIImage *Image = [UIImage imageWithData:imageData];//NSData转换为UIImage
(2)、NSMutableArray *mutableArray = [NSMutableArray arrayWithObjects:@"123",@"234", nil];
NSArray * array = [NSArray arrayWithArray:mutableArray];
NSUserDefaults *user = [NSUserDefaults standardUserDefaults];
[user setObject:array forKey:@"array"];
NSUserDefaults *user = [NSUserDefaults standardUserDefaults];
NSMutableArray *mutableArray = [NSMutableArray arrayWithArray:[user objectForKey:@"array"]];
2、NSKeyedArchiver 存储自定义对象
-----student.h
#import<Foundation/Foundation.h>
@interface Student :NSObject<NSCoding>
@property(nonatomic,retain)NSString*name;
@property(nonatomic,retain)NSString*studentNumber;
@property(nonatomic,retain)NSString*sex;
@end
------student.m
#import "Student.h"
@implementation Student
-(void)encodeWithCoder:(NSCoder *)aCoder{
[aCoder encodeObject:self.name forKey:@"name"];
[aCoder encodeObject:self.studentNumber forKey:@"studentNumber"];
[aCoder encodeObject:self.sex forKey:@"sex"];
}
-(id)initWithCoder:(NSCoder *)aDecoder{
if (self=[super init]) {
self.name=[aDecoder decodeObjectForKey:@"name"];
self.studentNumber=[aDecoder decodeObjectForKey:@"studentNumber"];
self.sex=[aDecoder decodeObjectForKey:@"sex"];
}
return self;
}
@end
#import "ViewController.h"
#import "Student.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
Student* student=[[Student alloc]init];
student.name=@"aaa";
student.studentNumber=@"123456";
student.sex=@"女";
NSMutableArray*dataArray=[NSMutableArray array];
NSData*data=[NSKeyedArchiver archivedDataWithRootObject:student];
[dataArray addObject:data];
NSArray* array=[NSArray arrayWithArray:dataArray];
NSUserDefaults* user=[NSUserDefaults standardUserDefaults];
[user setObject:array forKey:@"allstudent"];
//取数据
NSUserDefaults *userdefaults=[NSUserDefaults standardUserDefaults];
NSArray*arr=[userdefaults objectForKey:@"allstudent"];
NSData*data1=arr[0];
Student*stu=[NSKeyedUnarchiver unarchiveObjectWithData:data1];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
3、write
4、SQLite3