实现本地存取自定义对象

一.定义对象：自定义对象必须遵从nscoding协议

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@interface TestDic : NSObject

@property (nonatomic,copy) NSString *pro1;

@property (nonatomic,copy) NSString *pro2;

@implementation TestDic

-(instancetype)initWithCoder:(NSCoder *)aDecoder{

if (self=[super init]) {

self.pro1=[aDecoder decodeObjectForKey:@"pro1"];

self.pro2=[aDecoder decodeObjectForKey:@"pro2"];

}

return self;

}

-(void)encodeWithCoder:(NSCoder *)aCoder{

[aCoder encodeObject:self.pro1 forKey:@"pro1"];

[aCoder encodeObject:self.pro2 forKey:@"pro2"];

}

@end

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二。使用NSKeyedArchived类和NSKeyedUnarchiver类实现存取

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// 写文件

NSString *path=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];

//    NSString *str=@"测试";

NSString *docpath=[path stringByAppendingPathComponent:@"test.data"];

NSDictionary *dic1=[NSDictionary dictionaryWithObjectsAndKeys:@"1",@"pro1",@"2",@"pro2", nil];

NSDictionary *dic2=[NSDictionary dictionaryWithObjectsAndKeys:@"3",@"pro1",@"4",@"pro2", nil];

TestDic *test1=[[TestDic alloc]init];

TestDic *test2=[[TestDic alloc]init];

test1.pro1=[dic1 valueForKey:@"pro1"];

test2.pro1=[dic2 valueForKey:@"pro1"];

test1.pro2=[dic1 valueForKey:@"pro2"];

test2.pro2=[dic2 valueForKey:@"pro2"];

NSMutableArray *arr=[NSMutableArray array];

[arr addObject:test1];

[arr addObject:test2];

//    NSData *imageData = [NSKeyedArchiver archivedDataWithRootObject:arr];

//NSArray *arr=[NSArray arrayWithObjects:@"1",@"2", nil];

BOOL iswrite= [NSKeyedArchiver archiveRootObject:arr toFile:docpath];

if (iswrite) {

NSLog(@"写入成功");

}else{

NSLog(@"写入失败");

}

NSLog(@"%@",docpath);

//读文件

NSMutableArray *mutablearr=[NSKeyedUnarchiver unarchiveObjectWithFile:docpath];

NSLog(@"%@",mutablearr);