第一节 NSUserDefaults（偏好设置的存取）
1.NSUserDefaults了解
2.NSUserDefaults用法
1> 存：
NSUserDefaults*userSave = [NSUserDefaultsstandardUserDefaults];
[userSave setObject:@"value"forKey:@"valueKey"];
[userSave setBool:YESforKey:@"boolKey"];
[userSave synchronize];
2>取
NSUserDefaults*userRaead = [NSUserDefaultsstandardUserDefaults];
NSString*value = [userRaead objectForKey:@"valueKey"];
BOOLisBool = [userRaead boolForKey:@"boolKey"];
第二节 plist文件存储
1> 存
//获取沙盒路径
NSString *homePath = NSHomeDirectory();
NSLog(@"%@",homePath);
NSArray *dataArray = [NSArray arrayWithObjects:@"123", @"abc",nil];
//获取存储文件Caches路径参数1directory：要搜索的文件夹 参数2domainMask：在哪个范围搜索 参数3expandTilde：是否需要展开路径
NSString *cachesPath = NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES)[0];
//拼接文件名
NSString *filePath = [cachesPath stringByAppendingPathComponent:@"app.plist"];
//写入文件 参数File：文件路径
[dataArray writeToFile:filePath atomically:YES];
2> 取
NSString *cachesPath = NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES)[0];
NSString *filePath = [cachesPath stringByAppendingPathComponent:@"app.plist"];
NSArray *dataArray = [NSArray arrayWithContentsOfFile:filePath];
第三节 归档/解档
1.归档、解档步骤
1> 创建要归档对象
2> 遵守NSCoding协议
3> 实现协议方法
4> 进行归档，解档
1> 对象.h文件
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
@interface Person : NSObject<NSCoding>
@property (nonatomic,assign) int age;
@property (nonatomic,strong) NSString *name;
//告诉系统哪些属性需要归档
-(void)encodeWithCoder:(NSCoder *)aCoder;
//告诉系统哪些属性需要解档
-(instancetype)initWithCoder:(NSCoder *)aDecoder;
@end
NS_ASSUME_NONNULL_END
2> 对象.m文件
#import "Person.h"
@implementation Person
-(void)encodeWithCoder:(NSCoder *)aCoder{
[aCoder encodeObject:_name forKey:@"name"];
[aCoder encodeInt:_age forKey:@"age"];
}
-(instancetype)initWithCoder:(NSCoder *)aDecoder{
self = [super init];
if (self) {
_age = [aDecoder decodeIntForKey:@"age"];
_name = [aDecoder decodeObjectForKey:@"name"];
}
return self;
}
@end
1> 归档
Person*p = [[Personalloc] init];
p.age= 18;
p.name= @"Jack";
//归档（任何对象都可以一般用作自定义对象）获取caches文件夹
NSString*cachesFile = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];
//拼接文件名
NSString*filePath = [cachesFile stringByAppendingString:@"peson.data"];
//参数Object：要归档的对象File文件全路径
[NSKeyedArchiverarchiveRootObject:p toFile:filePath];
2> 解档
//解档
NSString*cachesFile = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];
NSString*filePath = [cachesFile stringByAppendingString:@"peson.data"];
Person*p = [NSKeyedUnarchiverunarchiveObjectWithFile:filePath];
NSLog(@"%d %@",p.age,p.name);
