ios 利用反射机制 封装 保存自定义数据模型的工具

ios 利用反射机制 封装 保存自定义数据模型的工具

oc本身是能进行数据存储的,只是他所提供的类只能存储系统自带的数据结构,然而实际中要保存的数据远远要复杂的多,如果再用NSUserDetails来保存就太麻烦了,费事费力还不好维护.
1.建两个属性类

#import <Foundation/Foundation.h>


@interface XMDataProperties : NSObject

@property (weak, nonatomic) NSString  *name;

@property (weak, nonatomic) NSString  *type;

@property (weak, nonatomic) NSString  *value;

@end

#import "XMDataProperties.h"

@implementation XMDataProperties

@end

主体代码

#import <Foundation/Foundation.h>
#import "XMDataProperties.h"


@interface XMDataSavingTools : NSObject

+(void) save: (NSObject *) obj forKey:(NSString *) key;

+(id) load:(NSString *) key;

@end

#import "XMDataSavingTools.h"
#include <objc/runtime.h>
@implementation XMDataSavingTools



+(void) save:(id)obj forKey:(NSString *) key{
    
    NSUserDefaults *userDefault = [NSUserDefaults standardUserDefaults];
    
    NSDictionary *keyLibrart = [userDefault objectForKey:@"keyLibrart"];
    
    NSMutableDictionary *newKeyLibrart = [[NSMutableDictionary alloc] init];
    
    if (keyLibrart == nil) {
        keyLibrart = [[NSMutableDictionary alloc] init];
    }
    
    NSMutableArray *array = [[NSMutableArray alloc] init];
    
    [self save:obj forKey:key array:array];
    
    [newKeyLibrart setObject:array forKey:key];
    
    
    
    [userDefault setObject:[newKeyLibrart copy] forKey:@"keyLibrart"];
    NSLog(@"%ld",array.count);
    [userDefault synchronize];
}
+(void) save:(id)obj forKey:(NSString *) key array :(NSMutableArray *)array{
    
    NSString *str = NSStringFromClass([obj class]);
    
    NSArray *list = [self getProperties:obj];
    
    NSUserDefaults *userDefault = [NSUserDefaults standardUserDefaults];
    NSLog(@"%ld",list.count);
    for (XMDataProperties *data in list) {
        
        Class class = NSClassFromString([[data.type substringFromIndex:2] substringToIndex:data.type.length-3]);
        
        if ([[NSDate class] isEqual:class] || [[NSString class] isEqual:class] || [[NSNumber class] isEqual:class] ||[[NSArray class] isEqual:class]
             || [[NSDictionary class] isEqual:class]) {
            
            [array addObject:[NSString stringWithFormat:@"%@.%@.%@",key,str,data.name]];
            
            [userDefault setObject:data.value forKey:[NSString stringWithFormat:@"%@.%@.%@",key,str,data.name]];
            
        }else{
            
            [self save:data.value forKey:[NSString stringWithFormat:@"%@.%@.%@",key,str,data.name] array:array];
            
        }
        
    }
}


+(id) load:(NSString *) key{
    
    NSUserDefaults *userDefault = [NSUserDefaults standardUserDefaults];
    
    NSMutableDictionary *keyLibrart = [userDefault objectForKey:@"keyLibrart"];
    
    NSMutableArray *array = [keyLibrart objectForKey:key];
    
    NSMutableDictionary *dic = [[NSMutableDictionary alloc] init];
    id class = nil;
    NSLog(@"%ld",array.count);
    for (NSString *attr in array) {
        
        NSArray *attrSp = [attr componentsSeparatedByString:@"."];

        class = [NSClassFromString(attrSp[1]) alloc];
        NSLog(@"%@",attr);
 
    }
    
 
    
    
    [self load:key assignment:class array:array index:0];
    
    if (class == nil) {
        
        return nil;
        
    }else{
        
        return class;
        
    }
    
}

+(void) load:(NSString *) key assignment:(id) obj array:(NSMutableArray *) array index:(int) index{
    
    index++;
    
    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
    unsigned int count;// 记录属性个数
    Ivar *ivars = class_copyIvarList([obj class], &count);
    
    for (int i = 0 ; i < count; i++) {
        
        if (i >= array.count) {
            continue;
        }
        
        NSArray *attrSp = [array[i] componentsSeparatedByString:@"."];
        
        Ivar ivar = ivars[i];
        
        if (attrSp.count >= (index+2)) {
            
            object_setIvar(obj, ivar, [userDefaults objectForKey:array[i]]);
            NSLog(@"%@",[userDefaults objectForKey:array[i]]);
        }else if (attrSp.count >= (index+3)){
            
            const char *memberType = ivar_getTypeEncoding(ivar);
            
            NSString *type = [NSString stringWithFormat:@"%s",memberType];
            
            Class class = NSClassFromString([[type substringFromIndex:2] substringToIndex:type.length-3]);
            
            object_setIvar(obj, ivar, class);
            
            [self load:key assignment:class array:array index:index];
            
        }
    }
}

//返回当前类的所有属性
+ (NSArray *)getProperties:(id)obj{
    Class cls = [obj class];
    
    // 获取当前类的所有属性
    unsigned int count;// 记录属性个数
    
    // 遍历
    Ivar *ivars = class_copyIvarList(cls, &count);
    NSMutableArray *map = [[NSMutableArray alloc] init];

    for (int i = 0 ; i < count; i++) {
        Ivar ivar = ivars[i];
        
        const char *memberName = ivar_getName(ivar);
        
        const char *memberType = ivar_getTypeEncoding(ivar);

        id memberValue = object_getIvar(obj, ivar);
        
        XMDataProperties *data = [[XMDataProperties alloc] init];
        
        data.name = [NSString stringWithFormat:@"%s",memberName];
        
        data.type = [NSString stringWithFormat:@"%s",memberType];
        
        data.value = memberValue;
        
        [map addObject:data];
        
    }

    return map.copy;
}


@end