IOS_反射

//
//  PJReflect.m
//  新浪微博
//
//  Created by pj on 14-8-8.
//  Copyright (c) 2014年 pj. All rights reserved.
//

#import "PJReflect.h"
#import "PJFiled.h"
#import <objc/runtime.h>
#import <Foundation/NSObjCRuntime.h>
@implementation PJReflect

+ (NSArray*)getFiled:(id)p
{
    NSMutableArray *arryFiled = [NSMutableArray array];
    Class cls = [p class];
    unsigned int ivarsCnt = 0;
    //　获取类成员变量列表，ivarsCnt为类成员数量
    Ivar *ivars = class_copyIvarList(cls, &ivarsCnt);
    //　遍历成员变量列表，其中每个变量都是Ivar类型的结构体
    for (const Ivar *p = ivars; p < ivars + ivarsCnt; ++p)
    {
        PJFiled *pFiled = [[PJFiled alloc] init];
        Ivar const ivar = *p;
        NSString *key = [NSString stringWithUTF8String:ivar_getName(ivar)];
        pFiled.argName = key;
        NSString *type = [NSString stringWithUTF8String:ivar_getTypeEncoding(ivar)];
        pFiled.type = type;
        [arryFiled addObject:pFiled];
    }
    return arryFiled;
}

+ (id)reflex:(NSDictionary *)dict object:(id)object
{
    if (![dict isKindOfClass:[NSDictionary class]]) {
        // 不是集合
        return nil;
    }
    // 1.先循环变量
    NSArray* array = [self getFiled:object];
    // 然后开始遍历
    // 先遍历dict??还是先遍历我们的对象呢??遍历对象把
    for (int i = 0; i < array.count; i++) {
        PJFiled *f = array[i];
        if (f.isBase == NO) {
            // 赋值
            if (nil == dict[f.argName]) {
                continue;
            }
            [object setValue:dict[f.argName] forKey:f.argName];
        }else
        {
            id obj = [NSClassFromString(f.type) alloc];
            if (dict[f.argName] == nil) {
                continue;
            }
            [object setValue:obj forKey:f.argName];
            [self reflex:dict[f.argName] object:obj];
        }
    }
    return object;
}
@end

//
//  PJFiled.h
//  反射1
//
//  Created by pj on 14-8-8.
//  Copyright (c) 2014年 pj. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface PJFiled : NSObject
@property (copy,nonatomic) NSString *argName; // 变量名
@property (copy,nonatomic) NSString *type; // 变量类型
@property (assign,nonatomic) BOOL isBase; // 是否是基类
@end

//
//  PJFiled.m
//  反射1
//
//  Created by pj on 14-8-8.
//  Copyright (c) 2014年 pj. All rights reserved.
//

#import "PJFiled.h"

@implementation PJFiled
- (void)setType:(NSString *)type
{
   // @"User"  // 取中间

    NSRange rang = NSMakeRange(2,[type length] - 3);
    type = [type substringWithRange:rang];
    if ([type hasPrefix:@"NS"]) {
        self.isBase = false;
    }else
    {
        if (NSClassFromString(type) != nil) {
            self.isBase = true;
        }else
        {
            self.isBase = false;
        }
    }
    _type = type;
}

- (void)setArgName:(NSString *)argName
{
    if ([argName hasPrefix:@"_"]) {
        // 删除_
        argName = [argName substringFromIndex:1];
    }
    _argName = argName;
}

@end

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