2021-05-18 1.更新

JLChen

2021-05-18 a869383e163a18cdedcf587383c1eca043129754

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//
//  MJFoundation.m
//  MJExtensionExample
//
//  Created by MJ Lee on 14/7/16.
//  Copyright (c) 2014年 小码哥. All rights reserved.
//
 
#import "MJFoundation.h"
#import "MJExtensionConst.h"
#import <CoreData/CoreData.h>
#import "objc/runtime.h"
 
@implementation MJFoundation
 
+ (BOOL)isClassFromFoundation:(Class)c
{
    if (c == [NSObject class] || c == [NSManagedObject class]) return YES;
    
    static NSSet *foundationClasses;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        // 集合中没有NSObject，因为几乎所有的类都是继承自NSObject，具体是不是NSObject需要特殊判断
        foundationClasses = [NSSet setWithObjects:
                             [NSURL class],
                             [NSDate class],
                             [NSValue class],
                             [NSData class],
                             [NSError class],
                             [NSArray class],
                             [NSDictionary class],
                             [NSString class],
                             [NSAttributedString class], nil];
    });
    
    __block BOOL result = NO;
    [foundationClasses enumerateObjectsUsingBlock:^(Class foundationClass, BOOL *stop) {
        if ([c isSubclassOfClass:foundationClass]) {
            result = YES;
            *stop = YES;
        }
    }];
    return result;
}
 
+ (BOOL)isFromNSObjectProtocolProperty:(NSString *)propertyName
{
    if (!propertyName) return NO;
    
    static NSSet<NSString *> *objectProtocolPropertyNames;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        unsigned int count = 0;
        objc_property_t *propertyList = protocol_copyPropertyList(@protocol(NSObject), &count);
        NSMutableSet *propertyNames = [NSMutableSet setWithCapacity:count];
        for (int i = 0; i < count; i++) {
            objc_property_t property = propertyList[i];
            NSString *propertyName = [NSString stringWithCString:property_getName(property) encoding:NSUTF8StringEncoding];
            if (propertyName) {
                [propertyNames addObject:propertyName];
            }
        }
        objectProtocolPropertyNames = [propertyNames copy];
        free(propertyList);
    });
    
    return [objectProtocolPropertyNames containsObject:propertyName];
}
 
@end