fmdb- 封装的第一步解析modelClass

@interface JCF_FMDBRunTimeModelInterface : NSObject{
    Class _modelClass;
}
- (instancetype)initWithModelClassName:(NSString *)className;
/*
 * 主键的属性名
 */
@property (nonatomic,strong)NSString *mainKeyPropertyName;
@property (nonatomic,strong)NSArray *modelPropertyNameArray;
@property (nonatomic,assign)BOOL haveModelArrayProperty;
@property (nonatomic,assign)BOOL haveModelProperty;
/*
 * NSDictionary <NSString *,NSString *> 中
 * propertyModelClassName model的class string
 * propertyName 对应的属性名字
 */
@property (nonatomic,strong)NSArray <NSDictionary <NSString *,NSString *>*>* modelArrayPropertyArray;
@property (nonatomic,strong)NSArray <NSDictionary <NSString *,NSString *>*>* modelPropertyArray;

@end

@implementation JCF_FMDBRunTimeModelInterface
- (instancetype)initWithModelClassName:(NSString *)className{
    if (self = [super init]) {
        _modelClass = NSClassFromString(className);
    }
    return self;
}

- (NSString *)mainKeyPropertyName{
    if ([_modelClass respondsToSelector:@selector(mainKey)]) {//相应类方法
        return [_modelClass mainKey];
    }
    NSString *mainKey = [[[_modelClass alloc] init] mainKey];
    if (mainKey.length == 0) {
        JCF_Exception(NSStringFromClass(_modelClass),@"必须至少实现一个获取主键的方法")
    }
    return mainKey;
}

- (BOOL)haveModelProperty{
    return self.modelPropertyArray.count != 0;
}

- (BOOL)haveModelArrayProperty{
    return self.modelArrayPropertyArray.count != 0;
}

- (Class)propertyClassBy:(SEL)selector{
    // 下面这段代码抄自Mantle 方法实现的调用～
    IMP imp = [_modelClass methodForSelector:selector];
    Class (*function)(id, SEL) = (__typeof__(function))imp;
    Class class = function(_modelClass, selector);
    return class;
}

- (NSArray<NSDictionary<NSString *,NSString *> *> *)modelPropertyArray{
    if (!_modelPropertyArray) {
        NSMutableArray *modelPropertyArray = [NSMutableArray array];
        for (NSString *propertyNameString in self.modelPropertyNameArray) {
            NSString *selectorString = [NSString stringWithFormat:@"%@JCFModel",propertyNameString];
            SEL selector =  NSSelectorFromString(selectorString);
            if ([_modelClass respondsToSelector:selector]) {
                Class class = [self propertyClassBy:selector];
                NSString *className = NSStringFromClass(class);
                [modelPropertyArray addObject:@{propertyNameString:className}];
            }
        }
        _modelPropertyArray = modelPropertyArray.copy;
    }
    return _modelPropertyArray;
}
- (NSArray<NSDictionary<NSString *,NSString *> *> *)modelArrayPropertyArray{
    if (!_modelArrayPropertyArray) {
        NSMutableArray *modelArrayPropertyArray = [NSMutableArray array];
        for (NSString *propertyNameString in self.modelPropertyNameArray) {
            NSString *selectorString = [NSString stringWithFormat:@"%@JCFModelArray",propertyNameString];
            SEL selector =  NSSelectorFromString(selectorString);
            if ([_modelClass respondsToSelector:selector]) {
                Class class = [self propertyClassBy:selector];
                NSString *className = NSStringFromClass(class);
                [modelArrayPropertyArray addObject:@{propertyNameString:className}];
            }
        }
        _modelArrayPropertyArray = modelArrayPropertyArray.copy;
    }
    return _modelArrayPropertyArray;
}
- (NSArray *)modelPropertyNameArray{
    if (!_modelPropertyNameArray) {
        NSMutableArray *modelPropertyNameArray = [NSMutableArray array];
        unsigned int count;
        objc_property_t *propertys = class_copyPropertyList(_modelClass, &count);
        for (int i = 0; i<count; i++) {
            objc_property_t pro = propertys[i];
            const char *cName = property_getName(pro);
            NSString *proprttyNameString = [NSString stringWithCString:cName encoding:NSUTF8StringEncoding];
            [modelPropertyNameArray addObject:proprttyNameString];
        }
        _modelPropertyNameArray = modelPropertyNameArray.copy;
    }
    return _modelPropertyNameArray;
}

@end

//model

#import "ModelBase.h"
#import "CeShiCar.h"
#import "CeShiDog.h"

@interface CeShiPeople : ModelBase
@property (nonatomic, strong)NSString *name;
@property (nonatomic,strong)CeShiCar *car;
@property (nonatomic, strong)NSArray *dogs;

@end

@implementation CeShiPeople
+ (Class)carJCFModel{
    return [CeShiCar class];
}
+ (Class)dogsJCFModelArray{
    return [CeShiDog class];
}
@end

//USING

- (void)fmdb{
    JCF_FMDBRunTimeModelInterface *xx = [[JCF_FMDBRunTimeModelInterface alloc] initWithModelClassName:NSStringFromClass([CeShiPeople class])];
    NSArray *arr0 = xx.modelPropertyNameArray;
    NSArray *arr1 = xx.modelPropertyArray;
    NSArray *arr2 = xx.modelArrayPropertyArray;
    arr0;
}

//RESULT

Printing description of arr0:
<__NSArrayI 0x17005d880>(
name,
car,
dogs
)
Printing description of arr1:
<__NSSingleObjectArrayI 0x170008310>(
{
    car = CeShiCar;
}
)
Printing description of arr2:
<__NSSingleObjectArrayI 0x170008320>(
{
    dogs = CeShiDog;
}
)