偷懒啦！字典自动生成属性列表

在网络请求或加载plist文件时，常会获得一个字典。我们通常会将字典转为模型。就避免不了在类的.h文件声明属性，这是一个重复的工作，我们如何偷懒呢？

假设我们拥有一个plist文件，我们需要对其模型化。首先我们加载这个文件

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    // 获取文件全路径
    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"status.plist" ofType:nil];
    
    // 文件全路径
    NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:filePath];
    
    // 设计模型,创建属性代码 => dict
    [dict createPropertyCode];
}

其次我们声明一个NSDictionary的分类，实现方法createPropertyCode

@interface NSDictionary (Property)

- (void)createPropertyCode;

@end


@implementation NSDictionary (Property)
// isKindOfClass:判断是否是当前类或者子类
// 生成属性代码 => 根据字典中所有key
- (void)createPropertyCode
{
    NSMutableString *codes = [NSMutableString string];
    // 遍历字典
    [self enumerateKeysAndObjectsUsingBlock:^(id  _Nonnull key, id  _Nonnull value, BOOL * _Nonnull stop) {
        
        NSString *code;
        if ([value isKindOfClass:[NSString class]]) {
            code = [NSString stringWithFormat:@"@property (nonatomic, strong) NSString *%@;",key];
        } else if ([value isKindOfClass:NSClassFromString(@"__NSCFBoolean")]) {
            code = [NSString stringWithFormat:@"@property (nonatomic, assign) BOOL %@;",key];
        } else if ([value isKindOfClass:[NSNumber class]]) {
             code = [NSString stringWithFormat:@"@property (nonatomic, assign) NSInteger %@;",key];
        } else if ([value isKindOfClass:[NSArray class]]) {
             code = [NSString stringWithFormat:@"@property (nonatomic, strong) NSArray *%@;",key];
        } else if ([value isKindOfClass:[NSDictionary class]]) {
             code = [NSString stringWithFormat:@"@property (nonatomic, strong) NSDictionary *%@;",key];
        }
        // @property (nonatomic, strong) NSString *source;
        [codes appendFormat:@"\n%@\n",code];
    }];
  
    NSLog(@"%@",codes);
}

@end

当viewDidLoad执行到[dict createPropertyCode];时，就会打印出所有的属性列表：

2016-09-12 11:23:18.646 05-Runtime(****字典转模型****KVC****实现****)[11614:103900] **
@property (nonatomic, strong) NSString *source;

@property (nonatomic, assign) NSInteger reposts_count;

@property (nonatomic, strong) NSArray *pic_urls;

@property (nonatomic, strong) NSString *created_at;

@property (nonatomic, assign) BOOL isA;

@property (nonatomic, assign) NSInteger attitudes_count;

@property (nonatomic, strong) NSString *idstr;

@property (nonatomic, strong) NSString *text;

@property (nonatomic, assign) NSInteger comments_count;

@property (nonatomic, strong) NSDictionary *user;

这是在看小马哥视频时，学习到的方法，记录下来。