数据模型的构建及懒加载数据

1、数据模型的构建

#import <Foundation/Foundation.h>

@interface AppModel : NSObject

@property (nonatomic, strong) NSString *icon;
@property (nonatomic, strong) NSString *name;

- (instancetype)initWithDict:(NSDictionary *)dict;

+ (instancetype)appModelWithDict:(NSDictionary *)dict;

@end

#import "AppModel.h"

@implementation AppModel
- (instancetype)initWithDict:(NSDictionary *)dict {
  if (self = [super init]) {
    
    [self setValuesForKeysWithDictionary:dict];
  }
  
  return self;
}

+ (instancetype)appModelWithDict:(NSDictionary *)dict {
  return [[self alloc] initWithDict:dict];
}


@end

2、懒加载数据

@interface ViewController ()

@property (nonatomic, strong) NSMutableArray *dataArray;

@end

@implementation ViewController

- (NSMutableArray *)dataArray {
  if (nil == _dataArray) {
    _dataArray = [NSMutableArray array];
    
    //从plist中读取数据
    NSString *path = [[NSBundle mainBundle] pathForResource:@"app.plist" ofType:nil];
    NSArray *array = [NSArray arrayWithContentsOfFile:path];
    
    //字典转模型
    for (NSDictionary *dict in array) {
      AppModel *model = [AppModel appModelWithDict:dict];
      
      [_dataArray addObject:model];
    }
  }
  return _dataArray;
}

@end

PS:因为重写了getter方法，故调用时必须调用self.dataArray[]