IOS第四天(2:字典转模型plist)

HMQuestion.h

#import <Foundation/Foundation.h>
@interface HMQuestion : NSObject
@property (nonatomic, copy) NSString *answer;
@property (nonatomic, copy) NSString *icon;
@property (nonatomic, copy) NSString *title;
@property (nonatomic, strong) NSArray *options;

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

/** 返回所有题目数组 */
+ (NSArray *)questions;
@end

HMQuestion.m

#import "HMQuestion.h"

@implementation HMQuestion

// 在成员方法中，如果给self赋值，只能在initXXX方法中进行
// 语法约定：
// 1> 所有的方法首字母小写
// 2> 当单词切换的时候，单词首字母大写（驼峰法）
// 3> 类名要大写
- (instancetype)initWithDict:(NSDictionary *)dict
{
    self = [super init];
    if (self) {
        [self setValuesForKeysWithDictionary:dict];
    }
    return self;
}

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

+ (NSArray *)questions
{
    NSArray *array = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"questions.plist" ofType:nil]];

    NSMutableArray *arrayM = [NSMutableArray array];
    for (NSDictionary *dict in array) {
        [arrayM addObject:[self questionWithDict:dict]];
    }

    return arrayM;
}

// 对象描述方法，类似于java中的toString()，便于跟踪调试的
// 建议：如果是自定义的模型，最好编写description方法，可以方便调试
- (NSString *)description
{
    return [NSString stringWithFormat:@"<%@: %p> {answer: %@, icon: %@, title: %@, options: %@}", self.class, self, self.answer, self.icon, self.title, self.options];
}

@end

HMViewController.m文件

#import "HMViewController.h"
#import "HMQuestion.h"

@interface HMViewController ()
@property (nonatomic, strong) NSArray *questions;
@end

@implementation HMViewController
//懒加载
- (NSArray *)questions
{
    if (_questions == nil) {
        _questions = [HMQuestion questions];
    }
    return _questions;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    NSLog(@"%@", self.questions);
//    for (HMQuestion *obj in self.questions) {
//        NSLog(@"%@", obj);
//    }
}

/** 调整状态栏颜色 */
/**
 UIStatusBarStyleDefault      黑色状态栏
 UIStatusBarStyleLightContent 亮色状态栏
 */
- (UIStatusBarStyle)preferredStatusBarStyle
{
    return UIStatusBarStyleLightContent;
}

@end