效果如下所示：

实现的效果：

1.点击中间的图片，图片会方法，后面的背景颜色慢慢的变深，再一次点击图片或者图片之外的地方，图片会缩小，并且后面的背景慢慢的变浅。

2.在备选区点击文字，文字显示在答题区内，并且备选区响应的按钮会消失。

3.如果答案正确，答题区的问题会变成蓝色，自动跳转到下一题，如果答案错误，答题区的文字变成红色，在答题区点击任意一个字就会复原到相应的备选区去。

4.答题正确会增加相应的金币，点击帮助按钮，会扣除掉相应的金币。

5.备选区的答案是随机排列的。

大致就是上面的一些功能，有很多的小细节需要注意，下面是主要的code。

//
//  ViewController.m
//  超级猜图
//
//  Created by 键盘上的舞者 on 15/6/14.
//  Copyright (c) 2015年 键盘上的舞者. All rights reserved.
//

#import "ViewController.h"
#import "Question.h"

#define kButtonWidth 35
#define kButtonHeight 35
#define kButtonMargin 10
#define kTotalCol 7

@interface ViewController ()

@property (nonatomic , strong) UIButton *covert;
@property (nonatomic ,strong) NSArray *questions;
@property (nonatomic,assign) int index;

@property (weak, nonatomic) IBOutlet UILabel *noLable;
@property (weak, nonatomic) IBOutlet UILabel *descTitle;
@property (weak, nonatomic) IBOutlet UIButton *nextButton;
@property (weak, nonatomic) IBOutlet UIView *answerView;
@property (weak, nonatomic) IBOutlet UIButton *scoreButton;
@property (weak, nonatomic) IBOutlet UIView *optionView;

@end

@implementation ViewController
//载入
-(void)viewDidLoad
{
    [super viewDidLoad];
    self.index=-1;
    [self nextQuestion];
}

//调整状态栏颜色
-(UIStatusBarStyle)preferredStatusBarStyle
{
    return UIStatusBarStyleLightContent;
}
//questions的懒加载
-(NSArray *)questions
{
    if(_questions==nil){
        _questions=[Question questions];
    }
    return _questions;
}
//控件的懒加载
-(UIButton *)covert
{
    if(_covert==nil)
    {
        //设置蒙版
        _covert=[[UIButton alloc] initWithFrame:self.view.bounds];
        _covert.backgroundColor=[UIColor colorWithWhite:0.0 alpha:0.5];
        [self.view addSubview:_covert];
        _covert.alpha=0.0;
        [_covert addTarget:self action:@selector(BigAndSmallImage:) forControlEvents:UIControlEventTouchUpInside];
    }
    return _covert;
}

//放大缩小处理
- (IBAction)BigAndSmallImage:(id)sender {
    
    if(self.covert.alpha==0){//放大处理
        //设置放置图片的button放在最前面
        [self.view bringSubviewToFront:self.iconButton];
        
        //图片放大的动画
        CGFloat w=self.view.bounds.size.width;
        CGFloat h=w;
        CGFloat y=(self.view.bounds.size.height-h)*0.5;
        [UIView animateWithDuration:1.0 animations:^{
            self.iconButton.frame=CGRectMake(0, y, w, h);
            self.covert.alpha=1.0;
        }];
    }else{//缩小处理
        [UIView animateWithDuration:1.0 animations:^{
            //图片缩小
            self.iconButton.frame=CGRectMake(82, 96, 150, 150);
            self.covert.alpha=0.0;
        }];
    }
}
//下一题
-(IBAction)nextQuestion
{
    //1.题目索引递增
    self.index++;
    if(self.index==self.questions.count){
        return ;
    }
    //2.取出题目模型
    Question *question=self.questions[self.index];
    //3.设置题目基本信息（标题，图片等）
    [self setupBasicInfo:question];
    //4.设置答案按钮
    [self createAnswerButton:question];
    //5.设置备选按钮
    [self createOptionButtons:question];
    
}

-(void)setupBasicInfo:(Question *)question
{
    self.noLable.text=[NSString stringWithFormat:@"%d/%d",self.index+1,self.questions.count];
    self.descTitle.text=question.title;
    [self.iconButton setImage:[UIImage imageNamed:question.icon] forState:UIControlStateNormal];
    self.nextButton.enabled=(self.index< question.answer.length; i++) {
        CGFloat x = answerX + i * (kButtonWidth + kButtonMargin);
        
        UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(x, 0, kButtonWidth, kButtonHeight)];
        [btn setBackgroundImage:[UIImage imageNamed:@"btn_answer"] forState:UIControlStateNormal];
        [btn setBackgroundImage:[UIImage imageNamed:@"btn_answer_highlighted"] forState:UIControlStateHighlighted];
        
        [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        
        [self.answerView addSubview:btn];
        
        [btn addTarget:self action:@selector(answerClick:) forControlEvents:UIControlEventTouchUpInside];
    }
}

/**
 *  创建备选按钮
 */
- (void)createOptionButtons:(Question *)question
{
        // 如果备选区按钮数量与题目数量不相符再重新创建按钮
        if (self.optionView.subviews.count != question.options.count) {
            [self.optionView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
    
        CGFloat optionViewW = self.optionView.bounds.size.width;
        CGFloat optionX = (optionViewW - kTotalCol * kButtonWidth - (kTotalCol - 1) * kButtonMargin) * 0.5;
        for (int i = 0; i < question.options.count; i++) {
            int row = i / kTotalCol;
            int col = i % kTotalCol;
            
            CGFloat x = optionX + col * (kButtonWidth + kButtonMargin);
            CGFloat y = row * (kButtonHeight + kButtonMargin);
            
            UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(x, y, kButtonWidth, kButtonHeight)];
            [btn setBackgroundImage:[UIImage imageNamed:@"btn_option"] forState:UIControlStateNormal];
            [btn setBackgroundImage:[UIImage imageNamed:@"btn_option_highlighted"] forState:UIControlStateHighlighted];
            
            [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
            
            [self.optionView addSubview:btn];
            
            [btn addTarget:self action:@selector(optionClick:) forControlEvents:UIControlEventTouchUpInside];
        }
    }
    // 设置备选按钮文字
    [question randomOptions];
    int i = 0;
    for (UIButton *btn in self.optionView.subviews) {
        [btn setTitle:question.options[i++] forState:UIControlStateNormal];
        btn.hidden = NO;
    }
}
//答题区按钮的点击
-(void)answerClick:(UIButton *)button
{
    if(button.currentTitle.length==0){
        return ;
    }
    UIButton *btn=[self firstOptionButtonWithTitle:button.currentTitle isHiden:YES];
    btn.hidden=NO;
    [button setTitle:@"" forState:UIControlStateNormal];
    //恢复所有文字的颜色
    [self setAnswerColor:[UIColor blackColor]];
}
-(UIButton *)firstOptionButtonWithTitle:(NSString *)title isHiden:(BOOL)isHidden
{
    for (UIButton *btn in self.optionView.subviews) {
        if([btn.currentTitle isEqualToString:title]&&btn.isHidden;==isHidden){
            return btn;
        }
    }
    return nil;
}
//备选区的点击
-(void)optionClick:(UIButton *)button
{
    //在答题去找到第一次标题为空的按钮
    UIButton *btn=[self firstAnswerButton];
    if(btn==nil){
        return ;
    }
    //将btn的标题设置给答题区的按钮
    [btn setTitle:button.currentTitle forState:UIControlStateNormal];
    //将button隐藏
    button.hidden=YES;
    //判断胜负
    [self judge];
}
//找到第一个为空白的按钮
-(UIButton *)firstAnswerButton
{
    for (UIButton *btn in self.answerView.subviews) {
        if(btn.currentTitle.length==0){
            return btn;
        }
    }
    return  nil;
}
//判断胜负
-(void)judge
{
    BOOL flag=YES;
    NSMutableString *str=[NSMutableString string];
    for (UIButton *btn in self.answerView.subviews) {
        if(btn.currentTitle.length==0){
            flag=NO;
            break;
        }else{
            [str appendString:btn.currentTitle];
        }
    }
    if(flag){
        Question *question=self.questions[self.index];
        if([str isEqualToString:question.answer]){
            [self setAnswerColor:[UIColor blueColor]];
            [self changeScore:200];
            //回答正确，等待0.5s进入下一题
            [self performSelector:@selector(nextQuestion) withObject:nil afterDelay:0.5];
        }
        else{
            [self setAnswerColor:[UIColor redColor]];
        }
    }
}
//修改答题区按钮的颜色
-(void)setAnswerColor:(UIColor *)color
{
    for (UIButton *btn in self.answerView.subviews) {
        [btn setTitleColor:color forState:UIControlStateNormal];
    }
}
//提示
-(IBAction)tipClick
{
    for (UIButton *btn in self.answerView.subviews) {
        [self answerClick:btn];
    }
    //正确答案的第一个字设置到答题区中
    Question *question=self.questions[self.index];
    NSString *first=[question.answer substringToIndex:1];
    UIButton *btn=[self firstOptionButtonWithTitle:first isHiden:NO];
    [self optionClick:btn];
    [self changeScore:-100];
}
//分数处理
-(void)changeScore:(int)score
{
    int currentScore=self.scoreButton.currentTitle.intValue;
    currentScore+=score;
    [self.scoreButton setTitle:[NSString stringWithFormat:@"%d",currentScore] forState:UIControlStateNormal];
}


@end

下面是字典转模型的code：

//
//  Question.m
//  超级猜图
//
//  Created by 键盘上的舞者 on 15/6/14.
//  Copyright (c) 2015年 键盘上的舞者. All rights reserved.
//

#import "Question.h"

@implementation Question

-(instancetype)initWithDict:(NSDictionary *)dict
{
    if(self=[super init]){
        [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;
}
-(void)randomOptions
{
    self.options=[self.options sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {
        int seed=arc4random_uniform(2);
        if(seed){
            return [obj1 compare:obj2 options:0];
        }else{
            return ![obj1 compare:obj2 options:0];
        }
    }];
}
@end