项目结构

视图分析

加载plist数据

将数据的初始化放在了数据模型里

JKQuestionInfo

+ (NSArray *)questions{

NSString *path = [[NSBundle mainBundle]pathForResource:@"questions" ofType:@"plist"];

NSArray *array = [NSArray arrayWithContentsOfFile:path];

NSMutableArray *arrayM = [NSMutableArray arrayWithCapacity:array.count];

for (NSDictionary *dict in array) {

    [arrayM addObject:[self questionWithDict:dict]];
}
return [arrayM copy];
}

ViewController

- (NSArray *)questions {
if (nil == _questions) {
    _questions = [JKQuestionInfo questions];
}
return _questions;
}

ViewController

定义常量

//需要计算的话，用宏,否则用const,如下

//图片按钮的宽度
#define imgW self.imgInsideBtn.bounds.size.width

//答案按钮宽
CGFloat const kBtnW = 35;

UIButton 配置

//为按钮设置背景图片
[self.imgInsideBtn setImage:question.image forState:UIControlStateNormal];

//设定按钮高亮下的背景图片
[btn setBackgroundImage:[UIImage imageNamed:@"btn_answer_highlighted"] forState:UIControlStateHighlighted];

//设定按钮常规下的字体颜色
[btn setTitleColor:kAnswerBtnTitleColor forState:UIControlStateNormal];

//设定按钮的点击方法
[btn addTarget:self action:@selector(answerBtnOnClick:) forControlEvents:UIControlEventTouchUpInside];

//设定按钮上的字符
[answerBtn setTitle:nil forState:UIControlStateNormal];

//alpha值切换按钮的不同状态
self.cover.alpha = 0.0;

遍历移除所有子视图

for (UIButton *btn in self.answerView.subviews) {
    [btn removeFromSuperview];
}

UIView 配置

//该按钮不隐藏
optionBtn.hidden = NO;

//该view是否具有互动性
self.optionsView.userInteractionEnabled = YES;

//将中间图片按钮设置成是离屏幕最近一层,所有子视图的最上面
[self.view bringSubviewToFront:self.imgInsideBtn];