02-常见控件：ImageView（图片视图）、slider（滑动器）、switch（开关）使用

//
//  WHBLAPViewController.h
//  04-whblap查看器
//
//  Created by whblap on 14-6-6.
//  Copyright (c) 2014年 whblap. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface WHBLAPViewController : UIViewController
@property (weak, nonatomic) IBOutlet UILabel *imageNo;  // 第几张照片
@property (weak, nonatomic) IBOutlet UIImageView *imageView; // 所要显示的照片
@property (weak, nonatomic) IBOutlet UILabel *imageDesc;  // 照片的描述
@property (weak, nonatomic) IBOutlet UIView *settingView; // 当点击设置时要显示的紫色部分的视图
- (IBAction)setButton:(id)sender;                  //  点击设置按钮触发的事件
- (IBAction)sliderValueChange:(UISlider *)sender;  // slider的值改变时 图片及图片的描述相应改变
- (IBAction)switch:(UISwitch *)sender;            // 开关 控制背景色 夜间模式
- (IBAction)imageSizeChange:(UISlider *)sender;   // slider的值的改变触发控制图片缩放
@end

//
//  WHBLAPViewController.m
//  04-whblap查看器
//
//  Created by whblap on 14-6-6.
//  Copyright (c) 2014年 whblap. All rights reserved.
//

#import "WHBLAPViewController.h"

@interface WHBLAPViewController ()
{
    NSArray *property;  //描述
}
@end

@implementation WHBLAPViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
//    通过传入文件的全路径解析plist文件来创建数组对象
//    访问项目中资源包里面的所有资源。应该用mainBundle
    NSBundle *bundle = [NSBundle mainBundle];
//     获得文件的全路径
    NSString * url = [bundle pathForResource:@"Property List" ofType:@"plist"];
    // 加载path对应的文件来创建数组
    property = [NSArray arrayWithContentsOfFile:url];
    // 2.设置默认的描述
    _imageDesc.text = property[0];
    _imageView.image = [UIImage imageNamed:@"爱人-唯一-1.jpg"];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


- (IBAction)setButton:(id)sender {
    [UIView beginAnimations:Nil context:nil];
    [UIView setAnimationDuration:1];
    
    // 1.取出中点
    CGPoint tempCenter = _settingView.center;
    
    // 设置界面目前看不见
    NSLog(@"\n %f_---------------------------------",_settingView.frame.origin.y);
    NSLog(@"\n %f_---------------------------------",self.view.bounds.size.height);
    
    // 判断要隐藏的控件的y坐标和整个View控件的高度是否相等，相等的话就显示隐藏的控件
    if (_settingView.frame.origin.y == self.view.bounds.size.height)
    {
        tempCenter.y -= _settingView.frame.size.height;
    }
    else
    {
        tempCenter.y += _settingView.frame.size.height;
    }
    _settingView.center =  tempCenter;
    
    [UIView commitAnimations];
}

#pragma mark - slider值改变
- (IBAction)sliderValueChange:(UISlider *)sender {
    // 1.设置中间的图片
    // 获得图片名称  %.f 不保留任何小数
    NSString *imageName = [NSString stringWithFormat:@"爱人-唯一-%.f.jpg",sender.value];
    // 根据图片名称设置图片
    _imageView.image = [UIImage imageNamed:imageName];
    // 2.设置序号（第几张）
    _imageNo.text = [NSString stringWithFormat:@"%.f/15",sender.value];
    // 3.设置描述
    int no = sender.value-0.5;
    _imageDesc.text = property[no];
    NSLog(@"%f",sender.value);
    
}

#pragma mark - switch 开关控制 夜间模式
- (IBAction)switch:(UISwitch *)sender {
    if(sender.on)
    {
        self.view.backgroundColor = [UIColor blackColor];
    }
    else
    {
        self.view.backgroundColor = [UIColor whiteColor];
    }
}
- (IBAction)imageSizeChange:(UISlider *)sender {
    _imageView.transform = CGAffineTransformMakeScale(sender.value*2, sender.value*2);
}
@end