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#import "CHViewController.h"@interface CHViewController (){    NSArray *_allDescs;}@end@implementation CHViewController- (void)viewDidLoad{    [super viewDidLoad];// Do any additional setup after loading the view, typically from a nib.    //设置图片描述    NSBundle *bundle = [NSBundle mainBundle];    NSString *path = [bundle pathForResource:@"descs" ofType:@"plist"];    _allDescs = [NSArray arrayWithContentsOfFile:path];//因为只需要加载一次就可以    NSLog(@"%@",_allDescs);    _imageDesc.text = _allDescs[0];}- (void)didReceiveMemoryWarning{    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}# pragma mark 点击设置按钮- (IBAction)nightMode:(UISwitch *)sender {    if(sender.on){        self.view.backgroundColor = [UIColor darkGrayColor];    }else{        self.view.backgroundColor = [UIColor whiteColor];    }}# pragma mark 对图像进行缩放- (IBAction)imageSizeChange:(UISlider *)sender {    //修改大小三种方式：frame bounds transform    [UIView beginAnimations:nil context:nil];    [UIView setAnimationDuration:0.4];    CGFloat scale = sender.value;    //NSLog(@"%f",scale);    _imageView.transform = CGAffineTransformMakeScale(scale, scale);    [UIView commitAnimations];}# pragma mark 控制设置view的上下- (IBAction)setting {    [UIView beginAnimations:nil context:nil];    [UIView setAnimationDuration:1.0];    CGPoint tempCenter = _settingView.center;    //NSLog(@"%@",tempCenter);    if(_settingView.frame.origin.y == self.view.frame.size.height){        tempCenter.y -= _settingView.bounds.size.height;        //NSLog(@"%@",tempCenter.x);    }else{        tempCenter.y += _settingView.bounds.size.height;    }    _settingView.center = tempCenter;    [UIView commitAnimations];}# pragma mark slide值的改变- (IBAction)sliderValueChange:(UISlider *)sender {    int location = (int)sender.value;    //设置图片    NSString *imageNamed = [NSString stringWithFormat:@"mg%d.jpg",location];    _imageView.image = [UIImage imageNamed:imageNamed];    //_imageView setImage:(UIImage *)    //设置图片序号    NSString *imageNo = [NSString stringWithFormat:@"%d/6",location];    _imageNo.text = imageNo;    //设置描述    int descNo = location - 1;    //NSLog(@"%d--%@",no,allDescs[no]);    _imageDesc.text = _allDescs[descNo];    NSLog(@"%f--%d--%@",sender.value,(int)sender.value,_allDescs[descNo]);}@end