//  ViewController.m//  08-模仿UIImageView#import "ViewController.h"#import "XMGImageView.h"@interface ViewController ()@property (nonatomic, strong) XMGImageView *imageV;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.    //    UIImageView *imageV = [[UIImageView alloc] initWithFrame:CGRectMake(50, 50, 200, 350)];        // 默认控件的尺寸跟图片一样//    UIImageView *imageV = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"汽水"]];//    imageV.image = [UIImage imageNamed:@"汽水"];        //    _imageV = imageV;            // 默认图片把控件填充，图片的尺寸跟控件尺寸一样大//    [self.view addSubview:imageV];    //    XMGImageView *imageView = [[XMGImageView alloc] initWithFrame:CGRectMake(50, 50, 200, 350)];//    _imageV = imageView;   XMGImageView *imageView = [[XMGImageView alloc] initWithImage:[UIImage imageNamed:@"汽水"]];//    imageView.image = [UIImage imageNamed:@"汽水"];//        [self.view addSubview:imageView];    }- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{    _imageV.image = [UIImage imageNamed:@"CTO"];}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end

//  XMGImageView.h//  08-模仿UIImageView#import <UIKit/UIKit.h>@interface XMGImageView : UIView@property (nonatomic, strong) UIImage *image;- (instancetype)initWithImage:(UIImage *)image;@end

//  XMGImageView.m//  08-模仿UIImageView#import "XMGImageView.h"@implementation XMGImageView- (instancetype)initWithImage:(UIImage *)image{    // 默认跟图片尺寸一样大    if (self = [super initWithFrame:CGRectMake(0, 0, image.size.width, image.size.height)]) {                _image = image;    }        return self;}- (void)setImage:(UIImage *)image{    _image = image;        [self setNeedsDisplay];}// Only override drawRect: if you perform custom drawing.// An empty implementation adversely affects performance during animation.- (void)drawRect:(CGRect)rect {    // Drawing code        [_image drawInRect:rect];}@end