点击图片看放大图

试着先去记录一些初级的代码

实现效果:

点击图片看放大图(自己可以在里面添加给图片缩放的功能)

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在第一个ViewController里的代码:

// 创建数组的属性

@property (nonatomic, retain) NSMutableArray *array;

- (void)viewDidLoad {

[super viewDidLoad];

self.view.backgroundColor = [UIColor orangeColor];

// 1.创建存放图片的数组

self.array = [NSMutableArray arrayWithObjects:@"1.jpg", @"2.jpg", @"3.jpg", @"4.jpg", @"5.jpg", @"6.jpg", @"7.jpg", nil];

// 2.创建一个UIImageView, 让图片从数组中的第一张开始显示(设置下标为0)

UIImageView *img = [[UIImageView alloc] initWithFrame:CGRectMake(20, 100, 300, 200)];

img.image = [UIImage imageNamed:[self.array objectAtIndex:0]];

// 3.把图片放到view上

[self.view addSubview:img];

// 4.打开UIImageView的用户交互

img.userInteractionEnabled = YES;

// 5.填充图片(就是只截取图片的中心区域,保证图片不因为UIImageView)的大小而改变尺寸

img.contentMode = UIViewContentModeScaleAspectFill;

// 6.裁掉边框

img.clipsToBounds = YES;

// 7.创建轻拍手势

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction:)];

// 8.把轻拍手势加在图片上

[img addGestureRecognizer:tap];

}

// 轻拍手势的方法

- (void)tapAction:(UITapGestureRecognizer *)tap

{

// 1.push到FirstViewController

FirstViewController *firstVC = [[FirstViewController alloc] init];

// 2.传存图片的数组

firstVC.firstArray = self.array;

// 3.换个模态的样式

[firstVC setModalTransitionStyle:UIModalTransitionStyleCrossDissolve];

[self presentViewController:firstVC animated:YES completion:^{

}];

}

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在第二个ViewController里的代码:

// 创建接收的数组的属性(且必须在.h里声明,因为要接收前一个页面传来的数组)

@property (nonatomic, retain) NSMutableArray *firstArray;

- (void)viewDidLoad {

[super viewDidLoad];

self.view.backgroundColor = [UIColor redColor];

// 1.创建轮播图的UIScrollView

UIScrollView *myScrollV = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 375, 667)];

myScrollV.backgroundColor = [UIColor blackColor];

// 2.设置是否按页滑动

myScrollV.pagingEnabled = YES;

// 3.设置关闭边界反弹

myScrollV.bounces = NO;

// 4.把UIScrollView放到view上

[self.view addSubview:myScrollV];

// 5.设置UIScrollView的滑动范围

myScrollV.contentSize = CGSizeMake(375 * self.firstArray.count, 667);

// 6.遍历数组,取出前面的页面传来的图片,并放在myScrollV上

for (int i = 0; i < self.firstArray.count; i++) {

UIImageView *img = [[UIImageView alloc] initWithFrame:CGRectMake(375 * i + 10, 0, 355, 667)];

NSString *imgName = self.firstArray[i];

img.image = [UIImage imageNamed:imgName];

[myScrollV addSubview:img];

// 7.自动适应图片的大小

img.contentMode = UIViewContentModeScaleAspectFit;

}

// 创建轻拍手势

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction:)];

[myScrollV addGestureRecognizer:tap];

}

// 轻拍手势的方法:(模态消失)

- (void)tapAction:(UITapGestureRecognizer *)tap

{

[self dismissViewControllerAnimated:YES completion:^{

}];

}