ios图片剪切

最新推荐文章于 2022-06-20 18:28:12 发布

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最新推荐文章于 2022-06-20 18:28:12 发布

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原文链接：http://www.cnblogs.com/daijiahong/p/4183265.html

本文介绍了在iOS应用中实现截图功能的方法，包括如何截取视图的一部分并将其显示在UIImageView中，以及如何将截图保存为JPEG和PNG格式的文件。

#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIImageView *imageView;

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];

    UIImage *image = [UIImage imageNamed:@"1"];
//    截取屏幕位置
    CGImageRef dst = CGImageCreateWithImageInRect(image.CGImage, CGRectMake(0, 0, 50, 50));
//    将截取的屏幕放在另一个view中
    _imageView.image = [UIImage imageWithCGImage:dst];

}
- (IBAction)paly:(id)sender {
    UIGraphicsBeginImageContext(self.view.frame.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    [self.view.layer renderInContext:context];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    _imageView.image = image;

    NSData *jpgData = UIImageJPEGRepresentation(image, 0);
    [jpgData writeToFile:@"/Users/apple/Desktop/test.jpg" atomically:YES];

    NSData *pngData = UIImagePNGRepresentation(image);
    [pngData writeToFile:@"/Users/apple/Desktop/test.png" atomically:YES];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];


}

@end