iOS 中图片裁切生成新的图片

最新推荐文章于 2024-05-09 10:45:38 发布

cym_bj

最新推荐文章于 2024-05-09 10:45:38 发布

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分类专栏： iOS开发

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- (void)viewDidLoad
{
    [super viewDidLoad];

    // 加载被裁切的图片
    UIImage *iconImage=[UIImage imageNamed:@"2398757A-66FC-4154-8FB2-77502C483FE8"];

    //开启上下文
    CGFloat clickW=iconImage.size.width+4;
    CGFloat clickH=iconImage.size.height+4;
    UIGraphicsBeginImageContextWithOptions(CGSizeMake(clickW, clickH), NO, 0.0);
    //创建下下文
    CGContextRef ctx=UIGraphicsGetCurrentContext();

    //画圆设置的白色的框
    CGContextAddArc(ctx, clickW*0.5, clickH*0.5, clickW*0.5, 0, M_PI*2, 0);
    [[UIColor orangeColor]set];
    CGContextFillPath(ctx);

    //要裁切的圆
    CGContextAddArc(ctx, clickW*0.5, clickH*0.5, iconImage.size.width*0.5, 0, M_PI*2, 0);
    CGContextClip(ctx);
    //画图片
    [iconImage drawInRect:CGRectMake(0, 0, iconImage.size.width, iconImage.size.height)];
    UIImage *newImage=UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    UIImageView *imageView=[[UIImageView alloc]initWithImage:newImage];
    [self.view addSubview:imageView];

    //写文件
    NSData *imageData=UIImagePNGRepresentation(newImage);
    NSString *path=[[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES) lastObject] stringByAppendingPathComponent:@"new.png"];

    [imageData writeToFile:path atomically:YES];

}