因为涉及到访问相册，所以先在plist文件里面添加NSPhotoLibraryUsageDescription允许应用程序访问你的相册
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
// self.testView:要生成为图片的view
UIGraphicsBeginImageContextWithOptions(self.testView.bounds.size, 0, [[UIScreen mainScreen] scale]);
[self.testView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(viewImage, self, @selector(imageSavedToPhotosAlbum:didFinishSavingWithError:contextInfo:), nil);
});
}
- (void)imageSavedToPhotosAlbum:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo
{
if (!error) {
NSLog(@"成功");
}else {
NSLog(@"失败 - %@",error);
}
}
