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How to take high-quality screenshot with UIGraphicsImageRenderer programmatically?

由 血红的双手。 提交于 2021-01-15 07:59:25
问题 PROBLEM : After I take screenshot the image is blurry when check by zooming. The text inside image seems to be blurred when zoomed. I know this question have been raised many a times but none of them have desired solution. I already checked quite a few post like this one All the solution been shared so far on this forum are repeated or same in any other way but none of them has a solution for the problem. Here is what I am doing: extension UIView { func asImage() -> UIImage? { let format =

How to take high-quality screenshot with UIGraphicsImageRenderer programmatically?

由 孤街浪徒 提交于 2021-01-15 07:57:53
问题 PROBLEM : After I take screenshot the image is blurry when check by zooming. The text inside image seems to be blurred when zoomed. I know this question have been raised many a times but none of them have desired solution. I already checked quite a few post like this one All the solution been shared so far on this forum are repeated or same in any other way but none of them has a solution for the problem. Here is what I am doing: extension UIView { func asImage() -> UIImage? { let format =

How to take high-quality screenshot with UIGraphicsImageRenderer programmatically?

由 …衆ロ難τιáo~ 提交于 2021-01-15 07:57:26
问题 PROBLEM : After I take screenshot the image is blurry when check by zooming. The text inside image seems to be blurred when zoomed. I know this question have been raised many a times but none of them have desired solution. I already checked quite a few post like this one All the solution been shared so far on this forum are repeated or same in any other way but none of them has a solution for the problem. Here is what I am doing: extension UIView { func asImage() -> UIImage? { let format =

ios圆角图片的实现

由 牧云@^-^@ 提交于 2020-12-19 10:15:52
图片做圆角是非常常见的，一般用做用户头像什么，ios中怎么实现呢： 1.layer层修改 UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"huabianwl003"]]; imageView.center = self.view.center; [self.view addSubview:imageView]; [imageView.layer setCornerRadius:imageView.frame.size.width/2]; [imageView.layer setMasksToBounds:YES]; 这里注意一点，使用了cornerRaius后，shadow投影就无效果了，怎么样能又是圆角又有投影呢，做两层吧！ 这个方式是ios开发中最常用的，方便简单，但是开销的性能比较大，尤其在tableView中重用的cell里面使用。具体消耗可以看看这篇文章： http://www.cocoachina.com/ios/20150803/12873.html 2.重绘图片 - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view,

UIImage to CIImage to UIImage results in pngData returning nil on iOS 12

由 守給你的承諾、 提交于 2020-12-13 17:59:15
问题 I have an UIImage that I snap from the camera. I want to do some image manipulations so I transform it to a CIImage. CIImage *ciImage = [CIImage imageWithCGImage:snappedImage.CGImage]; Next I do my thing, and then transform it back to a UIImage: UIImage *image = [UIImage imageWithCIImage:ciImage]; If now I want to transform this to data to save it into Core Data for example: NSData *data = UIImagePNGRepresentation(image); the data ends up being nil on iOS 12. (works on iOS 13, same thing

UIImage to CIImage to UIImage results in pngData returning nil on iOS 12

由 我的梦境 提交于 2020-12-13 17:58:21
问题 I have an UIImage that I snap from the camera. I want to do some image manipulations so I transform it to a CIImage. CIImage *ciImage = [CIImage imageWithCGImage:snappedImage.CGImage]; Next I do my thing, and then transform it back to a UIImage: UIImage *image = [UIImage imageWithCIImage:ciImage]; If now I want to transform this to data to save it into Core Data for example: NSData *data = UIImagePNGRepresentation(image); the data ends up being nil on iOS 12. (works on iOS 13, same thing

Stop repeating UIImage background pattern image - Swift

由 纵饮孤独 提交于 2020-12-13 04:52:06
问题 I'm using swipe to delete in UITableView. In swipe I need to add image. When I add image it repeats. How to stop repeating func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? { let deleteButton = UITableViewRowAction(style: .default, title: "Delete") { (action, indexPath) in self.tableView.dataSource?.tableView!(self.tableView, commit: .delete, forRowAt: indexPath) return } deleteButton.backgroundColor = UIColor(patternImage:

How to generate an UIImage from custom text in Swift

由 本秂侑毒 提交于 2020-11-30 14:11:38
问题 I am trying to generate an UIImage from custom text in Swift3 . Using iOS Controls , It's possible to create an UIImage, below is the code: class func imageWithText(txtField: UITextField) -> UIImage { UIGraphicsBeginImageContextWithOptions(txtField.bounds.size, false, 0.0) txtField.layer.render(in: UIGraphicsGetCurrentContext()!) let img = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext() return img! } Note: I know it's also possible to add some text to an image, but I

How to generate an UIImage from custom text in Swift

由 ぃ、小莉子 提交于 2020-11-30 14:09:59
问题 I am trying to generate an UIImage from custom text in Swift3 . Using iOS Controls , It's possible to create an UIImage, below is the code: class func imageWithText(txtField: UITextField) -> UIImage { UIGraphicsBeginImageContextWithOptions(txtField.bounds.size, false, 0.0) txtField.layer.render(in: UIGraphicsGetCurrentContext()!) let img = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext() return img! } Note: I know it's also possible to add some text to an image, but I

How to generate an UIImage from custom text in Swift

由 倖福魔咒の 提交于 2020-11-30 14:09:45
问题 I am trying to generate an UIImage from custom text in Swift3 . Using iOS Controls , It's possible to create an UIImage, below is the code: class func imageWithText(txtField: UITextField) -> UIImage { UIGraphicsBeginImageContextWithOptions(txtField.bounds.size, false, 0.0) txtField.layer.render(in: UIGraphicsGetCurrentContext()!) let img = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext() return img! } Note: I know it's also possible to add some text to an image, but I
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