ios iphone - 我怎样才能得到uiimage的高度和宽度
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iphone - how can i get the height and width of uiimage
提问by Satyam
From the URL Image in Mail
I'm adding image to mail view. It will show full image. But I want to calculate, proportionally change the height and width of the image.
我正在向邮件视图添加图像。它将显示完整图像。但我想计算，按比例改变图像的高度和宽度。
How can I get the height and width of UIImage?
我怎样才能得到 的高度和宽度UIImage？
回答by Jgubman
let heightInPoints = image.size.height
let heightInPixels = heightInPoints * image.scale
let widthInPoints = image.size.width
let widthInPixels = widthInPoints * image.scale
回答by Anomie
Use the sizeproperty on the UIImage instance. See the documentationfor more details.
使用sizeUIImage 实例上的属性。有关更多详细信息，请参阅文档。
回答by MaxEcho
UIImage *img = [UIImage imageNamed:@"logo.png"];
CGFloat width = img.size.width;
CGFloat height = img.size.height;
回答by Sinuhe Huidobro
Some of the anwsers above, don't work well when rotating device.
上面的一些答案在旋转设备时效果不佳。
Try:
尝试：
CGRect imageContent = self.myUIImage.bounds;
CGFloat imageWidth = imageContent.size.width;
CGFloat imageHeight = imageContent.size.height;
回答by Sayeed S. Alam
UIImageView *imageView = [[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"MyImage.png"]]autorelease];
NSLog(@"Size of my Image => %f, %f ", [[imageView image] size].width, [[imageView image] size].height) ;
回答by ironRoei
import func AVFoundation.AVMakeRect
let imageRect = AVMakeRect(aspectRatio: self.image!.size, insideRect: self.bounds)
x = imageRect.minX
y = imageRect.minY
回答by Bruno Eigenmann
There are a lot of helpful solutions out there, but there is no simplified way with extension. Here is the code to solve the issue with an extension:
有很多有用的解决方案，但没有扩展的简化方法。这是通过扩展解决问题的代码：
extension UIImage {
var getWidth: CGFloat {
get {
let width = self.size.width
return width
}
}
var getHeight: CGFloat {
get {
let height = self.size.height
return height
}
}
}
回答by Wyatt
let imageView: UIImageView = //this is your existing imageView
let imageViewHeight: CGFloat = imageView.frame.height
let imageViewWidth: CGFloat = imageView.frame.width
