在IOS

Question

從UIImage的得到協調和框架如何從UIImage形狀的框架，我使用的圖像像

請人幫我實現這一目標。

Answer 1

您可以從imageView框架獲得此信息，該框架包含圖像內部或圖像自身。既然你沒有說無論您使用的ImageView或不在這裏既是：

越來越尺寸和ImageView的座標：

let x:CGFloat = imageView.frame.origin.x 
let y:CGFloat = imageView.frame.origin.y 

let width:CGFloat = imageView.frame.size.width 
let height:CGFloat = imageView.frame.size.height 

從UIImage的（沒有座標）獲得大小：

let width:CGFloat = image.size.width 
let height:CGFloat = image.size.height 

Answer 2

Swift 3 Xcode 8。 它只能在viewDidAppear功能

@IBOutlet var myImage: UIImageView! 

override func viewDidAppear(_ animated: Bool) { 
    super.viewDidAppear(animated) 

    let Height = myImage.frame.height 
    let Width = myImage.frame.width 
    let xPosition = myImage.frame.minX 
    let yPosition = myImage.frame.minY 

    print("Height: \(Height), width: \(Width), xPosition: \(xPosition), yPosition: \(yPosition)") 

} 

Answer 3

從圖像讀取的像素，並獲得CGRect之後，從圖像與您的設備的寬度和高度進行比較。

- (CGRect)getRectFromImage:(UIImage*)image 
{ 

    // First get the image into your data buffer 
    CGImageRef imageRef = [image CGImage]; 
    NSUInteger width = CGImageGetWidth(imageRef); 
    NSUInteger height = CGImageGetHeight(imageRef); 
    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); 
    unsigned char *rawData = malloc(height * width * 4); 
    NSUInteger bytesPerPixel = 4; 
    NSUInteger bytesPerRow = bytesPerPixel * width; 
    NSUInteger bitsPerComponent = 8; 
    CGContextRef context = CGBitmapContextCreate(rawData, width, height, 
               bitsPerComponent, bytesPerRow, colorSpace, 
               kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big); 
    CGColorSpaceRelease(colorSpace); 

    CGContextDrawImage(context, CGRectMake(0, 0, width, height), imageRef); 
    CGContextRelease(context); 


    int x = 0; 
    int y = 0; 
    int xPos = 0; 
    int yPos = 0; 

    int xMax = 0; 
    int yMax = 0; 


    for (x = 0; x < width; x++) { 
     for (y = 0; y < height; y++) { 
      unsigned char alphaByte = rawData[(y*bytesPerRow)+(x*bytesPerPixel)+3]; 
      if (alphaByte > 0) { 

      if (xPos == 0) { 
       xPos = x; 
      } 

      if (yPos == 0) { 
       yPos = y; 
      }    
       if (x < xPos) { 
        xPos = x; 
       } 

       if (y < yPos) { 
        yPos = y; 
       } 

       if (x > xMax) { 
        xMax = x; 
       } 

       if (y > yMax) { 
        yMax = y; 
       } 
      } 
     } 
    } 

    NSLog(@"(%i,%i,%i,%i)", xPos, yPos,xMax-xPos,yMax-yPos); 


    free(rawData); 

    return CGRectMake(xPos, yPos, xMax-xPos, yMax-yPos); 
}