Это должно было предложено раньше, но я не могу найти ссылку .. Я создаю изображение, используя код (спасибо Бен Морроу)watchOS - Есть ли способ сохранить изображение, нарисованное на часах, в PhotoLibrary?
let rect = panGesture.objectBounds()
switch panGesture.state {
case .began:
randomColor()
previousPoint1 = panGesture.locationInObject()
// create backward projection
let velocity = panGesture.velocityInObject()
// the pan gesture recognizer requires some movement before recognition
// this multiplier accounts for the delay
let multiplier: CGFloat = 1.75
previousPoint2 = CGPoint(x: previousPoint1.x - exponentialScale(velocity.x) * multiplier,
y: previousPoint1.y - exponentialScale(velocity.y) * multiplier)
case .changed:
let currentPoint = panGesture.locationInObject()
// draw a curve through the two mid points between three points. The middle point acts as a control point
// this creates a smoothly connected curve
// a downside to this apprach is that the drawing doesn't reach all the way to the the user's finger touch. We create forward and backward projections with the velocity to account for the lag
let actualImage = curveThrough(a: previousPoint2, b: previousPoint1, c: currentPoint, in: rect)
savedImage = actualImage
// create forward projection
let velocity = panGesture.velocityInObject()
let projectedPoint = CGPoint(x: currentPoint.x + exponentialScale(velocity.x), y: currentPoint.y + exponentialScale(velocity.y))
let projectedImage = curveThrough(a: previousPoint1,
b: currentPoint,
c: midPoint(currentPoint, projectedPoint),
in: rect,
with: 0.5)
// show the forward projection but don't save it
canvasGroup.setBackgroundImage(projectedImage)
previousPoint2 = previousPoint1
previousPoint1 = currentPoint
case .ended:
let currentPoint = panGesture.locationInObject()
let image = curveThrough(a: previousPoint2, b: previousPoint1, c: currentPoint, in: rect)
canvasGroup.setBackgroundImage(image)
savedImage = image
default:
break
}
}
Есть ли способ, чтобы сохранить полученное изображение в библиотека фотографий? Благодаря
Спасибо Josip, очень полезно. –