我怎样才能让文本比例适合我给它的范围?
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5832 次
3 回答
22
我过去做过这样的事情。
-(void)calcFontSizeToFitRect:(NSRect)r {
float targetWidth = r.size.width - xMargin;
float targetHeight = r.size.height - yMargin;
// the strategy is to start with a small font size and go larger until I'm larger than one of the target sizes
int i;
for (i=minFontSize; i<maxFontSize; i++) {
NSDictionary* attrs = [[NSDictionary alloc] initWithObjectsAndKeys:[NSFont fontWithName:currentFontName size:i], NSFontAttributeName, nil];
NSSize strSize = [stringValue sizeWithAttributes:attrs];
[attrs release];
if (strSize.width > targetWidth || strSize.height > targetHeight) break;
}
[self setCurrentFontSize:(i-1)];
}
stringValue
变量是您想要调整大小的文本。xMargin
和yMargin
变量用于您想要的间距。minFontSize
和maxFontSize
变量限制了您想要的大小。
于 2010-05-26T10:15:34.020 回答
0
这个取自 iOS 的解决方案效果很好。但是,需要注意的一件事:如果您以编程方式进行设置,则需要使用具有宽度和高度的矩形来初始化 NSTextfield,否则bounds
返回 0。
这也是我找到此解决方案的链接: https ://medium.com/@joncardasis/dynamic-text-resizing-in-swift-3da55887beb3
extension NSFont {
/**
Will return the best font conforming to the descriptor which will fit in the provided bounds.
*/
static func bestFittingFontSize(for text: String, in bounds: CGRect, fontDescriptor: NSFontDescriptor, additionalAttributes: [NSAttributedString.Key: Any]? = nil) -> CGFloat {
let constrainingDimension = min(bounds.width, bounds.height)
let properBounds = CGRect(origin: .zero, size: bounds.size)
var attributes = additionalAttributes ?? [:]
let infiniteBounds = CGSize(width: CGFloat.infinity, height: CGFloat.infinity)
var bestFontSize: CGFloat = constrainingDimension
for fontSize in stride(from: bestFontSize, through: 0, by: -1) {
let newFont = NSFont(descriptor: fontDescriptor, size: fontSize)
attributes[.font] = newFont
let currentFrame = text.boundingRect(with: infiniteBounds, options: [.usesLineFragmentOrigin, .usesFontLeading], attributes: attributes, context: nil)
if properBounds.contains(currentFrame) {
bestFontSize = fontSize
break
}
}
return bestFontSize
}
static func bestFittingFont(for text: String, in bounds: CGRect, fontDescriptor: NSFontDescriptor, additionalAttributes: [NSAttributedString.Key: Any]? = nil) -> NSFont {
let bestSize = bestFittingFontSize(for: text, in: bounds, fontDescriptor: fontDescriptor, additionalAttributes: additionalAttributes)
// TODO: Safely unwrap this later
return NSFont(descriptor: fontDescriptor, size: bestSize)!
}
}
extension NSTextField {
/// Will auto resize the contained text to a font size which fits the frames bounds.
/// Uses the pre-set font to dynamically determine the proper sizing
func fitTextToBounds() {
guard let currentFont = font else {
return
}
let text = stringValue
let bestFittingFont = NSFont.bestFittingFont(for: text, in: bounds, fontDescriptor: currentFont.fontDescriptor, additionalAttributes: basicStringAttributes)
font = bestFittingFont
}
private var basicStringAttributes: [NSAttributedString.Key: Any] {
var attribs = [NSAttributedString.Key: Any]()
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.alignment = self.alignment
paragraphStyle.lineBreakMode = self.lineBreakMode
attribs[.paragraphStyle] = paragraphStyle
return attribs
}
}
于 2019-05-22T12:13:45.673 回答
-1
For me label.adjustsFontSizeToFitWidth = true reduces the font size.
with...
lazy var labelContainerView: UIView =
{ let view = UIView()
return view.labelContainerView(view: view, label) }()
extension UIView {
func anchor( top: NSLayoutYAxisAnchor?,
left: NSLayoutXAxisAnchor?,
bottom: NSLayoutYAxisAnchor?,
right: NSLayoutXAxisAnchor?,
paddingTop: CGFloat,
paddingLeft: CGFloat,
paddingBottom: CGFloat,
paddingRight: CGFloat,
width: CGFloat,
height: CGFloat )
{ translatesAutoresizingMaskIntoConstraints = false
if let top = top { self.topAnchor.constraint(equalTo: top, constant: paddingTop).isActive = true }
if let left = left { self.leftAnchor.constraint(equalTo: left, constant: paddingLeft).isActive = true }
if let bottom = bottom { self.bottomAnchor.constraint(equalTo: bottom, constant: -paddingBottom).isActive = true }
if let right = right { self.rightAnchor.constraint(equalTo: right, constant: -paddingRight).isActive = true }
if width != 0 { widthAnchor.constraint(equalToConstant: width).isActive = true }
if height != 0 { heightAnchor.constraint(equalToConstant: height).isActive = true }
}
}
func labelContainerView(view: UIView, _ label: UILabel) -> UIView
{ view.addSubview(label)
label.anchor(top: view.topAnchor, left: view.leftAnchor, bottom: nil, right: nil, paddingTop: 0, paddingLeft: 0, paddingBottom: 0, paddingRight: 0, width: 0, height: 0)
label.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
label.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
return view
}
}
于 2019-09-01T12:20:46.157 回答