Pixel Width of the text in a UILabel

I need to draw a UILabel striked through. Therefore I subclassed UILabel and implemented it as follows:

@implementation UIStrikedLabel


- (void)drawTextInRect:(CGRect)rect{
[super drawTextInRect:rect];


CGContextRef context = UIGraphicsGetCurrentContext();
CGContextFillRect(context,CGRectMake(0,rect.size.height/2,rect.size.width,1));
}
@end

What happens is that the the UILabel is striked through with a line being as long as the whole label, but the text can be shorter. Is there a way to determine the length of the text in pixels, such that the line can appropriately be drawn?

I'm also open to any other solutions, if known :)

Best, Erik

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最佳答案

NSString has a sizeWithAttributes: method that can be used for this. It returns a CGSize structure, so you could do something similar to the following to find the width of the text inside your label.

iOS 7 and higher

CGSize textSize = [[label text] sizeWithAttributes:@{NSFontAttributeName:[label font]}];


CGFloat strikeWidth = textSize.width;

iOS <7

Prior to iOS7, you had to use the sizeWithFont: method.

CGSize textSize = [[label text] sizeWithFont:[label font]];


CGFloat strikeWidth = textSize.width;

UILabel has a font property that you can use to dynamically get the font details for your label as i'm doing above.

Hope this helps :)

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A better solution, here in Swift:
Update:
For Swift 3/4:

@IBOutlet weak var testLabel: UILabel!
// in any function
testLabel.text = "New Label Text"
let width = testLabel.intrinsicContentSize.width
let height = testLabel.intrinsicContentSize.height
print("width:\(width), height: \(height)")

Old Answer:

yourLabel?.text = "Test label text" // sample label text
let labelTextWidth = yourLabel?.intrinsicContentSize().width
let labelTextHeight = yourLabel?.intrinsicContentSize().height
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This will work. Try it

NSDictionary *attrDict = @{NSFontAttributeName : [GenericUtility getOpenSansRegularFontSize:12]};
CGSize stringBoundingBox = [selectedReservationModel.DateLabel sizeWithAttributes: attrDict];
lblDeliveryDateWidth = stringBoundingBox.width;

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