How do I calculate the UILabel height dynamically [duplicate]

Answer 1

- (CGFloat)getTextHeightByWidth:(NSString*)text textFont:(UIFont*)textFont textWidth:(float)textWidth {

    if (!text) {
        return 0;
    }
    CGSize boundingSize = CGSizeMake(textWidth, CGFLOAT_MAX);
    NSAttributedString *attributedText = [[NSAttributedString alloc] initWithString:text attributes:@{ NSFontAttributeName: textFont }];

    CGRect rect = [attributedText boundingRectWithSize:boundingSize options:NSStringDrawingUsesLineFragmentOrigin context:nil];
    CGSize requiredSize = rect.size;
    return requiredSize.height;
}

- (CGFloat)getTextWidthByHeight:(NSString*)text textFont:(UIFont*)textFont textHeight:(float)textHeight {

    if (!text) {
        return 0.0f;
    }
    CGSize boundingSize = CGSizeMake(CGFLOAT_MAX, textHeight);

    NSAttributedString *attributedText = [[NSAttributedString alloc] initWithString:text
                                                                         attributes:@{ NSFontAttributeName: textFont }];

    CGRect rect = [attributedText boundingRectWithSize:boundingSize
                                               options:NSStringDrawingUsesLineFragmentOrigin
                                               context:nil];
    CGSize requiredSize = rect.size;
    return requiredSize.width;
}