根据文字改变高度的Label

    NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];

    style.lineSpacing = 5;

    style.firstLineHeadIndent = 30;

    

    NSDictionary*dict1 = @{NSForegroundColorAttributeName:[UIColor blackColor],NSFontAttributeName:[UIFont boldSystemFontOfSize:17],NSParagraphStyleAttributeName:style.copy};

    CGRect sii = [strin1g boundingRectWithSize:CGSizeMake(label.frame.size.width, CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin attributes:dict1 context:nil];

    NSLog(@"%lf",sii.size.height);

    label.numberOfLines = 0;

    CGRect frame = label.frame;

    frame.size.height = sii.size.height;

    label.frame = frame;

    label.attributedText = [[NSAttributedString alloc] initWithString:strin1g attributes:dict1];