iOS基础（十六）——动态获取label的高度

动态获取label的高度

+ (CGFloat)heighForText:(NSString *)string andScreenWidth:(CGFloat)width{
    
    NSMutableAttributedString *attrStr = [[NSMutableAttributedString alloc] initWithString:string];
    
    NSRange allRange = [string rangeOfString:string];
    
    [attrStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:14.0] range:allRange];
    
    [attrStr addAttribute:NSForegroundColorAttributeName value:[UIColor darkGrayColor]range:allRange];
    
    CGFloat titleHeight;
    
    NSStringDrawingOptions options = NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading;
    
    //获取label的最大宽度
    
    CGRect rect = [attrStr boundingRectWithSize:CGSizeMake(width, CGFLOAT_MAX)options:options context:nil];
    
    titleHeight = ceilf(rect.size.height);
    
    return titleHeight;
    
}