计算文字所占大小

//计算文字所占大小

- (CGSize)getSizeByString:(NSString*)string AndFontSize:(CGFloat)font

{

    CGSize size = [string boundingRectWithSize:CGSizeMake(ScreenWidth-46, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:font]} context:nil].size;

    return size;

}