iOS 字串的寬度和高度自適應

標籤：val   字串   system   color   max   name   drawing   return   ora   

//擷取字串的寬度-(float)widthForString:(NSString *)value fontSize:(float)fontSize andHeight:(float)height{    UIColor  *backgroundColor=[UIColor blackColor];    UIFont *font=[UIFont boldSystemFontOfSize:fontSize];    CGRect sizeToFit = [value boundingRectWithSize:CGSizeMake(CGFLOAT_MAX, height) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{                                                                                                                                             NSForegroundColorAttributeName:backgroundColor,                                                                                                                                             NSFontAttributeName:font                                                                                                                                             } context:nil];        return sizeToFit.size.width;}//獲得字串的高度-(float) heightForString:(NSString *)value fontSize:(float)fontSize andWidth:(float)width{    UIColor  *backgroundColor=[UIColor blackColor];    UIFont *font=[UIFont boldSystemFontOfSize:18.0];    CGRect sizeToFit = [value boundingRectWithSize:CGSizeMake(width, CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{                                       NSForegroundColorAttributeName:backgroundColor,                                       NSFontAttributeName:font                                       } context:nil];    return sizeToFit.size.height;}

 

iOS 字串的寬度和高度自適應