iOS學習 隨筆

一、調整UILabel的行距

    NSMutableAttributedString *attStr = [[NSMutableAttributedString alloc]initWithString:cLabelString];

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

    [paraStyle setLineSpacing:28];

    [attStr addAttribute:NSParagraphStyleAttributeName value:paraStyle range:NSMakeRange(0, attStr.length)];

    cLabel.attributedText = attStr;

    [cLabel sizeToFit];

二、UILabel文字加刪除線

  NSDictionary *sub1 = @{NSForegroundColorAttributeName:[UIColor redColor],NSStrikethroughStyleAttributeName:@2};//後面數字是用來調整刪除線的粗細

    NSString *strDisplayText3 = @"Red and Green" ;

    NSMutableAttributedString *attributedText3 = [[ NSMutableAttributedString alloc ] initWithString :strDisplayText3];

    [attributedText3 setAttributes :sub1 range : NSMakeRange ( 0 , 3 )];

    cLabel.attributedText = attributedText3;

這個仍是保存下來吧~http://www.tuicool.com/articles/FBRrUjZ

三、造圖片，用於設置按鈕點擊的顏色

- (UIImage *)imageWithColor:(UIColor *)color size:(CGSize)size {

     

         CGRect rect = CGRectMake(0, 0, size.width, size.height);

         UIGraphicsBeginImageContext(rect.size);

     

         CGContextRef context = UIGraphicsGetCurrentContext();

     

         CGContextSetFillColorWithColor(context, [color CGColor]);

     

         CGContextFillRect(context, rect);

         UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

     

         UIGraphicsEndImageContext();

         return image;

}