iOS学习 随笔

一、调整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文字加删除线

  NSDictionary *sub1 = @{NSForegroundColorAttributeName:[UIColor redColor],NSStrikethroughStyleAttributeName:@2};//后面数字是用来调整删除线的粗细

    NSString *strDisplayText3 = @"Red and Green" ;

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

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

    cLabel.attributedText = attributedText3;

这个仍是保存下来吧~http://www.tuicool.com/articles/FBRrUjZ

三、造图片，用于设置按钮点击的颜色

- (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;

}