Posted on

controller

1
before_action :detect_browser, only: :index

在对应的action里面

1
2
3
4
5
respond_to do |format|
      format.html do |variant|
        variant.mobile
      end 
    end

方法

1
2
3
def detect_browser
  request.variant = :mobile if browser.device.mobile?
end

页面名称 例如：index.html+mobile.erb
这样在手机上就会自动走手机版的页面了

ps: 不用添加路由

tag 嵌套

Posted on

如果想在a标签之中嵌套a标签 比较简单的方法是在内层的a标签外嵌套一层 object 标签
但是这种方法 IE8及以下是不支持的，chrome firefox IE9及以上均支持

IE8及以下建议：将两层a 标签都做成绝对定位将位置分开

Posted on

右上左下
background:
linear-gradient(135deg, transparent 49.5%, deeppink 49.5%, deeppink 50.5%, transparent 50.5%);
左上右下
background:
linear-gradient(45deg, transparent 49.5%, deeppink 49.5%, deeppink 50.5%, transparent 50.5%);

Posted on

html

1
2
3
4
5
<div class="other-example-divider">
  <span class="line"></span>
  <span class="text">文字</span>
  <span class="line"></span>
</div>

css

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
.other-example-divider
    padding-left: 30px
    padding-right: 42px
    height: 20px
    width: 100%
    display: flex
    justify-content: space-between
    align-items: center
    .text
      color: #9c9c9c
      padding-left: 20px
      padding-right: 20px
    .line
      height: 2px 
      flex-grow: 1
      background-color: #dedfe1

Posted on

lstrip : 去掉首空格

rstrip : 去掉尾空格

gsub : 去掉全部空格,不过要用到pattern匹配

eg:

s1 = “ Test whitespace”
s2 = “ hello Ruby Rails “
s3 = “trailing “
puts s1.lstrip+s3 # show lstrip remove leading whitespace
puts s2.rstrip+s3 # show rstrip remove trail whitespace
puts s1.strip + s2.strip + s3 # show strip remove leading and trail whitespace
puts s2.gsub(/\s+/,’’)
puts s2.gsub(‘ ‘,’’)
puts s2.gsub!(‘ ‘,’’)
puts s2.gsub(//,’’) # four methods show remove all whitespace

str.gsub(/^ | $/,””)去掉首尾空格

Posted on

overflow: hidden;
white-space: nowrap;
text-overflow: ellipsis;

ps：对于table来说要给 table 加一个 

1
2
3
table {
  table-layout: fixed;
}

Posted on

361515911136_.pic_hd.jpg

禁止：cursor: not-allowed;

Posted on

找到会出现tooltip的外层
用这个class .tooltip-inner {
width: xxx;
}

Posted on 
1
2
3
4
5
6
7
8
9
10
 - (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL))completionHandler{
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:message?:@"" preferredStyle:UIAlertControllerStyleAlert];
    [alertController addAction:([UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(NO);
    }])];
    [alertController addAction:([UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(YES);
    }])];
    [self presentViewController:alertController animated:YES completion:nil];
}

ps: 一定要加
_webView.UIDelegate = self;