我正在尝试将集合绑定到DataGridView.事实证明,虽然EditMode设置为EditOnKeystrokeOrF2,但用户无法在此DataGridView中编辑任何内容.
这是简化的代码:
public Supplies()
{
InitializeComponent();
List<string> l = new <string>();
l.Add("hello");
this.SuppliesDataGridView.DataSource = l;
}
当我将集合类型更改为SortableBindingList,Dictionary或甚至使用BindingSource时,它也不起作用.
这可能有什么不对？
我知道我可以使用此命令查找不到一周前创建或修改的目录:
find /home -type d -mtime -7
但是如何查找不到一周前创建的目录？
我正在将FBLoginView添加到我的ViewController <FBLoginViewDelegate>:
FBLoginView *loginview = [[FBLoginView alloc] init];
loginview.frame = CGRectOffset(loginview.frame, 5, 5);
loginview.delegate = self;
[self.view addSubview:loginview];
[loginview sizeToFit];
plist中的所有必要字段(FacebookAppID,FacebookDisplayName,URL Schemes)都是根据教程设置的.Facebook应用程序也根据教程配置(设置了包ID,启用了Facebook登录).
但登录仍未执行.当我按下"登录"时,我会通过Facebook登录重定向到浏览器,但是当它完成后,我没有登录应用程序(loginViewFetchedUserInfo:用户:未调用,"登录"未更改"退出").可能是什么问题？
例如,由于某种原因initWithNibName:bundle:我无法看到其值self.view.bounds.size.width,必须停止程序并使用NSLog.当我输入self.view.bounds.size.width手表时,我会在右侧显示"输入表达式"消息.当我输入print self.view.bounds.size.width调试控制台时,出现以下错误:
error: unsupported expression with unknown type
error: 1 errors parsing expression
有没有办法看到我使用NSLog可以看到的所有值？
编辑:由@ Abizern的建议尝试p self.view.bounds.size.width和po self.view.bounds.size.width- 相同的结果.
我正在尝试将C++库添加到iOS项目中.我将源代码文件添加到项目中,但似乎它们不像C++代码那样被解释.
例如,我在头文件中收到以下错误:
namespace soundtouch // Unknown type name 'namespace'
{
我已经尝试将文件检查器中的类型更改为"C++源代码"和"C++标题" - 没有任何更改.
如何将C++库导入XCode项目？
我试图绑定List<T>到DataGridView.在实现删除行之前,一切似乎都没问题:
Companies.CompaniesList.RemoveAt(dataGridView1.SelectedRows[0].Index);
dataGridView1.DataSource = Companies.CompaniesList;
(Companies.Companies是List<Company>收藏)我得到的是数据错误消息(虽然行已成功删除).我试过这个:
Companies.CompaniesList.RemoveAt(dataGridView1.SelectedRows[0].Index);
bs = new BindingSource();
bs.DataSource = Companies.CompaniesList;
dataGridView1.DataSource = bs;
它按预期工作.问题是:为什么？
官方Python教程声明Python中的Unicode字符串可以像这样使用:
u'Hello World !'
但是当我把它放到IDLE - Python 3.2的Python GUI时,它给了我一个语法错误.俄语和中文文本也可以成功存储在Python字符串中,所以我猜它们已经是Unicode了.
你能解释一下发生了什么吗？
我正在尝试使用Minitest中的自定义标头发送请求:
get '/api/v1/tasks/all', nil, {:authorization => 'sdlfjkvnsdfljn'}
但由于某种原因,请求标头未被发送.这是价值request.headers.env:
"{"rack.version"=>[1, 2], "rack.input"=>#<StringIO:0x000000055a55f0>, "rack.errors"=>#<StringIO:0x000000055a5708>, "rack.multithread"=>true, "rack.multiprocess"=>true, "rack.run_once"=>false, "REQUEST_METHOD"=>"GET", "SERVER_NAME"=>"example.org", "SERVER_PORT"=>"80", "QUERY_STRING"=>"", "PATH_INFO"=>"/api/v1/tasks/all", "rack.url_scheme"=>"http", "HTTPS"=>"off", "SCRIPT_NAME"=>"", "CONTENT_LENGTH"=>"0", "rack.test"=>true, "REMOTE_ADDR"=>"127.0.0.1", "HTTP_HOST"=>"example.org", "HTTP_COOKIE"=>"", "ORIGINAL_FULLPATH"=>"/api/v1/tasks/all", "ORIGINAL_SCRIPT_NAME"=>"", "action_dispatch.routes"=>#<ActionDispatch::Routing::RouteSet:0x00000005183788>, "action_dispatch.parameter_filter"=>[:password], "action_dispatch.redirect_filter"=>[], "action_dispatch.secret_token"=>"21a9fdaa0b07f7e418e9a7c838e124fd1f3fbd2b65fb1520f8d38e10d643ce33cc46995f359bd38bfbc9335905fbdeb8af6879ebae131d3fe76f69a9619f6b37", "action_dispatch.secret_key_base"=>"a021d8b08999858216f202033b8124c4c8ec34590c3c62bec68e08e37526176c64d3d396b1e9109f74966b22056a65f557d6fd761093992d5641eb8a741bfc39", "action_dispatch.show_exceptions"=>false, "action_dispatch.show_detailed_exceptions"=>true, "action_dispatch.logger"=>#<ActiveSupport::Logger:0x00000005103e70 @progname=nil, @level=0, @default_formatter=#<Logger::Formatter:0x00000005103df8 @datetime_format=nil>, @formatter=#<ActiveSupport::Logger::SimpleFormatter:0x00000005c487b8 @datetime_format=nil>, @logdev=#<Logger::LogDevice:0x00000005103da8 @shift_size=nil, @shift_age=nil, @filename=nil, @dev=#<File:/home/sergey/Desktop/git2/bo.crmtronic.com/log/test.log>, @mutex=#<Logger::LogDevice::LogDeviceMutex:0x00000005103d80 @mon_owner=nil, @mon_count=0, @mon_mutex=#<Mutex:0x00000005103d30>>>>, "action_dispatch.backtrace_cleaner"=>#<Rails::BacktraceCleaner:0x000000050f0d48 @filters=[#<Proc:0x000000050f0c80@/home/sergey/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/backtrace_cleaner.rb:10>, #<Proc:0x000000050f0c30@/home/sergey/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/backtrace_cleaner.rb:11>, #<Proc:0x000000050f0c08@/home/sergey/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/backtrace_cleaner.rb:12>, #<Proc:0x000000050f03c0@/home/sergey/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/backtrace_cleaner.rb:24>], @silencers=[#<Proc:0x000000050f0398@/home/sergey/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/backtrace_cleaner.rb:15>]>, "action_dispatch.key_generator"=>#<ActiveSupport::CachingKeyGenerator:0x000000055a0230 @key_generator=#<ActiveSupport::KeyGenerator:0x000000055a0280 @secret="a021d8b08999858216f202033b8124c4c8ec34590c3c62bec68e08e37526176c64d3d396b1e9109f74966b22056a65f557d6fd761093992d5641eb8a741bfc39", @iterations=1000>, @cache_keys=#<ThreadSafe::Cache:0x000000055a0208 @backend={"encrypted cookie64"=>"\xD6Q\xF1\xD9\xA6w\x18\x80\xB1,\xE3\xB6\x8EQ\xC0'.-\xE5\xA3\x80$\xD8\xAD\xD8\n\xDD\x84\xCED\xE4q\xDA\xC8W\xB5\xE7m\xE8a\xC6\xD8\r\xA0\xA1Q\xC5ug\xD5R\x9C\x96\xE7vIZC\xAC\xEB\x92h\b\x89", "signed encrypted cookie64"=>" \xA2\xAF\t\xADr_\x1A\x87q\x00\xC0\x8DO2\xEF\x1ElZ5\xB6\xBAS\x9Em\x16crM\xEC\xC5\xEF\xD4\x8E\xDCC\xDB\xA5K\xE88\xCFl\x1F\x86\e\x99\xC0\xD0\xEF\xB9:\xAA\xE2Y\xB9h\xF3\xB4Mz\x9E] "}, @default_proc=nil>>, "action_dispatch.http_auth_salt"=>"http authentication", "action_dispatch.signed_cookie_salt"=>"signed cookie", "action_dispatch.encrypted_cookie_salt"=>"encrypted cookie", …我将此代码放在我的 Rakefile 中，以便能够从附加文件夹“test/classes”（不仅仅是来自 test/models、test/controllers 等）运行测试：
# Adding test/classes directory to rake test.
namespace :test do # line 9
desc "Test tests/classes/* code"
Rails::TestTask.new(parsers: 'test:prepare') do |t| # line 11
t.pattern = 'test/classes/**/*_test.rb'
end
end
Rake::Task['test:run'].enhance ["test:classes"]
当我运行rails test.
但是当我运行时rails db:migrate，我收到此错误：
NameError: uninitialized constant Rails::TestTask
/Users/Developer/project/Rakefile:11:in `block in <top (required)>'
/Users/Developer/project/Rakefile:9:in `<top (required)>'
我该怎么做才能摆脱错误，但仍然能够从