我有3个文本字段。我试图让它有一个Next按钮，从第1个到第2个，第2个到第3个，以及完成第3个按钮后完成。
这是我的代码：
Acknowledgement这根本不起作用。我该怎么办？
答案 0 :(得分：0)
对于NumberPad类型的键盘类型，iOS无法显示返回键。所以你可以这样试试。
Access denied for user 'root'@'localhost' (using password: YES) (Mysql2::Error)
Exception class:
PhusionPassenger::UnknownError
Application root:
/usr/local/sipfish/webui
Backtrace:
# File Line Location
0 /usr/lib64/ruby/gems/1.9.1/gems/mysql2-0.3.11/lib/mysql2/client.rb 44 in `connect'
1 /usr/lib64/ruby/gems/1.9.1/gems/mysql2-0.3.11/lib/mysql2/client.rb 44 in `initialize'
2 /usr/lib64/ruby/gems/1.9.1/gems/activerecord-3.1.12/lib/active_record/connection_adapters/mysql2_adapter.rb 17 in `new'
3 /usr/lib64/ruby/gems/1.9.1/gems/activerecord-3.1.12/lib/active_record/connection_adapters/mysql2_adapter.rb 17 in `mysql2_connection'
4 /usr/lib64/ruby/gems/1.9.1/gems/activerecord-3.1.12/lib/active_record/connection_adapters/abstract/connection_pool.rb 304 in `new_connection'
5 /usr/lib64/ruby/gems/1.9.1/gems/activerecord-3.1.12/lib/active_record/connection_adapters/abstract/connection_pool.rb 323 in `checkout_new_connection'
6 /usr/lib64/ruby/gems/1.9.1/gems/activerecord-3.1.12/lib/active_record/connection_adapters/abstract/connection_pool.rb 265 in `block (2 levels) in checkout'
7 /usr/lib64/ruby/gems/1.9.1/gems/activerecord-3.1.12/lib/active_record/connection_adapters/abstract/connection_pool.rb 261 in `loop'
8 /usr/lib64/ruby/gems/1.9.1/gems/activerecord-3.1.12/lib/active_record/connection_adapters/abstract/connection_pool.rb 261 in `block in checkout'
9 /usr/lib64/ruby/1.9.1/monitor.rb 211 in `mon_synchronize'
10 /usr/lib64/ruby/gems/1.9.1/gems/activerecord-3.1.12/lib/active_record/connection_adapters/abstract/connection_pool.rb 260 in `checkout'
11 /usr/lib64/ruby/gems/1.9.1/gems/activerecord-3.1.12/lib/active_record/connection_adapters/abstract/connection_pool.rb 162 in `connection'
12 /usr/lib64/ruby/gems/1.9.1/gems/activerecord-3.1.12/lib/active_record/connection_adapters/abstract/connection_pool.rb 409 in `retrieve_connection'
13 /usr/lib64/ruby/gems/1.9.1/gems/activerecord-3.1.12/lib/active_record/connection_adapters/abstract/connection_specification.rb 115 in `retrieve_connection'
14 /usr/lib64/ruby/gems/1.9.1/gems/activerecord-3.1.12/lib/active_record/connection_adapters/abstract/connection_specification.rb 89 in `connection'
15 /usr/local/sipfish/webui/config/initializers/verify_voip_phone_parity.rb 1 in `'
16 /usr/lib64/ruby/gems/1.9.1/gems/activesupport-3.1.12/lib/active_support/dependencies.rb 234 in `load'
17 /usr/lib64/ruby/gems/1.9.1/gems/activesupport-3.1.12/lib/active_support/dependencies.rb 234 in `block in load'
18 /usr/lib64/ruby/gems/1.9.1/gems/activesupport-3.1.12/lib/active_support/dependencies.rb 225 in `load_dependency'
19 /usr/lib64/ruby/gems/1.9.1/gems/activesupport-3.1.12/lib/active_support/dependencies.rb 234 in `load'
20 /usr/lib64/ruby/gems/1.9.1/gems/railties-3.1.12/lib/rails/engine.rb 556 in `block (2 levels) in '
21 /usr/lib64/ruby/gems/1.9.1/gems/railties-3.1.12/lib/rails/engine.rb 555 in `each'
22 /usr/lib64/ruby/gems/1.9.1/gems/railties-3.1.12/lib/rails/engine.rb 555 in `block in '
23 /usr/lib64/ruby/gems/1.9.1/gems/railties-3.1.12/lib/rails/initializable.rb 30 in `instance_exec'
24 /usr/lib64/ruby/gems/1.9.1/gems/railties-3.1.12/lib/rails/initializable.rb 30 in `run'
25 /usr/lib64/ruby/gems/1.9.1/gems/railties-3.1.12/lib/rails/initializable.rb 55 in `block in run_initializers'
26 /usr/lib64/ruby/gems/1.9.1/gems/railties-3.1.12/lib/rails/initializable.rb 54 in `each'
27 /usr/lib64/ruby/gems/1.9.1/gems/railties-3.1.12/lib/rails/initializable.rb 54 in `run_initializers'
28 /usr/lib64/ruby/gems/1.9.1/gems/railties-3.1.12/lib/rails/application.rb 96 in `initialize!'
29 /usr/lib64/ruby/gems/1.9.1/gems/railties-3.1.12/lib/rails/railtie/configurable.rb 30 in `method_missing'
30 /usr/local/sipfish/webui/config/environment.rb 5 in `'
31 config.ru 3 in `require'
32 config.ru 3 in `block in
'
33 /usr/lib64/ruby/gems/1.9.1/gems/rack-1.3.10/lib/rack/builder.rb 51 in `instance_eval'
34 /usr/lib64/ruby/gems/1.9.1/gems/rack-1.3.10/lib/rack/builder.rb 51 in `initialize'
35 config.ru 1 in `new'
36 config.ru 1 in `
'
37 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/rack/application_spawner.rb 225 in `eval'
38 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/rack/application_spawner.rb 225 in `load_rack_app'
39 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/rack/application_spawner.rb 157 in `block in initialize_server'
40 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/utils.rb 572 in `report_app_init_status'
41 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/rack/application_spawner.rb 154 in `initialize_server'
42 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/abstract_server.rb 204 in `start_synchronously'
43 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/abstract_server.rb 180 in `start'
44 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/rack/application_spawner.rb 129 in `start'
45 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/spawn_manager.rb 253 in `block (2 levels) in spawn_rack_application'
46 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/abstract_server_collection.rb 132 in `lookup_or_add'
47 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/spawn_manager.rb 246 in `block in spawn_rack_application'
48 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/abstract_server_collection.rb 82 in `block in synchronize'
49 prelude> 10:in `synchronize'
50 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/abstract_server_collection.rb 79 in `synchronize'
51 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/spawn_manager.rb 244 in `spawn_rack_application'
52 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/spawn_manager.rb 137 in `spawn_application'
53 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/spawn_manager.rb 275 in `handle_spawn_application'
54 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/abstract_server.rb 357 in `server_main_loop'
55 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11/lib/phusion_passenger/abstract_server.rb 206 in `start_synchronously'
56 /usr/lib64/ruby/gems/1.9.1/gems/passenger-3.0.11//helper-scripts/passenger-spawn-server 99 in `