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Some problems encountered in applet development

小程序开发

2024-01-19 发布浏览：837 次

Recently, I learned how to develop a small program and made a small program for real-time bus query. Some problems encountered during the process are recorded.

1. Vertical and horizontal center

display: flex;

justify-content: center; /* Horizontal Center*/

align-items: center; /* Center Vertically*/

Previously, the height and line height were specified as the same height for vertical centering. When the height was not specified, the above can be used

2. About rpx

At the beginning, I didn't read the official documents carefully. On the iPhone 8, 1px=2rpx, I naively thought that it was 1px=3rpx on the iPhone 8 Plus. As a result, a component display problem was found on a colleague's mobile phone a long time later

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Debug messages:

Template: main

Session:

Session type: db

[unisoft__unisoft] Array ( [permission] => [human_valid] => [passport] => )

Loaded Class:

Zend_Db: /web/unisoft/web.system/Zend/Db.php

Zend_Db_Adapter_Abstract: /web/unisoft/web.system/Zend/Db/Adapter/Abstract.php

Zend_Db_Adapter_Mysqli: /web/unisoft/web.system/Zend/Db/Adapter/Mysqli.php

Zend_Db_Profiler: /web/unisoft/web.system/Zend/Db/Profiler.php

Zend_Db_Statement_Interface: /web/unisoft/web.system/Zend/Db/Statement/Interface.php

Zend_Db_Statement: /web/unisoft/web.system/Zend/Db/Statement.php

Zend_Db_Statement_Mysqli: /web/unisoft/web.system/Zend/Db/Statement/Mysqli.php

Zend_Registry: /web/unisoft/web.system/Zend/Registry.php

Zend_Db_Table_Abstract: /web/unisoft/web.system/Zend/Db/Table/Abstract.php

Zend_Session_Abstract: /web/unisoft/web.system/Zend/Session/Abstract.php

Zend_Session: /web/unisoft/web.system/Zend/Session.php

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Zend_Session_SaveHandler_DbTable: /web/unisoft/web.system/Zend/Session/SaveHandler/DbTable.php

Zend_Exception: /web/unisoft/web.system/Zend/Exception.php

Zend_Session_Exception: /web/unisoft/web.system/Zend/Session/Exception.php

Zend_Db_Select: /web/unisoft/web.system/Zend/Db/Select.php

Zend_Db_Table_Select: /web/unisoft/web.system/Zend/Db/Table/Select.php

Zend_Db_Expr: /web/unisoft/web.system/Zend/Db/Expr.php

Zend_Db_Table_Rowset_Abstract: /web/unisoft/web.system/Zend/Db/Table/Rowset/Abstract.php

Zend_Db_Table_Rowset: /web/unisoft/web.system/Zend/Db/Table/Rowset.php

Zend_Db_Table_Row_Abstract: /web/unisoft/web.system/Zend/Db/Table/Row/Abstract.php

Zend_Db_Table_Row: /web/unisoft/web.system/Zend/Db/Table/Row.php

HTTP: /web/unisoft/web.system/class/cls_http.inc.php

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system_setting_class: /web/unisoft/web.core/system/setting.php

Zend_Cache: /web/unisoft/web.system/Zend/Cache.php

Zend_Cache_Backend: /web/unisoft/web.system/Zend/Cache/Backend.php

Zend_Cache_Backend_Interface: /web/unisoft/web.system/Zend/Cache/Backend/Interface.php

Zend_Cache_Backend_ExtendedInterface: /web/unisoft/web.system/Zend/Cache/Backend/ExtendedInterface.php

site_ip_class: /web/unisoft/web.core/site/ip.php

Zend_Validate_Interface: /web/unisoft/web.system/Zend/Validate/Interface.php

Zend_Validate: /web/unisoft/web.system/Zend/Validate.php

Zend_Loader: /web/unisoft/web.system/Zend/Loader.php

Zend_Validate_Abstract: /web/unisoft/web.system/Zend/Validate/Abstract.php

TPL: /web/unisoft/web.system/class/cls_template.inc.php

Savant3_Error: /web/unisoft/web.system/Savant3/Error.php

package_main_class: /web/unisoft/web.core/package/main.php

iot_hardware_main_class: /web/unisoft/web.core/iot/hardware/main.php

iot_hardware_category_class: /web/unisoft/web.core/iot/hardware/category.php

site_service_main_class: /web/unisoft/web.core/site/service/main.php

site_service_article_main_class: /web/unisoft/web.core/site/service/article/main.php

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site_keyword_exclude_class: /web/unisoft/web.core/site/keyword/exclude.php

system_content_class: /web/unisoft/web.core/system/content.php

site_service_article_attachment_class: /web/unisoft/web.core/site/service/article/attachment.php

data_location_class: /web/unisoft/web.core/data/location.php

Database [main master]

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Cache

[ Log time: 1788077774.1813 ] Backend:

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[ Log time: 1788077774.2124 ] [ Expend time: 0.000738 ] Get Cache: site_service_list_7e49c82f3098f580fb5928807f5e466d, result type: array

[ Log time: 1788077774.2239 ] [ Expend time: 0.003341 ] Get Cache: site_keyword_exclude_b2c64c08a5048d87cc4904022274c118, result type: array

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[ Log time: 1788077774.2364 ] [ Expend time: 0.000430 ] Get Cache: bc6594a3b47d6194e523d7b7cfb84bb7, result type: boolean

[ Log time: 1788077774.2409 ] [ Expend time: 0.002421 ] Save Cache: bc6594a3b47d6194e523d7b7cfb84bb7, result type: integer

[ Log time: 1788077774.3027 ] [ Expend time: 0.003605 ] Get Cache: site_keyword_exclude_b2c64c08a5048d87cc4904022274c118, result type: array

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[ Log time: 1788077774.3573 ] [ Expend time: 0.000504 ] Get Cache: data_location_by_id_566, result type: array

[ Log time: 1788077774.3579 ] [ Expend time: 0.000561 ] Get Cache: data_location_by_id_241, result type: array

[ Log time: 1788077774.3585 ] [ Expend time: 0.000569 ] Get Cache: data_location_by_id_615, result type: array

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[ Log time: 1788077774.3596 ] [ Expend time: 0.000504 ] Get Cache: data_location_by_id_710, result type: array

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[ Log time: 1788077774.3608 ] [ Expend time: 0.000736 ] Get Cache: data_location_by_id_249, result type: array

[ Log time: 1788077774.3613 ] [ Expend time: 0.000429 ] Get Cache: data_location_by_id_502, result type: array

[ Log time: 1788077774.3617 ] [ Expend time: 0.000446 ] Get Cache: data_location_by_id_773, result type: array

[ Log time: 1788077774.3622 ] [ Expend time: 0.000406 ] Get Cache: data_location_list_d6ff08d2e02389b7587e4a98a4149e68, result type: array

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[ Log time: 1788077774.3688 ] [ Expend time: 0.000680 ] Get Cache: data_location_by_id_263, result type: array

[ Log time: 1788077774.3697 ] [ Expend time: 0.000898 ] Get Cache: data_location_by_id_256, result type: array

[ Log time: 1788077774.3702 ] [ Expend time: 0.000485 ] Get Cache: data_location_by_id_251, result type: array

[ Log time: 1788077774.371 ] [ Expend time: 0.000703 ] Get Cache: data_location_by_id_268, result type: array

[ Log time: 1788077774.372 ] [ Expend time: 0.000901 ] Get Cache: data_location_by_id_259, result type: array

[ Log time: 1788077774.3725 ] [ Expend time: 0.000457 ] Get Cache: data_location_by_id_252, result type: array

Database [core master]

[ Log time: 1788077774.1876 ] [ Expend time: 0.0017321109771729 ] Connect DB

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[ Log time: 1788077774.1914 ] [ Expend time: 0.0026400089263916 ] UPDATE z_ip SET visit_count = visit_count + 1 WHERE ip = '216.73.217' and visit_time = 1788077760

[ Log time: 1788077774.1935 ] [ Expend time: 0.0014989376068115 ] DELETE FROM z_ip WHERE visit_count < 120 and visit_time <= 1788077580

[ Log time: 1788077774.1945 ] [ Expend time: 0.00075697898864746 ] SELECT SUM(visit_count) AS `n0` FROM `z_ip` WHERE ((ip = '216.73.217') AND is_delete = 0)

[ Log time: 1788077774.2142 ] [ Expend time: 0.0012500286102295 ] SELECT `z_service`.* FROM `z_service` WHERE (name = 'xcx') LIMIT 1

[ Log time: 1788077774.2177 ] [ Expend time: 0.0012340545654297 ] SELECT `z_service_article`.* FROM `z_service_article` WHERE (no = 'c5d33566e89bce6b') LIMIT 1

[ Log time: 1788077774.22 ] [ Expend time: 0.0012309551239014 ] SELECT `z_service_article_extra`.* FROM `z_service_article_extra` WHERE (is_delete = 0 AND article_id IN(21401))

[ Log time: 1788077774.2385 ] [ Expend time: 0.0020489692687988 ] UPDATE z_service_article SET view_count = view_count + 1 WHERE id = 21401

[ Log time: 1788077774.2437 ] [ Expend time: 0.0014438629150391 ] SELECT `z_service_article_attachment`.* FROM `z_service_article_attachment` WHERE (article_id = 21401 AND is_delete = 0) ORDER BY `id` DESC

[ Log time: 1788077774.246 ] [ Expend time: 0.0010318756103516 ] SELECT `z_service`.* FROM `z_service` WHERE (id = 2) LIMIT 1

[ Log time: 1788077774.299 ] [ Expend time: 0.052811861038208 ] SELECT `z_service_article`.* FROM `z_service_article` WHERE (is_delete = 0 AND (service_id = 2 AND is_enable = 1 AND publish_time <= 1788077774)) ORDER BY RAND() ASC LIMIT 8

[ Log time: 1788077774.3562 ] [ Expend time: 0.027508020401001 ] SELECT city_id, COUNT(*) AS count FROM z_service_article WHERE is_delete = 0 AND is_enable = 1 GROUP BY city_id ORDER BY count DESC

Database [data master]

[ Log time: 1788077774.3642 ] [ Expend time: 0.0020389556884766 ] Connect DB

[ Log time: 1788077774.3658 ] [ Expend time: 0.0013060569763184 ] SELECT `z_location`.* FROM `z_location` WHERE (is_delete = 0 AND (is_delete = 0 AND id IN(0))) ORDER BY `id` ASC

Escape time: 0.26434397697449, 0 queries, PHP Memory usage: 5806.28125 KB, Server time: 2026-08-30 16:16:14