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Flutter 之A value of type ‘‘ can‘t be assigned to a variable of type的错误解决笔记

郭梧悠发布时间：2021-09-10 15:02:34 ，浏览量：4

最近工作不是很忙，于是乎又是捡起Flutter继续学习。在github上找到一个flutter的学习demo，准备学习学习其动画。运行github上的代码发下了如下错误：

Error: A value of type 'Animation' can't be assigned to a variable of type 
'Animation' because 'BorderRadius


    
        
            
                
                
                    郭梧悠
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	请求信息 : 2025-08-09 07:12:12 HTTP/2.0 GET : /home/article/detail/id/418851.html
运行时间 : 0.0551s ( Load:0.0118s Init:0.0016s Exec:0.0263s Template:0.0155s )
吞吐率 : 18.15req/s
内存开销 : 1,924.16 kb
查询信息 : 18 queries 0 writes 
文件加载 : 36
缓存信息 : 5 gets 0 writes 
配置加载 : 132
会话信息 : SESSION_ID=meu2ar6m270bobdumu18cagdjt
    
    
        
    
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	[ app_init ] --START--
Run Behavior\BuildLiteBehavior [ RunTime:0.000015s ]
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[ app_begin ] --START--
Run Behavior\ReadHtmlCacheBehavior [ RunTime:0.000493s ]
[ app_begin ] --END-- [ RunTime:0.000539s ]
[ view_parse ] --START--
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Run Behavior\ContentReplaceBehavior [ RunTime:0.000074s ]
[ template_filter ] --END-- [ RunTime:0.000122s ]
Run Behavior\ParseTemplateBehavior [ RunTime:0.010833s ]
[ view_parse ] --END-- [ RunTime:0.010894s ]
[ view_filter ] --START--
Run Behavior\WriteHtmlCacheBehavior [ RunTime:0.000576s ]
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[ app_end ] --START--
    
    
        
    
	[2] session_save_path(): open_basedir restriction in effect. File(/var/lib/php/session) is not within the allowed path(s): (/www/wwwroot/www.chaojiit.com/:/tmp/) /www/wwwroot/www.chaojiit.com/ThinkPHP/Common/functions.php 第 1239 行.
[8192] Array and string offset access syntax with curly braces is deprecated /www/wwwroot/www.chaojiit.com/ThinkPHP/Library/Think/Cache/Driver/File.class.php 第 59 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 37 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 98 行.
[8] Trying to access array offset on value of type null /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 98 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 99 行.
[8] Trying to access array offset on value of type null /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 99 行.
[8] Undefined variable: pinglun_list /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 108 行.
    
    
        
    
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SHOW COLUMNS FROM `bloger` [ RunTime:0.0009s ]
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SELECT COUNT(*) AS tp_count FROM `article` WHERE `bloger_id` = 714 LIMIT 1   [ RunTime:0.0001s ]
SHOW COLUMNS FROM `article_content` [ RunTime:0.0004s ]
SELECT `content` FROM `article_content` WHERE `article_id` = 418851 LIMIT 1   [ RunTime:0.0011s ]
SHOW COLUMNS FROM `article_cate` [ RunTime:0.0009s ]
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SELECT * FROM `article` WHERE `bloger_id` = 714 ORDER BY view_count desc LIMIT 0,10   [ RunTime:0.0002s ]
    
    
        
    
	    
    
    



0.0551s