【发布时间】:2020-12-19 11:56:10
【问题描述】:
我对 Flutter / Dart 还是有点陌生 我从 php json 文件中恢复数据,但它在颤振中显示错误。
E/flutter ( 7160): [ERROR:flutter/lib/ui/ui_dart_state.cc(166)] Unhandled Exception:
NoSuchMethodError: Class '_InternalLinkedHashMap<String, dynamic>' has no instance method 'cast' with
matching arguments.
E/flutter ( 7160): Receiver: _LinkedHashMap len:1
E/flutter ( 7160): Tried calling: cast<Map<String, dynamic>>()
E/flutter ( 7160): Found: cast<RK, RV>() => Map<RK, RV>
E/flutter ( 7160): #0 Object.noSuchMethod (dart:core-patch/object_patch.dart:51:5)
【问题讨论】:
-
检查堆栈跟踪并找出导致问题的行并发布。
-
这一行的错误:final items = json.decode(response.body).cast
标签: android-studio flutter dart