Flutter数据类型与iOSAndroid对应关系
Dart数据类型与iOS/Android转换关系表
The following table shows how Dart values are received on the platform side and vice versa:
| Dart | Java | Kotlin | Obj-C | Swift |
|---|---|---|---|---|
| null | null | null | nil (NSNull when nested) | nil |
| bool | java.lang.Boolean | Boolean | NSNumber numberWithBool: | NSNumber(value: Bool) |
| int | java.lang.Integer | Int | NSNumber numberWithInt: | NSNumber(value: Int32) |
| int, if 32 bits not enough | java.lang.Long | Long | NSNumber numberWithLong: | NSNumber(value: Int) |
| double | java.lang.Double | Double | NSNumber numberWithDouble: | NSNumber(value: Double) |
| String | java.lang.String | String | NSString | String |
| Uint8List | byte[] | ByteArray | FlutterStandardTypedData typedDataWithBytes: | FlutterStandardTypedData(bytes: Data) |
| Int32List | int[] | IntArray | FlutterStandardTypedData typedDataWithInt32: | FlutterStandardTypedData(int32: Data) |
| Int64List | long[] | LongArray | FlutterStandardTypedData typedDataWithInt64: | FlutterStandardTypedData(int64: Data) |
| Float64List | double[] | DoubleArray | FlutterStandardTypedData typedDataWithFloat64: | FlutterStandardTypedData(float64: Data) |
| List | java.util.ArrayList | List | NSArray | Array |
| Map | java.util.HashMap | HashMap | NSDictionary | Dictionary |
