QQmlNdefRecord

Qt 5.9.0 Reference Documentation

QQmlNdefRecord Class

The QQmlNdefRecord class implements the NdefRecord type in QML. 更多...

头文件:	#include <QQmlNdefRecord>
qmake:	QT += nfc
开始支持版本:	Qt 5.2
Instantiated By:	NdefRecord
基类:	QObject

所有的成员列表, 包括继承的成员

公有类型

enum	TypeNameFormat { Empty, NfcRtd, Mime, Uri, ExternalRtd, Unknown }

属性

record : QNdefRecord
type : QString
typeNameFormat : TypeNameFormat

1 个属性继承自 QObject

公有函数

	QQmlNdefRecord(QObject *parent = Q_NULLPTR)
	QQmlNdefRecord(const QNdefRecord &record, QObject *parent = Q_NULLPTR)
	~QQmlNdefRecord()
QNdefRecord	record() const
void	setRecord(const QNdefRecord &record)
void	setType(const QString &newtype)
void	setTypeNameFormat(TypeNameFormat newTypeNameFormat)
QString	type() const
TypeNameFormat	typeNameFormat() const

32 个公有函数继承自 QObject

信号

void	recordChanged()
void	typeChanged()
void	typeNameFormatChanged()

2 个信号继承自 QObject

Macros

Q_DECLARE_NDEFRECORD(className, typeNameFormat, type)

其他继承的成员

1 个公有槽函数继承自 QObject
1 个公有变量继承自 QObject
10 个静态公有成员继承自 QObject
9 个受保护的函数继承自 QObject
2 个受保护的变量继承自 QObject

详细描述

The QQmlNdefRecord class implements the NdefRecord type in QML.

The QQmlNdefRecord class is the base class for all NdefRecord types in QML. To support a new NDEF record type in QML subclass this class and expose new properties, member functions and signals appropriate for the new record type. The following must be done to create a new NDEF record type in QML:

The subclass must have a Q_OBJECT macro in its declaration.
The subclass must have an invokable constructor that takes a QNdefRecord and a QObject pointer.
The subclass must be declared as an NDEF record by expanding the Q_DECLARE_NDEFRECORD() macro in the implementation file of the subclass.
The subclass must be registered with QML.

For example the declaration of such a class may look like the following.


  class QQmlNdefFooRecord : public QQmlNdefRecord
  {
      Q_OBJECT

      Q_PROPERTY(int foo READ foo WRITE setFoo NOTIFY fooChanged)

  public:
      explicit QQmlNdefFooRecord(QObject *parent = 0);
      Q_INVOKABLE QQmlNdefFooRecord(const QNdefRecord &record, QObject *parent = 0);
      ~QQmlNdefFooRecord();

      int foo() const;
      void setFoo(int value);

  signals:
      void fooChanged();
  };

Within the implementation file the Q_DECLARE_NDEFRECORD() macro is expanded:


  Q_DECLARE_NDEFRECORD(QQmlNdefFooRecord, QNdefRecord::ExternalRtd, "com.example:f")

Finially the application or plugin code calls qmlRegisterType():


  qmlRegisterType<QQmlNdefFooRecord>(uri, 1, 0, "NdefFooRecord");

参见 NdefRecord.

成员类型

enum QQmlNdefRecord::TypeNameFormat

This enum describes the type name format of an NDEF record. The values of this enum are according to QNdefRecord::TypeNameFormat

Constant	Value	Description
`QQmlNdefRecord::Empty`	`QNdefRecord::Empty`	An empty NDEF record, the record does not contain a payload.
`QQmlNdefRecord::NfcRtd`	`QNdefRecord::NfcRtd`	The NDEF record type is defined by an NFC RTD Specification.
`QQmlNdefRecord::Mime`	`QNdefRecord::Mime`	The NDEF record type follows the construct described in RFC 2046.
`QQmlNdefRecord::Uri`	`QNdefRecord::Uri`	The NDEF record type follows the construct described in RFC 3986.
`QQmlNdefRecord::ExternalRtd`	`QNdefRecord::ExternalRtd`	The NDEF record type follows the construct for external type names described the NFC RTD Specification.
`QQmlNdefRecord::Unknown`	`QNdefRecord::Unknown`	The NDEF record type is unknown.

属性

record : QNdefRecord

This property hold the NDEF record that this class represents.

访问函数:

QNdefRecord	record() const
void	setRecord(const QNdefRecord &record)

Notifier signal:

void	recordChanged()

type : QString

This property hold the type of the NDEF record.

访问函数:

QString	type() const
void	setType(const QString &newtype)

Notifier signal:

void	typeChanged()

typeNameFormat : TypeNameFormat

This property hold the TNF of the NDEF record.

访问函数:

TypeNameFormat	typeNameFormat() const
void	setTypeNameFormat(TypeNameFormat newTypeNameFormat)

Notifier signal:

void	typeNameFormatChanged()

成员函数

QQmlNdefRecord::QQmlNdefRecord(QObject **parent* = Q_NULLPTR)

Constructs a new empty QQmlNdefRecord with parent.

QQmlNdefRecord::QQmlNdefRecord(const QNdefRecord &record, QObject **parent* = Q_NULLPTR)

Constructs a new QQmlNdefRecord representing record. The parent of the newly constructed object will be set to parent.

QQmlNdefRecord::~QQmlNdefRecord()

Destroys the QQmlNdefRecord instance.

QNdefRecord QQmlNdefRecord::record() const

Returns a copy of the record.

Note: Getter function for property record.

参见 setRecord().

void QQmlNdefRecord::setRecord(const QNdefRecord &record)

Sets the record to record. If the record is set the recordChanged() signal will be emitted.

Note: Setter function for property record.

参见 record().

void QQmlNdefRecord::setType(const QString &newtype)

Sets the record type to newtype if it is not currently equal to type(); otherwise does nothing. If the record type is set the typeChanged() signal will be emitted.

Note: Setter function for property type.

参见 QNdefRecord::setType() and QNdefRecord::type().

void QQmlNdefRecord::setTypeNameFormat(TypeNameFormat newTypeNameFormat)

Sets the type name format of the NDEF record to newTypeNameFormat.

Note: Setter function for property typeNameFormat.

参见 typeNameFormat().

QString QQmlNdefRecord::type() const

Returns the type of the record.

Note: Getter function for property type.

参见 QNdefRecord::setType() and QNdefRecord::type().

`[signal]` void QQmlNdefRecord::typeChanged()

This signal is emitted when the record type changes.

Note: Notifier signal for property type.

TypeNameFormat QQmlNdefRecord::typeNameFormat() const

Returns the type name format of the NDEF record.

Note: Getter function for property typeNameFormat.

参见 setTypeNameFormat().

宏

Q_DECLARE_NDEFRECORD(className, typeNameFormat, type)

This macro ensures that className is declared as the class implementing the NDEF record identified by typeNameFormat and type.

This macro should be expanded in the implementation file for className.

目录

QQmlNdefRecord Class

公有类型

属性

公有函数

信号

Macros

其他继承的成员

详细描述

成员类型

enum QQmlNdefRecord::TypeNameFormat

属性

record : QNdefRecord

type : QString

typeNameFormat : TypeNameFormat

成员函数

QQmlNdefRecord::QQmlNdefRecord(QObject *parent = Q_NULLPTR)

QQmlNdefRecord::QQmlNdefRecord(const QNdefRecord &record, QObject *parent = Q_NULLPTR)

QQmlNdefRecord::~QQmlNdefRecord()

QNdefRecord QQmlNdefRecord::record() const

void QQmlNdefRecord::setRecord(const QNdefRecord &record)

void QQmlNdefRecord::setType(const QString &newtype)

void QQmlNdefRecord::setTypeNameFormat(TypeNameFormat newTypeNameFormat)

QString QQmlNdefRecord::type() const

[signal] void QQmlNdefRecord::typeChanged()

TypeNameFormat QQmlNdefRecord::typeNameFormat() const

宏

Q_DECLARE_NDEFRECORD(className, typeNameFormat, type)

QQmlNdefRecord::QQmlNdefRecord(QObject **parent* = Q_NULLPTR)

QQmlNdefRecord::QQmlNdefRecord(const QNdefRecord &record, QObject **parent* = Q_NULLPTR)

`[signal]` void QQmlNdefRecord::typeChanged()