UITableViewDataSource UITableViewDataSource Class

Definition

The data source for a UITableView. Xamarin.iOS developers should prefer to use UITableViewSource instead of this class.

[Foundation.Protocol]
[Foundation.Register("Xamarin_iOS__UIKit_UITableViewDataSource", false)]
public abstract class UITableViewDataSource : Foundation.NSObject, IDisposable, UIKit.IUITableViewDataSource
type UITableViewDataSource = class
    inherit NSObject
    interface IUITableViewDataSource
    interface INativeObject
    interface IDisposable
Inheritance
UITableViewDataSourceUITableViewDataSource
Attributes
Implements

Remarks

Implementing UITableView often requires subclasses of both UITableViewDataSource and UITableViewDelegate to provide data and behavior for the table view. Xamarin.iOS provides a single class - UITableViewSource - so that only one class needs to be implemented.

The UITableViewDataSource class methods provide a table view with all the information it requires to display its data - such as informing it of the number of sections and rows, and what cell view to use for each row.

The universally-important function of UITableViewDataSource is to provide individual UITableViewCells in response to calls to GetCell(UITableView, NSIndexPath). That call takes as arguments the UITableView in question and an NSIndexPath. That NSIndexPath is based, in turn, on calls to NumberOfSections(UITableView) and RowsInSection(UITableView, nint), so the application developer must, at a minimum, override these three functions. (The UITableView additionally calls GetHeightForRow(UITableView, NSIndexPath) and other layout-related methods for header and footer views and the application developer must override these as appropriate.)

Static tables may return references to pre-allocated UITableViewCells from calls to GetCell(UITableView, NSIndexPath). Dynamic tables should use the UITableView's built-in cell reuse cache by calling DequeueReusableCell(String, NSIndexPath). In iOS 6 and later, application developers should use RegisterClassForCellReuse(Type, String) or RegisterNibForCellReuse(UINib, String) during initialization, in which case DequeueReusableCell(String, NSIndexPath) will instantiate new UITableViewCells as necessary. If application developers are targeting earlier iOS versions, their override of GetCell(UITableView, NSIndexPath) must check for an null return from DequeueReusableCell(String, NSIndexPath) and instantiate a UITableViewCell as necessary.

Constructors

UITableViewDataSource() UITableViewDataSource()

Default constructor that initializes a new instance of this class with no parameters.

UITableViewDataSource(IntPtr) UITableViewDataSource(IntPtr)

A constructor used when creating managed representations of unmanaged objects; Called by the runtime.

UITableViewDataSource(NSObjectFlag) UITableViewDataSource(NSObjectFlag)

Constructor to call on derived classes to skip initialization and merely allocate the object.

Methods

AddObserver(NSObject, NSString, NSKeyValueObservingOptions, IntPtr) AddObserver(NSObject, NSString, NSKeyValueObservingOptions, IntPtr)

Registers an object for being observed externally (using NSString keyPath).   Observed changes are dispatched to the observer’s object ObserveValue(NSString, NSObject, NSDictionary, IntPtr) method.

(Inherited from NSObject)
AddObserver(NSObject, String, NSKeyValueObservingOptions, IntPtr) AddObserver(NSObject, String, NSKeyValueObservingOptions, IntPtr)

Registers an object for being observed externally (using string keyPath).   Observed changes are dispatched to the observer’s object ObserveValue(NSString, NSObject, NSDictionary, IntPtr) method.

(Inherited from NSObject)
AddObserver(NSString, NSKeyValueObservingOptions, Action<NSObservedChange>) AddObserver(NSString, NSKeyValueObservingOptions, Action<NSObservedChange>)

Registers an object for being observed externally using an arbitrary method.

(Inherited from NSObject)
AddObserver(String, NSKeyValueObservingOptions, Action<NSObservedChange>) AddObserver(String, NSKeyValueObservingOptions, Action<NSObservedChange>)

Registers an object for being observed externally using an arbitrary method.

(Inherited from NSObject)
AwakeFromNib() AwakeFromNib()

Called after the object has been loaded from the nib file. Overriders must call base.AwakeFromNib().

(Inherited from NSObject)
BeginInvokeOnMainThread(Action) BeginInvokeOnMainThread(Action) Inherited from NSObject
BeginInvokeOnMainThread(Selector, NSObject) BeginInvokeOnMainThread(Selector, NSObject)

Invokes asynchrously the specified code on the main UI thread.

(Inherited from NSObject)
Bind(NSString, NSObject, String, NSDictionary) Bind(NSString, NSObject, String, NSDictionary) Inherited from NSObject
Bind(String, NSObject, String, NSDictionary) Bind(String, NSObject, String, NSDictionary) Inherited from NSObject
BindingInfo(String) BindingInfo(String) Inherited from NSObject
BindingOptionDescriptions(String) BindingOptionDescriptions(String) Inherited from NSObject
BindingValueClass(String) BindingValueClass(String) Inherited from NSObject
CanEditRow(UITableView, NSIndexPath) CanEditRow(UITableView, NSIndexPath)

Whether the row located at indexPath should be editable.

CanMoveRow(UITableView, NSIndexPath) CanMoveRow(UITableView, NSIndexPath)

Whether the row located at indexPath can be moved to another location in the table view.

CommitEditing() CommitEditing() Inherited from NSObject
CommitEditing(NSObject, Selector, IntPtr) CommitEditing(NSObject, Selector, IntPtr) Inherited from NSObject
CommitEditingStyle(UITableView, UITableViewCellEditingStyle, NSIndexPath) CommitEditingStyle(UITableView, UITableViewCellEditingStyle, NSIndexPath)

Commits the insertion or deletion of the specified row.

ConformsToProtocol(IntPtr) ConformsToProtocol(IntPtr)

Invoked to determine if this object implements the specified protocol.

(Inherited from NSObject)
Copy() Copy()

Performs a copy of the underlying Objective-C object.

(Inherited from NSObject)
DangerousAutorelease() DangerousAutorelease() Inherited from NSObject
DangerousRelease() DangerousRelease() Inherited from NSObject
DangerousRetain() DangerousRetain() Inherited from NSObject
DidChange(NSKeyValueChange, NSIndexSet, NSString) DidChange(NSKeyValueChange, NSIndexSet, NSString)

Indicates a change occurred to the indexes for a to-many relationship.

(Inherited from NSObject)
DidChange(NSString, NSKeyValueSetMutationKind, NSSet) DidChange(NSString, NSKeyValueSetMutationKind, NSSet) Inherited from NSObject
DidChangeValue(String) DidChangeValue(String)

Indicates that a change occurred on the specified key.

(Inherited from NSObject)
Dispose() Dispose()

Releases the resources used by the NSObject object.

(Inherited from NSObject)
Dispose(Boolean) Dispose(Boolean)

Releases the resources used by the NSObject object.

(Inherited from NSObject)
DoesNotRecognizeSelector(Selector) DoesNotRecognizeSelector(Selector)

Indicates that this object does not recognize the specified selector.

(Inherited from NSObject)
Equals(NSObject) Equals(NSObject) Inherited from NSObject
Equals(Object) Equals(Object) Inherited from NSObject
ExposedBindings() ExposedBindings() Inherited from NSObject
GetBindingInfo(NSString) GetBindingInfo(NSString) Inherited from NSObject
GetBindingOptionDescriptions(NSString) GetBindingOptionDescriptions(NSString) Inherited from NSObject
GetBindingValueClass(NSString) GetBindingValueClass(NSString) Inherited from NSObject
GetCell(UITableView, NSIndexPath) GetCell(UITableView, NSIndexPath)

Called by the table view to get populate the row at indexPath with a cell view.

GetDictionaryOfValuesFromKeys(NSString[]) GetDictionaryOfValuesFromKeys(NSString[])

Retrieves the values of the specified keys.

(Inherited from NSObject)
GetHashCode() GetHashCode()

Generates a hash code for the current instance.

(Inherited from NSObject)
GetMethodForSelector(Selector) GetMethodForSelector(Selector) Inherited from NSObject
GetNativeField(String) GetNativeField(String) Inherited from NSObject
GetNativeHash() GetNativeHash() Inherited from NSObject
Init() Init() Inherited from NSObject
InitializeHandle(IntPtr) InitializeHandle(IntPtr) Inherited from NSObject
InitializeHandle(IntPtr, String) InitializeHandle(IntPtr, String) Inherited from NSObject
Invoke(Action, Double) Invoke(Action, Double) Inherited from NSObject
Invoke(Action, TimeSpan) Invoke(Action, TimeSpan) Inherited from NSObject
InvokeOnMainThread(Action) InvokeOnMainThread(Action) Inherited from NSObject
InvokeOnMainThread(Selector, NSObject) InvokeOnMainThread(Selector, NSObject)

Invokes synchrously the specified code on the main UI thread.

(Inherited from NSObject)
IsEqual(NSObject) IsEqual(NSObject) Inherited from NSObject
IsKindOfClass(Class) IsKindOfClass(Class) Inherited from NSObject
IsMemberOfClass(Class) IsMemberOfClass(Class) Inherited from NSObject
MarkDirty() MarkDirty()

Promotes a regular peer object (IsDirectBinding is true) into a toggleref object.

(Inherited from NSObject)
MoveRow(UITableView, NSIndexPath, NSIndexPath) MoveRow(UITableView, NSIndexPath, NSIndexPath)

Called when a row has been moved so that the data source can 'implement' the changed row position that has been performed in the user interface. This ensures the data is kept in-sync with what is being displayed.

MutableCopy() MutableCopy()

Creates a mutable copy of the specified NSObject.

(Inherited from NSObject)
NumberOfSections(UITableView) NumberOfSections(UITableView)

Returns the number of sections that are required to display the data.

ObjectDidEndEditing(NSObject) ObjectDidEndEditing(NSObject) Inherited from NSObject
ObserveValue(NSString, NSObject, NSDictionary, IntPtr) ObserveValue(NSString, NSObject, NSDictionary, IntPtr)

Indicates that the value at the specified keyPath relative to this object has changed.

(Inherited from NSObject)
PerformSelector(Selector) PerformSelector(Selector) Inherited from NSObject
PerformSelector(Selector, NSObject) PerformSelector(Selector, NSObject) Inherited from NSObject
PerformSelector(Selector, NSObject, Double) PerformSelector(Selector, NSObject, Double)

Invokes the selector on the current instance and if the obj is not null, it passes this as its single parameter.

(Inherited from NSObject)
PerformSelector(Selector, NSObject, Double, NSString[]) PerformSelector(Selector, NSObject, Double, NSString[]) Inherited from NSObject
PerformSelector(Selector, NSObject, NSObject) PerformSelector(Selector, NSObject, NSObject) Inherited from NSObject
PerformSelector(Selector, NSThread, NSObject, Boolean) PerformSelector(Selector, NSThread, NSObject, Boolean) Inherited from NSObject
PerformSelector(Selector, NSThread, NSObject, Boolean, NSString[]) PerformSelector(Selector, NSThread, NSObject, Boolean, NSString[]) Inherited from NSObject
PrepareForInterfaceBuilder() PrepareForInterfaceBuilder() Inherited from NSObject
RemoveObserver(NSObject, NSString) RemoveObserver(NSObject, NSString)

Stops the specified observer from receiving further notifications of changed values for the specified keyPath.

(Inherited from NSObject)
RemoveObserver(NSObject, NSString, IntPtr) RemoveObserver(NSObject, NSString, IntPtr)

Stops the specified observer from receiving further notifications of changed values for the specified keyPath and context.

(Inherited from NSObject)
RemoveObserver(NSObject, String) RemoveObserver(NSObject, String)

Stops the specified observer from receiving further notifications of changed values for the specified keyPath.

(Inherited from NSObject)
RemoveObserver(NSObject, String, IntPtr) RemoveObserver(NSObject, String, IntPtr)

Stops the specified observer from receiving further notifications of changed values for the specified keyPath and context.

(Inherited from NSObject)
RespondsToSelector(Selector) RespondsToSelector(Selector)

Whether this object recognizes the specified selector.

(Inherited from NSObject)
RowsInSection(UITableView, nint) RowsInSection(UITableView, nint)

Called by the table view to find out how many rows are to be rendered in the section specified by section.

SectionFor(UITableView, String, nint) SectionFor(UITableView, String, nint)

Returns the index of the section with the given tableView and atIndex.

SectionIndexTitles(UITableView) SectionIndexTitles(UITableView)

Returns an array of titles to be displayed as an index on the table view.

SetNativeField(String, NSObject) SetNativeField(String, NSObject) Inherited from NSObject
SetNilValueForKey(NSString) SetNilValueForKey(NSString)

Sets the value of the specified key to null.

(Inherited from NSObject)
SetValueForKey(NSObject, NSString) SetValueForKey(NSObject, NSString)

Sets the value of the property specified by the key to the specified value.

(Inherited from NSObject)
SetValueForKeyPath(IntPtr, NSString) SetValueForKeyPath(IntPtr, NSString)

A constructor used when creating managed representations of unmanaged objects; Called by the runtime.

(Inherited from NSObject)
SetValueForKeyPath(NSObject, NSString) SetValueForKeyPath(NSObject, NSString)

Sets the value of a property that can be reached using a keypath.

(Inherited from NSObject)
SetValueForUndefinedKey(NSObject, NSString) SetValueForUndefinedKey(NSObject, NSString)

Indicates an attempt to write a value to an undefined key. If not overridden, raises an NSUndefinedKeyException.

(Inherited from NSObject)
SetValuesForKeysWithDictionary(NSDictionary) SetValuesForKeysWithDictionary(NSDictionary)

Sets the values of this NSObject to those in the specified dictionary.

(Inherited from NSObject)
TitleForFooter(UITableView, nint) TitleForFooter(UITableView, nint)

Called to populate the footer for the specified section.

TitleForHeader(UITableView, nint) TitleForHeader(UITableView, nint)

Called to populate the header for the specified section.

ToString() ToString()

Returns a string representation of the value of the current instance.

(Inherited from NSObject)
Unbind(NSString) Unbind(NSString) Inherited from NSObject
Unbind(String) Unbind(String) Inherited from NSObject
ValueForKey(NSString) ValueForKey(NSString)

Returns the value of the property associated with the specified key.

(Inherited from NSObject)
ValueForKeyPath(NSString) ValueForKeyPath(NSString)

Returns the value of a property that can be reached using a keypath.

(Inherited from NSObject)
ValueForUndefinedKey(NSString) ValueForUndefinedKey(NSString)

Indicates an attempt to read a value of an undefined key. If not overridden, raises an NSUndefinedKeyException.

(Inherited from NSObject)
WillChange(NSKeyValueChange, NSIndexSet, NSString) WillChange(NSKeyValueChange, NSIndexSet, NSString)

Indicates that the values of the specified indices in the specified key are about to change.

(Inherited from NSObject)
WillChange(NSString, NSKeyValueSetMutationKind, NSSet) WillChange(NSString, NSKeyValueSetMutationKind, NSSet) Inherited from NSObject
WillChangeValue(String) WillChangeValue(String)

Indicates that the value of the specified key is about to change.

(Inherited from NSObject)

Properties

Class Class Inherited from NSObject
ClassHandle ClassHandle

The handle for this class.

(Inherited from NSObject)
DebugDescription DebugDescription

A developer-meaningful description of this object.

(Inherited from NSObject)
Description Description

Description of the object, the Objective-C version of ToString.

(Inherited from NSObject)
Handle Handle

Handle (pointer) to the unmanaged object representation.

(Inherited from NSObject)
IsDirectBinding IsDirectBinding Inherited from NSObject
IsProxy IsProxy Inherited from NSObject
RetainCount RetainCount

Returns the current Objective-C retain count for the object.

(Inherited from NSObject)
Self Self Inherited from NSObject
Superclass Superclass Inherited from NSObject
SuperHandle SuperHandle

Handle used to represent the methods in the base class for this NSObject.

(Inherited from NSObject)
Zone Zone Inherited from NSObject

Extension Methods

GetDebugDescription(INSObjectProtocol) GetDebugDescription(INSObjectProtocol)
GetAccessibilityCustomRotors(NSObject) GetAccessibilityCustomRotors(NSObject)

Gets the array of UIAccessibilityCustomRotor objects appropriate for this object.

SetAccessibilityCustomRotors(NSObject, UIAccessibilityCustomRotor[]) SetAccessibilityCustomRotors(NSObject, UIAccessibilityCustomRotor[])

Sets the array of UIAccessibilityCustomRotor objects appropriate for this object.

CanEditRow(IUITableViewDataSource, UITableView, NSIndexPath) CanEditRow(IUITableViewDataSource, UITableView, NSIndexPath)

Whether the row located at should be editable.

CanMoveRow(IUITableViewDataSource, UITableView, NSIndexPath) CanMoveRow(IUITableViewDataSource, UITableView, NSIndexPath)

Whether the row located at can be moved to another location in the table view.

CommitEditingStyle(IUITableViewDataSource, UITableView, UITableViewCellEditingStyle, NSIndexPath) CommitEditingStyle(IUITableViewDataSource, UITableView, UITableViewCellEditingStyle, NSIndexPath)

Commits the insertion or deletion of the specified row.

MoveRow(IUITableViewDataSource, UITableView, NSIndexPath, NSIndexPath) MoveRow(IUITableViewDataSource, UITableView, NSIndexPath, NSIndexPath)

Called when a row has been moved so that the data source can 'implement' the changed row position that has been performed in the user interface. This ensures the data is kept in-sync with what is being displayed.

NumberOfSections(IUITableViewDataSource, UITableView) NumberOfSections(IUITableViewDataSource, UITableView)

Returns the number of sections that are required to display the data.

SectionFor(IUITableViewDataSource, UITableView, String, nint) SectionFor(IUITableViewDataSource, UITableView, String, nint)

Returns the index of the section with the given and .

SectionIndexTitles(IUITableViewDataSource, UITableView) SectionIndexTitles(IUITableViewDataSource, UITableView)

Returns an array of titles to be displayed as an index on the table view.

TitleForFooter(IUITableViewDataSource, UITableView, nint) TitleForFooter(IUITableViewDataSource, UITableView, nint)

Called to populate the footer for the specified section.

TitleForHeader(IUITableViewDataSource, UITableView, nint) TitleForHeader(IUITableViewDataSource, UITableView, nint)

Called to populate the header for the specified section.

Applies to

See also