#[repr(C)]pub struct UIMenuElement { /* private fields */ }
UIMenuElement
only.Expand description
Implementations§
impl UIMenuElement
UIAccessibility.
Source§impl UIMenuElement
impl UIMenuElement
Sourcepub unsafe fn setSubtitle(&self, subtitle: Option<&NSString>)
pub unsafe fn setSubtitle(&self, subtitle: Option<&NSString>)
Setter for subtitle
.
Sourcepub unsafe fn image(&self) -> Option<Retained<UIImage>>
Available on crate feature UIImage
only.
pub unsafe fn image(&self) -> Option<Retained<UIImage>>
UIImage
only.Image to be displayed alongside the element’s title.
pub unsafe fn initWithCoder( this: Allocated<Self>, coder: &NSCoder, ) -> Option<Retained<Self>>
pub unsafe fn init(this: Allocated<Self>) -> Retained<Self>
pub unsafe fn new(mtm: MainThreadMarker) -> Retained<Self>
Methods from Deref<Target = NSObject>§
Sourcepub fn doesNotRecognizeSelector(&self, sel: Sel) -> !
pub fn doesNotRecognizeSelector(&self, sel: Sel) -> !
Handle messages the object doesn’t recognize.
See Apple’s documentation for details.
Methods from Deref<Target = AnyObject>§
Sourcepub fn class(&self) -> &'static AnyClass
Available on crate feature UIIndirectScribbleInteraction
only.
pub fn class(&self) -> &'static AnyClass
UIIndirectScribbleInteraction
only.Dynamically find the class of this object.
§Panics
May panic if the object is invalid (which may be the case for objects
returned from unavailable init
/new
methods).
§Example
Check that an instance of NSObject
has the precise class NSObject
.
use objc2::ClassType;
use objc2::runtime::NSObject;
let obj = NSObject::new();
assert_eq!(obj.class(), NSObject::class());
Sourcepub unsafe fn get_ivar<T>(&self, name: &str) -> &Twhere
T: Encode,
👎Deprecated: this is difficult to use correctly, use Ivar::load
instead.Available on crate feature UIIndirectScribbleInteraction
only.
pub unsafe fn get_ivar<T>(&self, name: &str) -> &Twhere
T: Encode,
Ivar::load
instead.UIIndirectScribbleInteraction
only.Use Ivar::load
instead.
§Safety
The object must have an instance variable with the given name, and it
must be of type T
.
See Ivar::load_ptr
for details surrounding this.
Sourcepub fn downcast_ref<T>(&self) -> Option<&T>where
T: DowncastTarget,
Available on crate feature UIIndirectScribbleInteraction
only.
pub fn downcast_ref<T>(&self) -> Option<&T>where
T: DowncastTarget,
UIIndirectScribbleInteraction
only.Attempt to downcast the object to a class of type T
.
This is the reference-variant. Use Retained::downcast
if you want
to convert a retained object to another type.
§Mutable classes
Some classes have immutable and mutable variants, such as NSString
and NSMutableString
.
When some Objective-C API signature says it gives you an immutable class, it generally expects you to not mutate that, even though it may technically be mutable “under the hood”.
So using this method to convert a NSString
to a NSMutableString
,
while not unsound, is generally frowned upon unless you created the
string yourself, or the API explicitly documents the string to be
mutable.
See Apple’s documentation on mutability and on
isKindOfClass:
for more details.
§Generic classes
Objective-C generics are called “lightweight generics”, and that’s because they aren’t exposed in the runtime. This makes it impossible to safely downcast to generic collections, so this is disallowed by this method.
You can, however, safely downcast to generic collections where all the
type-parameters are AnyObject
.
§Panics
This works internally by calling isKindOfClass:
. That means that the
object must have the instance method of that name, and an exception
will be thrown (if CoreFoundation is linked) or the process will abort
if that is not the case. In the vast majority of cases, you don’t need
to worry about this, since both root objects NSObject
and
NSProxy
implement this method.
§Examples
Cast an NSString
back and forth from NSObject
.
use objc2::rc::Retained;
use objc2_foundation::{NSObject, NSString};
let obj: Retained<NSObject> = NSString::new().into_super();
let string = obj.downcast_ref::<NSString>().unwrap();
// Or with `downcast`, if we do not need the object afterwards
let string = obj.downcast::<NSString>().unwrap();
Try (and fail) to cast an NSObject
to an NSString
.
use objc2_foundation::{NSObject, NSString};
let obj = NSObject::new();
assert!(obj.downcast_ref::<NSString>().is_none());
Try to cast to an array of strings.
use objc2_foundation::{NSArray, NSObject, NSString};
let arr = NSArray::from_retained_slice(&[NSObject::new()]);
// This is invalid and doesn't type check.
let arr = arr.downcast_ref::<NSArray<NSString>>();
This fails to compile, since it would require enumerating over the array to ensure that each element is of the desired type, which is a performance pitfall.
Downcast when processing each element instead.
use objc2_foundation::{NSArray, NSObject, NSString};
let arr = NSArray::from_retained_slice(&[NSObject::new()]);
for elem in arr {
if let Some(data) = elem.downcast_ref::<NSString>() {
// handle `data`
}
}
Trait Implementations§
Source§impl AsRef<AnyObject> for UIMenuElement
impl AsRef<AnyObject> for UIMenuElement
Source§impl AsRef<NSObject> for UIMenuElement
impl AsRef<NSObject> for UIMenuElement
Source§impl AsRef<UIMenuElement> for UIAction
Available on crate feature UIAction
only.
impl AsRef<UIMenuElement> for UIAction
UIAction
only.Source§fn as_ref(&self) -> &UIMenuElement
fn as_ref(&self) -> &UIMenuElement
Source§impl AsRef<UIMenuElement> for UICommand
Available on crate feature UICommand
only.
impl AsRef<UIMenuElement> for UICommand
UICommand
only.Source§fn as_ref(&self) -> &UIMenuElement
fn as_ref(&self) -> &UIMenuElement
Source§impl AsRef<UIMenuElement> for UIDeferredMenuElement
Available on crate feature UIDeferredMenuElement
only.
impl AsRef<UIMenuElement> for UIDeferredMenuElement
UIDeferredMenuElement
only.Source§fn as_ref(&self) -> &UIMenuElement
fn as_ref(&self) -> &UIMenuElement
Source§impl AsRef<UIMenuElement> for UIKeyCommand
Available on crate features UICommand
and UIKeyCommand
only.
impl AsRef<UIMenuElement> for UIKeyCommand
UICommand
and UIKeyCommand
only.Source§fn as_ref(&self) -> &UIMenuElement
fn as_ref(&self) -> &UIMenuElement
Source§impl AsRef<UIMenuElement> for UIMenu
Available on crate feature UIMenu
only.
impl AsRef<UIMenuElement> for UIMenu
UIMenu
only.Source§fn as_ref(&self) -> &UIMenuElement
fn as_ref(&self) -> &UIMenuElement
Source§impl AsRef<UIMenuElement> for UIMenuElement
impl AsRef<UIMenuElement> for UIMenuElement
Source§impl AsRef<UIMenuElement> for UIWindowSceneActivationAction
Available on crate features UIAction
and UIWindowSceneActivationAction
only.
impl AsRef<UIMenuElement> for UIWindowSceneActivationAction
UIAction
and UIWindowSceneActivationAction
only.Source§fn as_ref(&self) -> &UIMenuElement
fn as_ref(&self) -> &UIMenuElement
Source§impl Borrow<AnyObject> for UIMenuElement
impl Borrow<AnyObject> for UIMenuElement
Source§impl Borrow<NSObject> for UIMenuElement
impl Borrow<NSObject> for UIMenuElement
Source§impl Borrow<UIMenuElement> for UIAction
Available on crate feature UIAction
only.
impl Borrow<UIMenuElement> for UIAction
UIAction
only.Source§fn borrow(&self) -> &UIMenuElement
fn borrow(&self) -> &UIMenuElement
Source§impl Borrow<UIMenuElement> for UICommand
Available on crate feature UICommand
only.
impl Borrow<UIMenuElement> for UICommand
UICommand
only.Source§fn borrow(&self) -> &UIMenuElement
fn borrow(&self) -> &UIMenuElement
Source§impl Borrow<UIMenuElement> for UIDeferredMenuElement
Available on crate feature UIDeferredMenuElement
only.
impl Borrow<UIMenuElement> for UIDeferredMenuElement
UIDeferredMenuElement
only.Source§fn borrow(&self) -> &UIMenuElement
fn borrow(&self) -> &UIMenuElement
Source§impl Borrow<UIMenuElement> for UIKeyCommand
Available on crate features UICommand
and UIKeyCommand
only.
impl Borrow<UIMenuElement> for UIKeyCommand
UICommand
and UIKeyCommand
only.Source§fn borrow(&self) -> &UIMenuElement
fn borrow(&self) -> &UIMenuElement
Source§impl Borrow<UIMenuElement> for UIMenu
Available on crate feature UIMenu
only.
impl Borrow<UIMenuElement> for UIMenu
UIMenu
only.Source§fn borrow(&self) -> &UIMenuElement
fn borrow(&self) -> &UIMenuElement
Source§impl Borrow<UIMenuElement> for UIWindowSceneActivationAction
Available on crate features UIAction
and UIWindowSceneActivationAction
only.
impl Borrow<UIMenuElement> for UIWindowSceneActivationAction
UIAction
and UIWindowSceneActivationAction
only.Source§fn borrow(&self) -> &UIMenuElement
fn borrow(&self) -> &UIMenuElement
Source§impl ClassType for UIMenuElement
impl ClassType for UIMenuElement
Source§const NAME: &'static str = "UIMenuElement"
const NAME: &'static str = "UIMenuElement"
Source§type ThreadKind = dyn MainThreadOnly
type ThreadKind = dyn MainThreadOnly
Source§impl CopyingHelper for UIMenuElement
impl CopyingHelper for UIMenuElement
Source§type Result = UIMenuElement
type Result = UIMenuElement
Self
if the type has no
immutable counterpart. Read moreSource§impl Debug for UIMenuElement
impl Debug for UIMenuElement
Source§impl Deref for UIMenuElement
impl Deref for UIMenuElement
Source§impl Hash for UIMenuElement
impl Hash for UIMenuElement
Source§impl Message for UIMenuElement
impl Message for UIMenuElement
Source§impl NSCoding for UIMenuElement
impl NSCoding for UIMenuElement
Source§impl NSCopying for UIMenuElement
impl NSCopying for UIMenuElement
Source§impl NSObjectProtocol for UIMenuElement
impl NSObjectProtocol for UIMenuElement
Source§fn isEqual(&self, other: Option<&AnyObject>) -> bool
fn isEqual(&self, other: Option<&AnyObject>) -> bool
Source§fn hash(&self) -> usize
fn hash(&self) -> usize
Source§fn isKindOfClass(&self, cls: &AnyClass) -> bool
fn isKindOfClass(&self, cls: &AnyClass) -> bool
Source§fn is_kind_of<T>(&self) -> bool
fn is_kind_of<T>(&self) -> bool
isKindOfClass
directly, or cast your objects with AnyObject::downcast_ref
Source§fn isMemberOfClass(&self, cls: &AnyClass) -> bool
fn isMemberOfClass(&self, cls: &AnyClass) -> bool
Source§fn respondsToSelector(&self, aSelector: Sel) -> bool
fn respondsToSelector(&self, aSelector: Sel) -> bool
Source§fn conformsToProtocol(&self, aProtocol: &AnyProtocol) -> bool
fn conformsToProtocol(&self, aProtocol: &AnyProtocol) -> bool
Source§fn debugDescription(&self) -> Retained<NSObject>
fn debugDescription(&self) -> Retained<NSObject>
Source§impl NSSecureCoding for UIMenuElement
impl NSSecureCoding for UIMenuElement
Source§impl PartialEq for UIMenuElement
impl PartialEq for UIMenuElement
Source§impl RefEncode for UIMenuElement
impl RefEncode for UIMenuElement
Source§const ENCODING_REF: Encoding = <NSObject as ::objc2::RefEncode>::ENCODING_REF
const ENCODING_REF: Encoding = <NSObject as ::objc2::RefEncode>::ENCODING_REF
Source§impl UIAccessibilityIdentification for UIMenuElement
Available on crate feature UIAccessibilityIdentification
only.
impl UIAccessibilityIdentification for UIMenuElement
UIAccessibilityIdentification
only.impl DowncastTarget for UIMenuElement
impl Eq for UIMenuElement
Auto Trait Implementations§
impl !Freeze for UIMenuElement
impl !RefUnwindSafe for UIMenuElement
impl !Send for UIMenuElement
impl !Sync for UIMenuElement
impl !Unpin for UIMenuElement
impl !UnwindSafe for UIMenuElement
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Source§impl<'a, T> MainThreadOnly for T
impl<'a, T> MainThreadOnly for T
Source§fn mtm(&self) -> MainThreadMarker
fn mtm(&self) -> MainThreadMarker
MainThreadMarker
from the main-thread-only object. Read more