Struct NSByteCountFormatter

#[repr(C)]
pub struct NSByteCountFormatter { /* private fields */ }

Available on crate features NSByteCountFormatter and NSFormatter only.

Apple’s documentation

Implementations

impl NSByteCountFormatter

pub unsafe fn stringFromByteCount_countStyle( byte_count: c_longlong, count_style: NSByteCountFormatterCountStyle, ) -> Retained<NSString>

Available on crate feature NSString only.

pub unsafe fn stringFromByteCount( &self, byte_count: c_longlong, ) -> Retained<NSString>

Available on crate feature NSString only.

pub unsafe fn stringFromMeasurement_countStyle( measurement: &NSMeasurement<NSUnitInformationStorage>, count_style: NSByteCountFormatterCountStyle, ) -> Retained<NSString>

Available on crate features NSMeasurement and NSString and NSUnit only.

pub unsafe fn stringFromMeasurement( &self, measurement: &NSMeasurement<NSUnitInformationStorage>, ) -> Retained<NSString>

Available on crate features NSMeasurement and NSString and NSUnit only.

pub unsafe fn stringForObjectValue( &self, obj: Option<&AnyObject>, ) -> Option<Retained<NSString>>

Available on crate feature NSString only.

pub unsafe fn allowedUnits(&self) -> NSByteCountFormatterUnits

pub unsafe fn setAllowedUnits(&self, allowed_units: NSByteCountFormatterUnits)

Setter for allowedUnits.

pub unsafe fn countStyle(&self) -> NSByteCountFormatterCountStyle

pub unsafe fn setCountStyle(&self, count_style: NSByteCountFormatterCountStyle)

Setter for countStyle.

pub unsafe fn allowsNonnumericFormatting(&self) -> bool

pub unsafe fn setAllowsNonnumericFormatting( &self, allows_nonnumeric_formatting: bool, )

Setter for allowsNonnumericFormatting.

pub unsafe fn includesUnit(&self) -> bool

pub unsafe fn setIncludesUnit(&self, includes_unit: bool)

Setter for includesUnit.

pub unsafe fn includesCount(&self) -> bool

pub unsafe fn setIncludesCount(&self, includes_count: bool)

Setter for includesCount.

pub unsafe fn includesActualByteCount(&self) -> bool

pub unsafe fn setIncludesActualByteCount( &self, includes_actual_byte_count: bool, )

Setter for includesActualByteCount.

pub unsafe fn isAdaptive(&self) -> bool

pub unsafe fn setAdaptive(&self, adaptive: bool)

Setter for isAdaptive.

pub unsafe fn zeroPadsFractionDigits(&self) -> bool

pub unsafe fn setZeroPadsFractionDigits(&self, zero_pads_fraction_digits: bool)

Setter for zeroPadsFractionDigits.

pub unsafe fn formattingContext(&self) -> NSFormattingContext

pub unsafe fn setFormattingContext( &self, formatting_context: NSFormattingContext, )

Setter for formattingContext.

impl NSByteCountFormatter

Methods declared on superclass NSObject.

pub unsafe fn init(this: Allocated<Self>) -> Retained<Self>

pub unsafe fn new() -> Retained<Self>

Methods from Deref<Target = NSFormatter>

pub unsafe fn stringForObjectValue( &self, obj: Option<&AnyObject>, ) -> Option<Retained<NSString>>

Available on crate feature NSString only.

pub unsafe fn attributedStringForObjectValue_withDefaultAttributes( &self, obj: &AnyObject, attrs: Option<&NSDictionary<NSAttributedStringKey, AnyObject>>, ) -> Option<Retained<NSAttributedString>>

Available on crate features NSAttributedString and NSDictionary and NSString only.

pub unsafe fn editingStringForObjectValue( &self, obj: &AnyObject, ) -> Option<Retained<NSString>>

Available on crate feature NSString only.

pub unsafe fn getObjectValue_forString_errorDescription( &self, obj: Option<&mut Option<Retained<AnyObject>>>, string: &NSString, error: Option<&mut Option<Retained<NSString>>>, ) -> bool

Available on crate feature NSString only.

pub unsafe fn isPartialStringValid_newEditingString_errorDescription( &self, partial_string: &NSString, new_string: Option<&mut Option<Retained<NSString>>>, error: Option<&mut Option<Retained<NSString>>>, ) -> bool

Available on crate feature NSString only.

pub unsafe fn isPartialStringValid_proposedSelectedRange_originalString_originalSelectedRange_errorDescription( &self, partial_string_ptr: &mut Retained<NSString>, proposed_sel_range_ptr: NSRangePointer, orig_string: &NSString, orig_sel_range: NSRange, error: Option<&mut Option<Retained<NSString>>>, ) -> bool

Available on crate features NSRange and NSString only.

Methods from Deref<Target = NSObject>

pub fn doesNotRecognizeSelector(&self, sel: Sel) -> !

Handle messages the object doesn’t recognize.

See Apple’s documentation for details.

Methods from Deref<Target = AnyObject>

pub fn class(&self) -> &'static AnyClass

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());

pub unsafe fn get_ivar<T>(&self, name: &str) -> &T

where T: Encode,

👎Deprecated: this is difficult to use correctly, use Ivar::load instead.

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.

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: DowncastTarget,

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

impl AsRef<AnyObject> for NSByteCountFormatter

fn as_ref(&self) -> &AnyObject

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<NSByteCountFormatter> for NSByteCountFormatter

fn as_ref(&self) -> &Self

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<NSFormatter> for NSByteCountFormatter

fn as_ref(&self) -> &NSFormatter

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<NSObject> for NSByteCountFormatter

fn as_ref(&self) -> &NSObject

Converts this type into a shared reference of the (usually inferred) input type.

impl Borrow<AnyObject> for NSByteCountFormatter

fn borrow(&self) -> &AnyObject

Immutably borrows from an owned value.

impl Borrow<NSFormatter> for NSByteCountFormatter

fn borrow(&self) -> &NSFormatter

Immutably borrows from an owned value.

impl Borrow<NSObject> for NSByteCountFormatter

fn borrow(&self) -> &NSObject

Immutably borrows from an owned value.

impl ClassType for NSByteCountFormatter

const NAME: &'static str = "NSByteCountFormatter"

The name of the Objective-C class that this type represents.

type Super = NSFormatter

The superclass of this class.

type ThreadKind = <<NSByteCountFormatter as ClassType>::Super as ClassType>::ThreadKind

Whether the type can be used from any thread, or from only the main thread.

fn class() -> &'static AnyClass

Get a reference to the Objective-C class that this type represents.

fn as_super(&self) -> &Self::Super

Get an immutable reference to the superclass.

impl CopyingHelper for NSByteCountFormatter

Available on crate feature NSObject only.

type Result = NSByteCountFormatter

The immutable counterpart of the type, or Self if the type has no immutable counterpart.

impl Debug for NSByteCountFormatter

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Deref for NSByteCountFormatter

type Target = NSFormatter

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Hash for NSByteCountFormatter

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Message for NSByteCountFormatter

fn retain(&self) -> Retained<Self>

where Self: Sized,

Increment the reference count of the receiver.

impl NSCoding for NSByteCountFormatter

unsafe fn encodeWithCoder(&self, coder: &NSCoder)

where Self: Sized + Message,

Available on crate features NSObject and NSCoder only.

unsafe fn initWithCoder( this: Allocated<Self>, coder: &NSCoder, ) -> Option<Retained<Self>>

where Self: Sized + Message,

Available on crate features NSObject and NSCoder only.

impl NSCopying for NSByteCountFormatter

fn copy(&self) -> Retained<Self::Result>

where Self: Sized + Message + CopyingHelper,

Available on crate feature NSObject only.

Returns a new instance that’s a copy of the receiver.

unsafe fn copyWithZone(&self, zone: *mut NSZone) -> Retained<Self::Result>

where Self: Sized + Message + CopyingHelper,

Available on crate feature NSObject only.

Returns a new instance that’s a copy of the receiver.

impl NSObjectProtocol for NSByteCountFormatter

fn isEqual(&self, other: Option<&AnyObject>) -> bool

where Self: Sized + Message,

Check whether the object is equal to an arbitrary other object.

fn hash(&self) -> usize

where Self: Sized + Message,

An integer that can be used as a table address in a hash table structure.

fn isKindOfClass(&self, cls: &AnyClass) -> bool

where Self: Sized + Message,

Check if the object is an instance of the class, or one of its subclasses.

fn is_kind_of<T>(&self) -> bool

where T: ClassType, Self: Sized + Message,

👎Deprecated: use isKindOfClass directly, or cast your objects with AnyObject::downcast_ref

Check if the object is an instance of the class type, or one of its subclasses.

fn isMemberOfClass(&self, cls: &AnyClass) -> bool

where Self: Sized + Message,

Check if the object is an instance of a specific class, without checking subclasses.

fn respondsToSelector(&self, aSelector: Sel) -> bool

where Self: Sized + Message,

Check whether the object implements or inherits a method with the given selector.

fn conformsToProtocol(&self, aProtocol: &AnyProtocol) -> bool

where Self: Sized + Message,

Check whether the object conforms to a given protocol.

fn description(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object.

fn debugDescription(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object to use when debugging.

fn isProxy(&self) -> bool

where Self: Sized + Message,

Check whether the receiver is a subclass of the NSProxy root class instead of the usual NSObject.

fn retainCount(&self) -> usize

where Self: Sized + Message,

The reference count of the object.

impl PartialEq for NSByteCountFormatter

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl RefEncode for NSByteCountFormatter

const ENCODING_REF: Encoding = <NSFormatter as ::objc2::RefEncode>::ENCODING_REF

The Objective-C type-encoding for a reference of this type.

impl DowncastTarget for NSByteCountFormatter

impl Eq for NSByteCountFormatter