Struct TKSmartCardPINFormat

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pub struct TKSmartCardPINFormat { /* private fields */ }

Available on crate feature TKSmartCard only.

Expand description

Specifies PIN formatting properties.

Implementations§

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impl TKSmartCardPINFormat

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pub unsafe fn charset(&self) -> TKSmartCardPINCharset

Format of PIN characters.

Note: Default value: TKSmartCardPINCharsetNumeric

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pub unsafe fn setCharset(&self, charset: TKSmartCardPINCharset)

Setter for charset.

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pub unsafe fn encoding(&self) -> TKSmartCardPINEncoding

Encoding of PIN characters.

Note: Default value: TKSmartCardPINEncodingASCII

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pub unsafe fn setEncoding(&self, encoding: TKSmartCardPINEncoding)

Setter for encoding.

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pub unsafe fn minPINLength(&self) -> NSInteger

Minimum number of characters to form a valid PIN.

Note: Default value: 4

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pub unsafe fn setMinPINLength(&self, min_pin_length: NSInteger)

Setter for minPINLength.

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pub unsafe fn maxPINLength(&self) -> NSInteger

Maximum number of characters to form a valid PIN.

Note: Default value: 8

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pub unsafe fn setMaxPINLength(&self, max_pin_length: NSInteger)

Setter for maxPINLength.

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pub unsafe fn PINBlockByteLength(&self) -> NSInteger

Total length of the PIN block in bytes.

Note: Default value: 8

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pub unsafe fn setPINBlockByteLength(&self, pin_block_byte_length: NSInteger)

Setter for PINBlockByteLength.

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pub unsafe fn PINJustification(&self) -> TKSmartCardPINJustification

PIN justification within the PIN block.

Note: Default value: TKSmartCardPINJustificationLeft

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pub unsafe fn setPINJustification( &self, pin_justification: TKSmartCardPINJustification, )

Setter for PINJustification.

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pub unsafe fn PINBitOffset(&self) -> NSInteger

Offset in bits within the PIN block to mark a location for filling in the formatted PIN (justified with respect to PINJustification).

Note: Default value: 0

The offset, in bits, within the PIN block to mark a location for filling in the formatted PIN, which is justified with respect to the PINJustification property value.

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pub unsafe fn setPINBitOffset(&self, pin_bit_offset: NSInteger)

Setter for PINBitOffset.

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pub unsafe fn PINLengthBitOffset(&self) -> NSInteger

Offset in bits within the PIN block to mark a location for filling in the PIN length (always left justified).

Note: Default value: 0

The offset, in bits, within the PIN block to mark a location for filling in the PIN length, which is always left justified.

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pub unsafe fn setPINLengthBitOffset(&self, pin_length_bit_offset: NSInteger)

Setter for PINLengthBitOffset.

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pub unsafe fn PINLengthBitSize(&self) -> NSInteger

Size in bits of the PIN length field. If set to 0, PIN length is not written.

Note: Default value: 0

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pub unsafe fn setPINLengthBitSize(&self, pin_length_bit_size: NSInteger)

Setter for PINLengthBitSize.

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impl TKSmartCardPINFormat

Methods declared on superclass NSObject.

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

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

Methods from Deref<Target = NSObject>§

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

Handle messages the object doesn’t recognize.

See Apple’s documentation for details.

Methods from Deref<Target = AnyObject>§

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

Available on crate feature TKToken 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());

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

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

Available on crate feature TKToken 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.

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pub fn downcast_ref<T>(&self) -> Option<&T>
where T: DowncastTarget,

Available on crate feature TKToken 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`
    }
}