---
title: "sel_getUid(_:)"
framework: objectivec
role: symbol
role_heading: Function
path: "objectivec/sel_getuid(_:)"
---

# sel_getUid(_:)

Registers a method name with the Objective-C runtime system.

## Declaration

```swift
func sel_getUid(_ str: UnsafePointer<CChar>) -> Selector
```

## Parameters

- `str`: A pointer to a C string. Pass the name of the method you wish to register.

## Return Value

Return Value A pointer of type SEL specifying the selector for the named method.

## Discussion

Discussion The implementation of this method is identical to the implementation of sel_registerName(_:). Version-Notes Prior to OS X version 10.0, this method tried to find the selector mapped to the given name and returned NULL if the selector was not found. This was changed for safety, because it was observed that many of the callers of this function did not check the return value for NULL.

## See Also

### Working with Selectors

- [sel_getName(_:)](objectivec/sel_getname(_:).md)
- [sel_registerName(_:)](objectivec/sel_registername(_:).md)
- [sel_isEqual(_:_:)](objectivec/sel_isequal(_:_:).md)