Linphone：类型UnsafePointer <MSList> 不符合协议序列

Question

I am trying to loop through all calls in Linphone and find out the status for each call but I am unable to loop through the MSList.

This is the code I am trying:

for call in linphone_core_get_calls(lc) {

        }

This is the error it gives: Type 'UnsafePointer!' (aka 'ImplicitlyUnwrappedOptional>') does not conform to protocol 'Sequence'

Answer 1

You can do that in the following ways:

let calls = linphone_core_get_calls(lc)

for index in 0..<ms_list_size(calls) {
    // MSList is a struct, data is a generic field containing what you need
    let data = ms_list_nth_data(calls, index)

    // bind the memory to the type you need
    // or just do what you need here
}

You can also use the forEach method with a C callback of type MSIterateFunc

ms_list_for_each(calls) { element in 
    let element = element?.bindMemory(to: MSList.self, capacity: 1)
    let data = element?.pointee.data

    // bind the memory to the type you need
    // or just do what you need here
}

There are other ms_list_* methods you should check to achieve what you need. Be careful when working with MSList as you work directly with UnsfafePointers .