Menu
I created a structure like this
typedef struct Node {
NSString* Description;
NSString* AE;
NSString* IP;
NSString* Port;
} Node;
I need to create NSMutableArray of this Node structure I need to know how create object of node path it to the NSMutableArray retrieve it and read for example the port.
534
Create an Array of struct Using the malloc() Function in C The memory can be allocated using the malloc() function for an array of struct . This is called dynamic memory allocation. The malloc() (memory allocation) function is used to dynamically allocate a single block of memory with the specified size.
To create an array of structures using the struct function, specify the field value arguments as cell arrays. Each cell array element is the value of the field in the corresponding structure array element. For code generation, corresponding fields in the structures must have the same type.
To declare an array in Objective-C, we use the following syntax. type arrayName [ arraySize ]; type defines the data type of the array elements. type can be any valid Objective-C data type.
In the Go language, you can set a struct of an array. To do so see the below code example. Where type company struct has a slice of type employee struct. Here, you can see the two different structs, and the employee struct is used as an array in the company struct.
The NSMutableArray class declares the programmatic interface to objects that manage a modifiable array of objects. This class adds insertion and deletion operations to the basic array-handling behavior inherited from NSArray. NSMutableArray is “toll-free bridged” with its Core Foundation counterpart, CFMutableArray.
This article will demonstrate multiple methods of how to create an array of structs in C++. Fixed length array of structs can be declared using [] C-style array notation. In this case, we defined an arbitrary struct named Company with multiple data members and initialized 2 element array.
In this case, we defined an arbitrary struct named Company with multiple data members and initialized 2 element array. The only downside of this method is that the declared array is a raw object without any built-in functions.
Alternatively, we can utilize a std::vector container to declare a variable array that provides multiple built-in methods for data manipulation. The std::vector object can be initialized with the same notation as the previous example.
After running into this problem, I came across this thread which helped, but was more complicated than the solution I ended up with.
Basically the NSValue is the wrapper for your struct, you don't need to create a new class yourself.
// To add your struct value to a NSMutableArray
NSValue *value = [NSValue valueWithBytes:&structValue objCType:@encode(MyStruct)];
[array addObject:value];
// To retrieve the stored value
MyStruct structValue;
NSValue *value = [array objectAtIndex:0];
[value getValue:&structValue];
I hope this answer will save the next person a bit of time.
180
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With