Adding an object at a specific index of an NSMutableArray
[myMutableArray insertObject:myObject atIndex:42];To add an object to the front of the array, use 0 as the index:
[myMutableArray insertObject:myObject atIndex:0];
Take a look at the insertObject:atIndex: method of the NSMutableArray class. Adding to the "front" of the array implies index 0.
For example:
NSMutableArray * array = [[NSMutableArray alloc] initWithCapacity:3];[array addObject:@"b"]; // Contains "b"[array insertObject:@"a" atIndex:0]; // Contains "a", "b"[array insertObject:@"c" atIndex:2]; // Contains "a", "b", "c"
Updated for Swift 3:
If you want to Add an object at a specific index of a NSMutableArray, use below a simple line of code:
self.yourMutableArrayName.insert(<#T##newElement: String##String#>, at: <#T##Int#>)Example: if you want to add string: "Nature" at index: 3
var str = "Nature"self.yourMutableArrayName.insert(str, at: 3) // Enjoy..!