Set Matrix Zeroes in swift

Question: – if on given matrix any element is zero set entire row & column to zero [Link]

func setZeroes(_ matrix: inout [[Int]]) {
    //Approach 2
    
    var matrixCount = matrix.count;
    var firstRowCount = matrix[0].count;
    var isCol = false
    for rowIndex in 0..<matrixCount {
        if matrix[rowIndex][0] == 0 {
            isCol = true
        }
        
        for colIndex in 1..<firstRowCount {
            if matrix[rowIndex][colIndex] == 0 {
                matrix[0][colIndex] = 0
                matrix[rowIndex][0] = 0
            }
        }
    }
    
    for rowIndex in 1..<matrixCount {
        for colIndex in 1..<firstRowCount {
            if (matrix[rowIndex][0] == 0) || ((matrix[0][colIndex] == 0)) {
                matrix[rowIndex][colIndex] = 0
            }
        }
    }
    
    if matrix[0][0] == 0 {
        for colIndex in 0..<firstRowCount {
            // Making cols to zero
            matrix[0][colIndex] = 0
        }
    }
    
    if isCol {
        for rowIndex in 0..<matrixCount {
            // Making rows to zero
            matrix[rowIndex][0] = 0
        }
    }
    
}
var matrixValue = [[1,1,1],[1,0,1],[1,1,1]]
setZeroes(&matrixValue)
print(matrixValue)
//Input: matrix = [[1,1,1],[1,0,1],[1,1,1]]
//Output: [[1,0,1],[0,0,0],[1,0,1]]