Invalid values when using allKeys and allValues to generate mutable array for x and y

[DevGW]

I am receiving a json array from an api that that contains numeric days (30) as keys and values for each of those days as values.

Here's what I have:

self.queryChart.xElements = [[NSMutableArray alloc] initWithArray:[[stats allValues] mutableCopy]]; self.queryChart.yElements = [[NSMutableArray alloc] initWithArray:[[stats allKeys] mutableCopy]];

However I'm getting an "Invalid Values" message on the chart.

The values are: Stats: { 1 = 4; 10 = 4; 12 = 10; 13 = 9; 14 = 12; 15 = 25; 16 = 12; 17 = 13; 18 = 14; 19 = 16; 2 = 2; 20 = 6; 21 = 4; 22 = 6; 23 = 3; 24 = 2; 25 = 10; 26 = 8; 27 = 2; 28 = 4; 29 = 5; 3 = 2; 30 = 1; 31 = 1; 4 = 3; 5 = 1; 6 = 5; 7 = 0; 8 = 4; 9 = 2; }

any guidance would be greatly appreciated.