CODEWITHSUNDEEP
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danielsteel
danielsteel

Reputation: 91

Adding values in iOS using float

I'm looking to sum two values i have and then display these as a new UILabel.

I've read online about using float however i'm coming unstuck, here's my code below..

The sum i'm looking to do is : shippingLabel (Shipping Costs) + costLabel (Product Price) then having this then accessible in a new UILabel to display (TotalPrice)

The issue i'm having is that the value's are returning as 00.00

//TotalPrice
// Grab the values from the UITextFields.
float ShippingValue = [[shippingLabel text] floatValue];
float CostValue = [[costLabel text] floatValue];

// Sum them.
float floatNum = ShippingValue + CostValue;
TotalPrice.text = [[NSString alloc] initWithFormat:@"%f", floatNum];

TotalPrice = [[UILabel alloc] initWithFrame:CGRectMake(60.0f, 200.0f, 300.0f, 25.0f)];
TotalPrice.textColor = [UIColor colorWithHexString:@"5b5b5b"];
TotalPrice.backgroundColor = [UIColor clearColor];
TotalPrice.font = [UIFont boldSystemFontOfSize:12.0f];
TotalPrice.textAlignment = UITextAlignmentLeft;
[self.view addSubview:TotalPrice];

Upvotes: 0

Views: 908

Answers (2)

Hunter
Hunter

Reputation: 136

My guess, you are expecting there will be a UILabel with a total number on it,but truth is you see no total number at all. I think here is the problem 

TotalPrice.text = [[NSString alloc] initWithFormat:@"%f", floatNum];

You are trying to make TotalPrice's text the total number while TotalPrice haven't been allocated, so TotalPrice won't get a thing. You may just put this line after TotalPrice is allocated,it should work. May it help.

Upvotes: 0

Mick MacCallum
Mick MacCallum

Reputation: 130222

It's hard to accurately answer this considering you haven't stated what the problem is exactly. But, the most obvious things that jump out at me are:

1: You are assigning a text value to TotalPrice before you create it. The lines should appear in the following order.

TotalPrice = [[UILabel alloc] initWithFrame:CGRectMake(60.0f, 200.0f, 300.0f, 25.0f)];
TotalPrice.text = [[NSString alloc] initWithFormat:@"%f", floatNum];

2: Your comment indicates that you want to multiply the two values together, but you use an addition operator. This probably isn't your problem, but we all make silly mistakes.

// Multiply them.
float floatNum = ShippingValue * CostValue;

3: The float value of shippingLabel's text maybe inaccurate due to non numerical values in the label's text.

Side note: You should name your variables like this totalPrice instead of TotalPrice. It is common practice to use lower case first characters on instances and capitals on classes.

Upvotes: 1

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