How to output text of NSMutableArray element count to iPhone label

Question

NSUInteger arrayLength = [annotations count];

    UILabel* arrayLengthLabel = [[UILabel alloc] initWithFrame:CGRectMake(50, 100, 200, 100)];
    arrayLengthLabel.text = @"%@", arrayLength;
    [self.view addSubview:arrayLengthLabel];

I have the above code, which I have researched.

The problem is when outputting the arrays length count to the label.

I should have 4 elements in the array, but this is not outputting the number of elements, and I am sure I am making a schoolboy error here.

Cheers for help in advance

Thomas Clayson · Accepted Answer · 2012-09-03 15:42:04Z

1

Here is the code I would use:

int arrayLength = [annotations count];
UILabel* arrayLengthLabel = [[UILabel alloc] initWithFrame:CGRectMake(50, 100, 200, 100)];
arrayLengthLabel.text = [NSString stringWithFormat:@"%i",arrayLength];
[self.view addSubview:arrayLengthLabel];

I'm using a standard int and using the code %i instead of %@. This may be your issue. I don't know offhand if an NSUInteger requires %i, but I definitely know int uses %i.

Also, I don't know if your way of doing an NSString works without testing, so I've used the "full" format, which I know definitely works.

answered Sep 3, 2012 at 15:42

Thomas Clayson

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rdurand · Accepted Answer · 2012-09-03 16:07:06Z

1

You can do it that way :

UILabel* myLabel = [[UILabel alloc] initWithFrame: CGRectMake(25, 100, 110, 100)];
myLabel = [NSString stringWithFormat: @"%i", [myArray count]];
[self.view addSubview: myLabel];

edited Sep 3, 2012 at 16:07

answered Sep 3, 2012 at 15:45

rdurand

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2 Comments

Thomas Clayson Over a year ago

NSArray's count method outputs a NSUInteger which is just a 32/64bit unsigned integer and I don't believe it responds to stringValue developer.apple.com/library/mac/documentation/Cocoa/Reference/… I think you're thinking of NSNumber

rdurand Over a year ago

Oops, you're right. My mistake. I'll change that, even though the other answers use this too.

Vimal Venugopalan · Accepted Answer · 2012-09-03 15:44:11Z

0

Make the changes as follows:

NSUInteger arrayLength = [annotations count];
UILabel* arrayLengthLabel = [[UILabel alloc] initWithFrame:CGRectMake(50, 100, 200, 100)];
arrayLengthLabel.text = [NSString stringWithFormat:@"%d", arrayLength];//changes made here
[self.view addSubview:arrayLengthLabel];

answered Sep 3, 2012 at 15:44

Vimal Venugopalan

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