iOS 5 : UIStepper Control

iOS 5 : UIStepper Control:
There is a new pre-built control in iOS 5 for incrementing or decrementing a value, UIStepper. The control has two buttons aligned horizontally, one labeled with a plus (+) the other a minus (-).

One nice feature is a continuous option, wherein if the user presses and holds down either +/- button, the stepper value is incremented repeatedly. The longer the button is held down, the faster the increment will occur. Also, you can have the increment value wrap around when a range of values is specified, for example, if you set min and max to 0 and 99 respectively, when the value reaches 99, the next value will be 0 (and vice-versa).



Below is a screenshot that shows the output of the example code below:



Below is a short code example showing the various properties available in UIStepper:

// Create a label to show the value in the stepper
label = [[UILabel alloc] initWithFrame:CGRectMake(10, 20, 100, 30)];   
[label setTextColor:[UIColor whiteColor]];
[label setBackgroundColor:[UIColor clearColor]];
[label setTextAlignment:UITextAlignmentLeft];
[label setText: @"Quantity:"];
[[self view] addSubview:label];

// Frame defines location, size values are ignored
UIStepper *stepper = [[UIStepper alloc] initWithFrame:CGRectMake(120, 20, 0, 0)];   

// Set action target and action for a particular value changed event
[stepper addTarget:self action:@selector(stepperPressed:) forControlEvents:UIControlEventValueChanged];

// Set min and max
[stepper setMinimumValue:0];
[stepper setMaximumValue:99];

// Value wraps around from minimum to maximum
[stepper setWraps:YES];

// If continuos (default), changes are sent for each change in stepper,
// otherwise, change event occurs once user lets up on button
[stepper setContinuous:NO];

// To change the increment value for each step
// (default is 1)
[stepper setStepValue:10];