iOS Programming Slides, Objective C, Getting Started With iOS Programming

1. iOS Programming
Objective C + iOS

2. Profile
Ankit Desai
 Ph.D. Scholar, IET, Ahmedabad University
 Education: M. Tech. CE, B.E. I. T.
 Experience: 7.5 Years (Academic and Research)
 Research Interest: IoT, Big Data Analytics,
Machine Learning, Data Mining.

3. UIPickerView Control
 Drag a UIPickerView on xib
 Add delegates after class-name
<UIPickerViewDataSource,UIPickerViewDelegate>
 Declare two NSArray in .h file
 NSArray *arrItems;
 NSArray *arrLocation;

4. Initialize arrays in .m files
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
arrItems=[[NSArray
alloc]initWithObjects:@"iphone",@"android",@"java",@"testing", nil];
arrLocation=[[NSArray
alloc]initWithObjects:@"ahmedabad",@"baroda",@"surat", nil];
}

5. Add delegates methods 1 & 2
// returns the number of 'columns' to display.
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{ return 2; }
// returns the # of rows in each component..
- (NSInteger)pickerView:(UIPickerView *)pickerView
numberOfRowsInComponent:(NSInteger)component
{
if (component==0) {
return [arrItems count];
}
else {
return [arrLocation count];
}
}

6. - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row
forComponent:(NSInteger)component
{
if (component==0) {
return [arrItems objectAtIndex:row];
}
else {
return [arrLocation objectAtIndex:row];
}
}
Add delegates methods 3

7. - (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row
inComponent:(NSInteger)component
{
NSString *Str;
if (component==0) {
Str =[arrItems objectAtIndex:row];
}
else{
Str = [arrLocation objectAtIndex:row];
}
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"selected" message:Str
delegate:nil cancelButtonTitle:@"ok" otherButtonTitles:nil, nil];
[alert show];
}
Add delegates methods 4

8. Output

9. Thank you
 For further communication or queries:
 Contact me:
 desaiankitb@gmail.com
 www.fb.com/desaiankitb