Count - variable as part of object name [duplicate] - objective-c

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This question already has answers here:
Objective C Equivalent of PHP's "Variable Variables" [duplicate]
(2 answers)
Closed 8 years ago.
How I can integrate a count var (i = 1,2,3,4,...) into a object-name?
My code doesn't work.
for (int i=1; (i<=4); i++) {
self.cmdFertigOutlet(i).layer.cornerRadius = self.cmdAbbrechenOutlet(i).layer.cornerRadius = self.lblYear(i).layer.cornerRadius = self.lblMonth(i).layer.cornerRadius = self.lblDay(i).layer.cornerRadius = self.lblHour(i).layer.cornerRadius = self.lblMinute(i).layer.cornerRadius = self.lblSecond(i).layer.cornerRadius = self.txtBeschreibung(i).layer.cornerRadius = 5;
}
.h file
#property (weak, nonatomic) IBOutlet UIButton *cmdAbbrechenOutlet1;
#property (weak, nonatomic) IBOutlet UIButton *cmdFertigOutlet1;
#property (weak, nonatomic) IBOutlet UITextField *txtBeschreibung1;
#property (weak, nonatomic) IBOutlet UILabel *lblYear1;
#property (weak, nonatomic) IBOutlet UILabel *lblMonth1;
#property (weak, nonatomic) IBOutlet UILabel *lblDay1;
#property (weak, nonatomic) IBOutlet UILabel *lblHour1;
#property (weak, nonatomic) IBOutlet UILabel *lblMinute1;
#property (weak, nonatomic) IBOutlet UILabel *lblSecond1;
#property (weak, nonatomic) IBOutlet UIButton *cmdAbbrechenOutlet2;
#property (weak, nonatomic) IBOutlet UIButton *cmdFertigOutlet2;
#property (weak, nonatomic) IBOutlet UITextField *txtBeschreibung2;
#property (weak, nonatomic) IBOutlet UILabel *lblYear2;
#property (weak, nonatomic) IBOutlet UILabel *lblMonth2;
#property (weak, nonatomic) IBOutlet UILabel *lblDay2;
#property (weak, nonatomic) IBOutlet UILabel *lblHour2;
#property (weak, nonatomic) IBOutlet UILabel *lblMinute2;
#property (weak, nonatomic) IBOutlet UILabel *lblSecond2;
and so on... 3,4
.m file instead of use this (works), i will use the for-statement. i don't understand, how to put my object-names into an array and then use it with the for-statement.
self.cmdFertigOutlet1.layer.cornerRadius =
self.cmdAbbrechenOutlet1.layer.cornerRadius =
self.lblYear1.layer.cornerRadius =
self.lblMonth1.layer.cornerRadius =
self.lblDay1.layer.cornerRadius =
self.lblHour1.layer.cornerRadius =
self.lblMinute1.layer.cornerRadius =
self.lblSecond1.layer.cornerRadius =
self.txtBeschreibung1.layer.cornerRadius = 5;
self.cmdFertigOutlet1.layer.masksToBounds =
self.cmdAbbrechenOutlet1.layer.masksToBounds =
self.lblYear1.layer.masksToBounds =
self.lblMonth1.layer.masksToBounds =
self.lblDay1.layer.masksToBounds =
self.lblHour1.layer.masksToBounds =
self.lblMinute1.layer.masksToBounds =
self.lblSecond1.layer.masksToBounds =
self.txtBeschreibung1.layer.masksToBounds = YES;
self.cmdFertigOutlet2.layer.cornerRadius =
self.cmdAbbrechenOutlet2.layer.cornerRadius =
self.lblYear2.layer.cornerRadius =
self.lblMonth2.layer.cornerRadius =
self.lblDay2.layer.cornerRadius =
self.lblHour2.layer.cornerRadius =
self.lblMinute2.layer.cornerRadius =
self.lblSecond2.layer.cornerRadius =
self.txtBeschreibung2.layer.cornerRadius = 5;
self.cmdFertigOutlet2.layer.masksToBounds =
self.cmdAbbrechenOutlet2.layer.masksToBounds =
self.lblYear2.layer.masksToBounds =
self.lblMonth2.layer.masksToBounds =
self.lblDay2.layer.masksToBounds =
self.lblHour2.layer.masksToBounds =
self.lblMinute2.layer.masksToBounds =
self.lblSecond2.layer.masksToBounds =
self.txtBeschreibung2.layer.masksToBounds = YES;
The object names are like:
cmdFertigOutlet1, cmdFertigOutlet2, cmdFertigOutlet3, and so on.
cmdAbbrechenOutlet1, cmdAbbrechenOutlet2, cmdAbbrechenOutlet3, and so
on

Answer 1

You can't - the variables' names are compile-time properties and don't exist at runtime.
Instead, use arrays with four elements:
for (int i = 0; i < 4; i++) {
self.cmdFertigOutlet[i].layer.cornerRadius = ...
}

Answer 2

I'm going to give you a simple example using NSTextField objects (to keep it simple). I think you'll understand how to carry this forward in your application.
From your syntax, I also assume you're programming in Swift. To demonstrate a technique:
In my AppDelegate class I declare IBOutlets to 4 text boxes and connect them in IB:
#IBOutlet var testTextBox0:NSTextField!
#IBOutlet var testTextBox1:NSTextField!
#IBOutlet var testTextBox2:NSTextField!
#IBOutlet var testTextBox3:NSTextField!
I also declare a mutable array:
var testTextBoxes:NSMutableArray = NSMutableArray()
Then in the applicationDidFinishLaunching function I say:
testTextBoxes.addObject(testTextBox0)
testTextBoxes.addObject(testTextBox1)
testTextBoxes.addObject(testTextBox2)
testTextBoxes.addObject(testTextBox3)
var localTextField:NSTextField = testTextBox0
for var i:Int = 0; i < 4; i++
{
localTextField = testTextBoxes.objectAtIndex(i) as NSTextField
localTextField.stringValue = "text field \(i)"
}
and all the text box string values get set properly.
This illustrates a technique of loading your objects into an array (or arrays for several different object types) and accessing them sequentially in a for loop.
Here's another example in Objective C using button objects this time:
transformButtons = [[NSMutableArray alloc] initWithCapacity:10]; // transformButtons is an instance variable
[transformButtons addObject:button0];
[transformButtons addObject:button1];
[transformButtons addObject:button2];
[transformButtons addObject:button3];
[transformButtons addObject:button4];
[transformButtons addObject:button5];
[transformButtons addObject:button6];
[transformButtons addObject:button7];
[transformButtons addObject:button8];
[transformButtons addObject:button9];
Then later in the code:
NSButton *localButton;
for(int i = 0; i < 10; i++)
{
localButton = [transformButtons objectAtIndex:i];
[localButton setEnabled:YES];
[localButton setHidden:NO];
[localButton setTitle:buttonNames[i]];
}
Of course in the .h file this stuff was declared as:
NSMutableArray *transformButtons;
IBOutlet NSButton *button0;
IBOutlet NSButton *button1;
IBOutlet NSButton *button2;
IBOutlet NSButton *button3;
IBOutlet NSButton *button4;
IBOutlet NSButton *button5;
IBOutlet NSButton *button6;
IBOutlet NSButton *button7;
IBOutlet NSButton *button8;
IBOutlet NSButton *button9;
Hope this helps.
EDIT2:
In the .h file, if you want to access these variables from another class, why not:
#public
IBOutlet UIButton *cmdAbbrechenOutlet1;
IBOutlet UIButton *cmdFertigOutlet1;
IBOutlet UITextField *txtBeschreibung1;
IBOutlet UILabel *lblYear1;
IBOutlet UILabel *lblMonth1;
IBOutlet UILabel *lblDay1;
IBOutlet UILabel *lblHour1;
IBOutlet UILabel *lblMinute1;
IBOutlet UILabel *lblSecond1;
IBOutlet UIButton *cmdAbbrechenOutlet2;
IBOutlet UIButton *cmdFertigOutlet2;
IBOutlet UITextField *txtBeschreibung2;
IBOutlet UILabel *lblYear2;
IBOutlet UILabel *lblMonth2;
IBOutlet UILabel *lblDay2;
IBOutlet UILabel *lblHour2;
IBOutlet UILabel *lblMinute2;
IBOutlet UILabel *lblSecond2;
// And so on.....
#private
// Your private instance variables
In your .m file cmdAbbrechenOutlet1 could simply be accessed as cmdAbbrechenOutlet1. In another class where yourClass is visible, it could be accessed as yourClass->cmdAbbrechenOutlet1.