why wont it recognize the #properties from header file from main file? - objective-c

Question

UIView.h
#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>
#interface UIView : UIResponder {
IBOutlet UILabel *endLabel;
IBOutlet UIButton *goButton;
IBOutlet UITextField *textBox1;
IBOutlet UITextField *textBox2;
#property(nonatomic, retain) UILabel *endLabel;
#property(nonatomic, retain) UIButton *goButton;
#property(nonatomic, retain) UITextField *textBox1;
#property(nonatomic, retain) UITextField *textBox2;
}
- (IBAction)goButtonClicked;
#end
UIView.m
#import "UIView.h"
#implementation UIView
#synthesize textBox1, goButton;
#synthesize textBox2, goButton;
#synthesize textBox1, endLabel;
#synthesize textBox2, endLabel;
#synthesize goButton, endLabel;
- (IBAction)goButtonClicked {
}
#end

Answer 1

Going a bit crazy with the #synthesizes, are we? I do believe that your main problem here is that #property declarations need to be after the closing } of #interface.
I'm surprised the compiler didn't throw up a red flag the size of Greenland, tho'.
Additionally, you probably meant to make a custom subclass of UIView; I'll use MyView.
//MyView.m -- correct synthesize declaration
#synthesize textBox1, goButton, textBox2, endLabel;
//MyView.h -- correct interface declaration
#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>
#interface MyView : UIView {
IBOutlet UILabel *endLabel;
IBOutlet UITextField *textBox1;
IBOutlet UITextField *textBox2;
IBOutlet UIButton *goButton;
}
#property(nonatomic, retain) UIButton *goButton;
#property(nonatomic, retain) UILabel *endLabel;
#property(nonatomic, retain) UITextField *textBox1;
#property(nonatomic, retain) UITextField *textBox2;
#end

Answer 2

The first problem is that you're naming your class UIView, which already exists in UIKit. See #Williham's advice on resolving this.
You only need one #synthesize per property, and when the property name matches the instance variable name, you should only need to do something like this in your .m file:
#synthesize endLabel;
#synthesize goButton;
#synthesize textBox1;
#synthesize textBox2;
Also, you're likely to run into problems getting your IBAction method to work. To use a method for a target-action linkage, it must have a return type of IBAction (which you have correct) and accept an id parameter representing the sender. The canonical method signature looks like this:
- (IBAction) goButtonClicked:(id)sender;
I'd actually recommend a method name that's not explicitly tied to the button that invokes it, especially since there could be other ways to invoke the same action. (For example, if you were writing a desktop application, a key equivalent or menu command could do the same thing.)