objective-c - 为什么它不能从主文件中识别头文件中的@properties？

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

对@synthesize有点疯狂，是吗？我确实相信您的主要问题是，在@property的结束}之后，@interface声明需要为。

我很惊讶编译器没有抛出一个格陵兰大小的危险信号。

另外，您可能打算制作一个UIView的自定义子类；我将使用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