我正在關注幾年前編寫的一本Objective-C書籍,並且我學習瞭如何使用界面構建器來鏈接和設計UI的部分。現在看起來相當於「故事板」。我遵循IB的指示並將它們翻譯成故事板,而且似乎大部分工作。但是,我沒有讓我的實例變量UILabel顯示在屏幕上。所有的按鈕和標籤都是在故事板中創建的,而不是以編程方式創建的。任何幫助,將不勝感激!舊的iPhone SDK代碼不起作用?
ViewController.h
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController {
IBOutlet UILabel *randNumber; //instance variable
}
-(IBAction)seed:(id)sender;
-(IBAction)generate:(id)sender;
@property (retain,nonatomic) UILabel *randNumber; //getter and setter methods
@end
ViewController.m
@interface ViewController()
@end
@implementation ViewController
@synthesize randNumber;
- (void)viewDidLoad
{
[super viewDidLoad];
}
-(IBAction)seed:(id)sender
{
srandom(time(NULL));
[randNumber setText:@"Generator seeded."];
}
-(IBAction)generate:(id)sender
{
//generate a random number between 0 and 100 inclusive
int generated;
generated = (random()%101);
[randNumber setText:[NSString stringWithFormat:@"%i",generated]];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
@end
你仍然可以使用沒有故事板的IB。 – sosborn 2013-05-08 05:08:34
所以有效的不是代碼不工作,但IB已經改變了,對吧? – 2013-05-08 05:15:18
http://www.raywenderlich.com/5138/beginning-storyboards-in-ios-5-part-1 – CRDave 2013-05-08 05:16:24