ios - 制作由多个 View Controller 调用的自定义数字键盘类

Question

我是 Objective-c 和 iOS 编程的新手。我想使用自定义数字键盘进行游戏输入。有几种类型的游戏(game1 game2 game3)，游戏可能需要更多或更少的数字显示在数字键盘(控件)上。
每个游戏规则和显示属性都写在单独的 View Controller 类中。我尝试将数字键盘的副本从 game1 剪切并粘贴到其他 Controller 。它抛出一个错误(在构建时)，说我正在使用的数字按钮属性的名称已经被使用。

这是否需要我重命名和重新链接每个游戏的所有对象和属性。对我来说太多的维护开销。所以我一直在尝试制作一个源自 NSObject 的 NumPad 类.
这工作正常，直到我尝试从非 View Controller 类创建 View /容器 View 。我在 game1 View Controller 的 viewdidload 部分实例化小键盘对象。这就是我到目前为止所拥有的。

.h 文件

#import <Foundation/Foundation.h>
#import "NumberPadTestAppDelegate.h"

@interface NumPad : NSObject


-(void)numberPadSetUp: (int) numberOfButtons;

@end

.m 文件

#import "NumPad.h"

@implementation NumPad

-(void)numberPadSetUp: (int) numberOfButtons
{
      // Instantiate a Container View by code??? test.
   CGRect frame = CGRectMake(14, 47, 740, 370);
   UIView *Mycontainer = [[UIView alloc] initWithFrame:frame];
   Mycontainer.backgroundColor = [UIColor blueColor];
   [Mycontainer addSubview:Mycontainer];

      // This was here for testing before adding the above four lines.
   for (int a = 1; a < numberOfButtons +1; a++)
        {
        NSLog(@"Button %i has been added.",a);
        }
   NSLog(@"  ");
   NSLog(@"Numberpad setup is complete.");
} // End of "numberPadSetUp" routine.

@end

来自 game1 测试 Controller 的 .m 文件

#import "NumberPadTestViewController.h"

@interface NumberPadTestViewController ()

@end

@implementation NumberPadTestViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

   NumPad *MyNumberPad =[[NumPad alloc]init];

   [MyNumberPad numberPadSetUp:9];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

此代码给出了书面的运行时错误。

int main(int argc, char * argv[])
{
   @autoreleasepool {
       return UIApplicationMain(argc, argv, nil, NSStringFromClass([NumberPadTestAppDelegate class]));
   }
}

我还想知道在 IB 中使用容器 View 控件是否可以完成任务，或者我是否会遇到与以前相同的命名错误？
我在这里想念什么？

Answer 1

问题出在这一行

[Mycontainer addSubview:Mycontainer];

您正在声明 Mycontainer并将其添加到自身。你应该像下面这样写类

#import "NumPad.h"

@implementation NumPad

#define kButtonWidth 50
#define kButtonHeight 15
#define kPadding 20

-(void)numberPadSetUp: (int) numberOfButtons
{
    // Instantiate a Container View by code??? test.
    // This was here for testing before adding the above four lines.
    int xPos = 0;
    int yPos = 0;
    for (int a = 1; a < numberOfButtons +1; a++)
    {
        UIButton *aButton = [UIButton buttonWithType:UIButtonTypeSystem];
        CGRect aButtonFrame = CGRectMake(xPos, yPos, kButtonWidth, kButtonHeight);
        aButton.frame = aButtonFrame;
        [aButton setTitle:[NSString stringWithFormat:@"%d",a] forState:UIControlStateNormal];
        [self addSubview:aButton];

        xPos+=kButtonWidth+kPadding;

        if(fmod(a, 3)==0){
            yPos+=kButtonHeight+kPadding;
            xPos = 0;
        }


        NSLog(@"Button %i has been added.",a);
    }
    NSLog(@"  ");
    NSLog(@"Numberpad setup is complete.");
} // End of "numberPadSetUp" routine.


@end

在你的主要类(class)中

NumPad *MyNumberPad =[[NumPad alloc]initWithFrame:CGRectMake(14, 47, 740, 370)];
[MyNumberPad numberPadSetUp:9];
[self.view addSubview:MyNumberPad];
[self.view bringSubviewToFront:MyNumberPad];

这将为您提供类似于 iOS6/iOS7 中的以下图像的结果