Question

通过本教程编写我的第一个iphone应用程序 - 我有一个自定义的UIView，方法是showDie，我的故事板上有两个UIView元素，我已经连接到我的ViewController。但是，两个UIView元素都有错误消息＆＃34;没有可见的@interface用于＆＃39; UIView＆＃39;声明选择器＆＃39; showDie＆＃39;。我认为是因为UIViews没有对XYZDieView进行子类化，但是当我从我的Storyboard中单击控制时，只有UIView出现在下拉列表中 - 没有XYZDieView。我尝试在ViewController.h中手动更改文本，但这不起作用（我没想到）。我是在正确的轨道上吗？我如何使用我的子类？（xcode 5）

XYZDieView.m

-(void)showDie:(int)num
{
    if (self.dieImage == nil){
        self.dieImage = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 90, 90)];
        [self addSubview:self.dieImage];
    }
    NSString *fileName = [NSString stringWithFormat:@"dice%d.png", num];

    self.dieImage.image = [UIImage imageNamed:fileName];
}

XYZViewController.h

#import <UIKit/UIKit.h>
#import "XYZDieView.h"

@interface XYZViewController : UIViewController

@property (weak, nonatomic) IBOutlet UILabel *sumLabel;
@property (strong, nonatomic) IBOutlet UIButton *rollButton;

@property (strong, nonatomic) IBOutlet UIView *leftDieView;
@property (strong, nonatomic) IBOutlet UIView *rightDieView;

@end

XYZViewController.m

#import "XYZViewController.h"
#import "XYZDiceDataController.h"

@interface XYZViewController ()

@end

@implementation XYZViewController

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

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

- (IBAction)rollButtonClicked:(UIButton *)sender {

    XYZDiceDataController *diceDataController = [[XYZDiceDataController alloc] init];
    int roll = [diceDataController getDiceRoll];
    int roll2 = [diceDataController getDiceRoll];

    [self.leftDieView showDie:roll];
    [self.rightDieView showDie:roll2];

    int sum = roll + roll2;

    NSString *sumText = [NSString stringWithFormat:@"Sum is %i", sum];
    self.sumLabel.text = sumText;
}

@end

Answer 1

是的，你是对的，问题是子类化。为了使视图符合接口构建器中的子类，您需要

点击故事板中的UIView
打开右侧检查员面板
单击身份检查器的第三个选项卡
添加课程

然后尝试再次将它连接到ViewController。

编辑：之后您可能需要投射XYZDieView myView = (XYZDieView*)leftDieView;

你如何勾选自定义UIView？

1 个答案: