1

我正在尝试使用图像列表制作 UIScrollView,这些图像在单击后将切换到不同的图像。案例是模拟选择图像。

我尝试使用 UIButton 而不是 UIImage 并且切换图像非常容易,但是当我单击按钮时无法滚动它们。只有当我在按钮之间单击时它才会滚动。

比我尝试使用 UIImages 并且它很容易滚动,但是单击后我无法切换图像。

我挖了一下,发现了以下帖子:Xcode:如何在触摸图像时更改图像(相同位置)?

这似乎是我需要的东西,但我做错了什么。

我的代码:

//TouchSimpleView.h
#import <UIKit/UIKit.h>

@interface TouchSimpleView : UIImageView {
    id delegate;
}
@property (retain) id delegate;
@end

@interface NSObject (TouchSimpleView)
-(void)didTouchView:(UIView *) aView;
@end


//  TouchSimpleView.m
#import "TouchSimpleView.h"
@implementation TouchSimpleView
@synthesize delegate;

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}

- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@"touchesBagan");
    if(delegate != nil && [delegate respondsToSelector:@selector(didTouchView:)]) {
        [delegate didTouchView:self];
    }
    [super touchesBegan:touches withEvent:event];
}
@end

我在上面这样使用:

//  ViewController.h
#import <UIKit/UIKit.h>
#import "TouchSimpleView.h"

@interface ViewController : UIViewController {
    TouchSimpleView *touchView;
    UIImageView *bankImageView;
}

@property (nonatomic, retain) TouchSimpleView *touchView;
@property (nonatomic, retain) UIImageView *bankImageView;
@end


//  ViewController.m
#import "ViewController.h"

@interface ViewController ()
@end

@implementation ViewController
@synthesize touchView;
@synthesize bankImageView;

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

    touchView = [[TouchSimpleView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
    touchView.delegate = self;
    [self.view addSubview:touchView];

    bankImageView = [[UIImageView alloc] initWithFrame:touchView.frame];
    bankImageView.image = [UIImage imageNamed:@"1.jpg"];
    [touchView addSubview: bankImageView];
}

- (void)didTouchView:(UIView *)aView {
    NSLog(@"view touched; changing image");
}

@end

我在开始时没有提到 UIScrollView,但我想让这个简单的示例正常工作,而不是将 touchView 添加到 UIScrollView。

我是 iOS 编程的初学者。请指教。

4

2 回答 2

1

确保UIImageView属性 userInteractionEnabled设置为YES.
默认值为NO.

于 2012-10-23T20:24:47.317 回答
0

解决方案是:

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

    touchView = [[TouchSimpleView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
    touchView.delegate = self;
    touchView.userInteractionEnabled = YES;
    touchView.image = [UIImage imageNamed:@"1.jpg"];
    [self.view addSubview:touchView];
}

谢谢@Mundi

于 2012-10-25T19:57:52.360 回答