Question

我正在创建一个customview，它是UIScrollView的子类。我在UIButtons内动态添加了UIScrollView以及图片和动作。但是scrollview没有按钮水平滚动。我知道在SO上多次讨论过这个话题。我尝试了在SO上发布的所有帖子，但没有得到预期的结果。关于我哪里出错的任何建议都会有所帮助。

MyCustomView.h

@interface MyCustomView : UIScrollView

@property (strong, nonatomic) IBOutlet UIScrollView *scrollView;
+ (id)customView;

@end

MyCustomView.m

@implementation MyCustomView
@synthesize scrollView;

+ (id)customView
{
    MyCustomView *customView = [[[NSBundle mainBundle]  loadNibNamed:@"MyCustomView" owner:nil options:nil] lastObject];


    if ([customView isKindOfClass:[MyCustomView class]])
        return customView;
    else
        return nil;
}

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {

    }
    return self;
}

- (void)drawRect:(CGRect)rect
{
    [self setupHorizontalScrollView];
}

- (void)setupHorizontalScrollView
{
    //scrollView.delegate = self;

    [self.scrollView setBackgroundColor:[UIColor blueColor]];
    [scrollView setCanCancelContentTouches:YES];

    scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;
    scrollView.clipsToBounds = NO;
    scrollView.scrollEnabled = YES;
    //scrollView.pagingEnabled = YES;

    CGFloat cx = 0;
    NSArray *buttons = @[@{@"Tag":@1,@"Image":[UIImage imageNamed:@"borderImage1.png"]},
                         @{@"Tag":@2,@"Image":[UIImage imageNamed:@"borderImage2.png"]},
                         @{@"Tag":@3,@"Image":[UIImage imageNamed:@"borderImage3.png"]},
                         @{@"Tag":@4,@"Image":[UIImage imageNamed:@"borderImage4.png"]},
                         @{@"Tag":@1,@"Image":[UIImage imageNamed:@"borderImage1.png"]},
                         @{@"Tag":@2,@"Image":[UIImage imageNamed:@"borderImage2.png"]},
                         @{@"Tag":@3,@"Image":[UIImage imageNamed:@"borderImage3.png"]},
                         @{@"Tag":@4,@"Image":[UIImage imageNamed:@"borderImage4.png"]},
                         @{@"Tag":@1,@"Image":[UIImage imageNamed:@"borderImage1.png"]}
                         ];

    // CGRect frame = CGRectMake(0.0f, 0.0f, 50.0f, 30.0f);
    for (NSDictionary *dict in buttons)
    {
        UIButton *button =[UIButton buttonWithType:UIButtonTypeRoundedRect];
        CGRect rect = button.frame;
        rect.size.height = 40;
        rect.size.width = 40;
        rect.origin.x = cx;
        rect.origin.y = 0;

        button.frame = rect;
        button.tag = [dict[@"Tag"] integerValue];
        [button setImage:dict[@"Image"]
                forState:UIControlStateNormal];
      //  [button addTarget:self action:@selector(buttonAction:)
      //   forControlEvents:UIControlEventTouchUpInside];

        [self.scrollView addSubview:button];
        //frame.origin.x+=frame.size.width+20.0f;
        cx += button.frame.size.width+5;
    }

    [scrollView setContentSize:CGSizeMake(cx, [scrollView bounds].size.height)];
}
@end

我经历了以下SO链接，但没有得到解决方案。

LINK1 LINK2 LINK3 LINK4

Answer 1

为了能够滚动，您需要保持滚动视图的视图超出屏幕范围。因此，拖动视图并将其放大到设备边界，以便它能够保存您的子视图。

Answer 2

最好使用UICollectionView来解决这类问题。它更容易实现，也可以帮助您进行所有必要的操作。

Answer 3

您的MyCustomView是UIScrollView的子类。因此，您不需要为您的班级添加UIScrollView财产。删除scrollView媒体资源，并将所有self.scrollView替换为self

UIScrollView不能使用动态UIButtons水平滚动

3 个答案: