的UIScrollView有大量UIButtons

Question

的我要的是一个UIView有很多在它UIButtons。他们根据存储在NSArray中的数据进行放置和排列。因为有很多按钮，它们一次不能放在屏幕上。用户应该能够缩小以查看所有按钮或放大以查看详细信息（标签）并轻松选择它们。

我尝试两种不同的方法：

1）I构成的子类UIView，放在它的按钮和该视图中UIScrollview内的一个实例。

效果：我可以通过自己的标签和滚动和缩放工作正常访问所有的按钮。但我不能得到的按钮来处理任何事件（按他们）...

2）我写了一个UIViewController具有完全相同的功能，并将其实例添加到UIScrollView。

效果：我现在可以按下按钮，但滚动和缩放已停止工作。

这里查看相关代码：

- (UIView *)initWithArray:(NSArray *)nArray{ 
self = [super init]; 
if (self) {   
    int count = [nArray count]; 
    for (int i=0; i<count; i++) { 
     UIButton *button = [[UIButton alloc] 
          initWithFrame:(__some Code to place the Button__); 
     button.tag = i+1; 
     NSString *title = [[NSString alloc] initWithFormat:__code for generating Title__]; 
     [button setTitle:title forState:UIControlStateNormal]; 
     button.titleLabel.font = [UIFont systemFontOfSize:14]; 
     [button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchDown]; 
     [self addSubview:button]; 
    } 
} 
return self; 

}

，代码为matrixController：

- (void)viewDidLoad 
    { 
[super viewDidLoad]; 
    NSMutableArray *nArray = [[NSMutableArray alloc] __some code___]; 
int count = [nArray count]; 
for (int i=0; i<count; i++) { 
    UIButton *button = [[UIButton alloc] 
         initWithFrame:CGRectMake(__some Code to place the Button__]; 
    button.tag = i+1; 
    NSString *title = [[NSString alloc] initWithFormat:__code for generating Title__]; 
    [button setTitle:title forState:UIControlStateNormal]; 
    button.titleLabel.font = [UIFont systemFontOfSize:14]; 
    [button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchDown]; 
    [self.view addSubview:button]; 
} 

}

而对于ScrollViewController的代码：

UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 768, 970)]; 
    [self.view addSubview:scrollView]; 
    [scrollView setBackgroundColor:[UIColor blackColor]]; 
    //Zooming 
    [scrollView setMinimumZoomScale:0.25]; 
    [scrollView setMaximumZoomScale:4.0]; 
    [scrollView setDelegate:self]; 

    // constructing the view 
    [scrollView addSubview:chartView]; 
    [scrollView bringSubviewToFront:chartView]; 

OR

[scrollView addSubview:[matrixController view]]; 

我怎样才能得到这个工作？

Answer 1

我能够得到一个包含多个按钮平移和缩放就好了，用按钮还是处理触摸事件滚动视图：

- (void)didTapButton:(UIButton *)button 
{ 
    NSLog(@"Button %ld", (long)button.tag); 
} 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:self.view.bounds]; 
    scrollView.delegate = self; 
    scrollView.contentSize = CGSizeMake(scrollView.frame.size.width * 3.0f, scrollView.frame.size.height * 3.0f); 
    scrollView.maximumZoomScale = 3.0f; 

    UIView *zoomView = [[UIView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, scrollView.contentSize.width, scrollView.contentSize.height)]; 
    zoomView.backgroundColor = [UIColor whiteColor]; 

    for (NSInteger index = 0; index < 100; index++) 
    { 
     UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
     button.frame = CGRectMake((scrollView.frame.size.width/2.0f) - 50.0f, 10.0f + (50.0f * (CGFloat)index), 100.0f, 30.0f); 
     button.tag = index; 
     [button setTitle:[NSString stringWithFormat:@"Button %ld", ((long)index + 1)] forState:UIControlStateNormal]; 
     [button addTarget:self action:@selector(didTapButton:) forControlEvents:UIControlEventTouchUpInside]; 

     [zoomView addSubview:button]; 
    } 

    [scrollView addSubview:zoomView]; 
    [self.view addSubview:scrollView]; 
} 

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView 
{ 
    return [scrollView.subviews objectAtIndex:0]; 
} 

编辑：我说不要依赖于标签在我的评论下面，但我在这里做。 :)这仅仅是我可以记录按钮号码，所以这部分应该被忽略。

Answer 2

for (int i=0; i<10; i++) 
{ 
    UIButton *scrollingbutton_outlet = [[UIButton alloc] init]; 
    scrollingbutton_outlet = [UIButton buttonWithType:UIButtonTypeCustom]; 
    UIImage *img = [UIImage imageNamed:@"box_normal.png"]; 
    scrollingbutton_outlet.frame = CGRectMake(0, 100, img.size.width, img.size.height); 
    [scrollingbutton_outlet setTitle:[NSString stringWithFormat:@"%d",i+1] forState: UIControlStateNormal]; 
    scrollingbutton_outlet.tag=i+1; 
    [buttonArray addObject:[NSString stringWithFormat:@"%d",i+1]]; 
    buttonArray = [[NSMutableArray alloc] init]; 
    [scrollingbutton_outlet setBackgroundImage:img forState:UIControlStateNormal]; 
    [scrollingbutton_outlet addTarget:self 
           action:@selector(scrollbuttonpress:) 
         forControlEvents:UIControlEventTouchUpInside]; 

    scrollingbutton_outlet.frame = CGRectMake(img.size.width*i,0, img.size.width,  scrollviewoutlet.frame.size.height); 
    [scrollviewoutlet addSubview:scrollingbutton_outlet]; 
    width = scrollingbutton_outlet.frame.size.width; 
    height = scrollingbutton_outlet.frame.size.height; 
    scrollviewoutlet.contentSize = CGSizeMake(width*i+scrollingbutton_outlet.bounds.size.width+5, height); 
}