uibutton沒有顯示

Question

我想在imageview中添加uibutton。

但它沒有顯示按鈕。

即使我試着將它添加到uiscrollview和self.view。

但什麼也沒有顯示的UIButton

請讓我知道了什麼是問題

const CGFloat HEIGHT = 1024.0; 
    const CGFloat WIDTH = 768.0; 
    #define myViewPortrait CGRectMake(0.0f, 0.0f, 768.0f,1024.0f) 
    #define myViewLandSacpe CGRectMake(0.0f, 0.0f, 1024.0f,768.0f) 

    #define kAnimationKey @"animationKey" 


    -(void)layoutScrollImages 
    { 
     UIImageView *view = nil; 
     NSArray *subviews = [myScrollView subviews]; 

     CGFloat curXLoc = 0; 
     for (view in subviews) 
     { 
     if ([view isKindOfClass:[UIImageView class]] && view.tag > 0) 
     { 
      CGRect frame = view.frame; 
      frame.origin = CGPointMake(curXLoc, 0); 
      view.frame = frame; 

      curXLoc += (self.view.frame.size.width); 
     } 
     } 

     [myScrollView setContentSize:CGSizeMake((myImagesCount * self.view.frame.size.width), [myScrollView bounds].size.height)]; 
    } 


    // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. 
    - (void)viewDidLoad { 

     self.view.backgroundColor = [UIColor viewFlipsideBackgroundColor]; 
     myScrollView = [[UIScrollView alloc] initWithFrame: 
     CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)]; 

     [self.view addSubview:myScrollView]; 

     UISwipeGestureRecognizer *rightRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(rightSwipeHandle:)]; 
     rightRecognizer.direction = UISwipeGestureRecognizerDirectionRight; 
     rightRecognizer.numberOfTouchesRequired = 1; 
     [rightRecognizer setDelegate:self]; 
     [myScrollView addGestureRecognizer:rightRecognizer]; 
     [rightRecognizer release]; 

     UISwipeGestureRecognizer *leftRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(leftSwipeHandle:)]; 
     leftRecognizer.direction = UISwipeGestureRecognizerDirectionLeft; 
     leftRecognizer.numberOfTouchesRequired = 1; 
     [leftRecognizer setDelegate:self]; 
     [myScrollView addGestureRecognizer:leftRecognizer]; 
     [leftRecognizer release]; 

     [myScrollView setBackgroundColor:[UIColor blackColor]]; 
     [myScrollView setCanCancelContentTouches:NO]; 
     myScrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite; 
     myScrollView.clipsToBounds = YES;  
     myScrollView.scrollEnabled = YES; 
     myScrollView.pagingEnabled = YES; 
     myScrollView.delegate = self; 
     myImagesCount = 5; 
     myScrollView.showsHorizontalScrollIndicator=NO; 
     myScrollView.showsVerticalScrollIndicator=NO; 

     for (int i = 1; i <= myImagesCount; i++) 
     { 
     NSString *imageName = [NSString stringWithFormat:@"screen-%d.jpg", i]; 
     UIImage *image = [UIImage imageNamed:imageName]; 
     UIImageView *imageView = [[UIImageView alloc] initWithImage:image]; 

     CGRect rect = imageView.frame; 
     rect.size.height = myScrollView.frame.size.height; 
      NSLog(@"%d -----",self.view.frame.size.width); 
     rect.size.width = myScrollView.frame.size.width; 
     imageView.frame = rect; 
     imageView.tag = i; 
     [myScrollView addSubview:imageView]; 
     [imageView release]; 
     } 
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
    [button addTarget:self action:@selector(buttonHandler) forControlEvents:UIControlEventAllEvents]; 
    [button setTitle:@"point" forState:UIControlStateNormal]; 
    button.frame = CGRectMake(0.0, 0.0, 100.0, 40.0); 
    button.backgroundColor = [UIColor blackColor]; 
    [self.view addSubview:button]; 
     [self layoutScrollImages]; 

     [super viewDidLoad]; 

    } 

Answer 1

基於關閉您問題，你想添加UIButton作爲子ew到UIImageView - 我在for循環中猜測？我看到的直接問題是實際的按鈕是在for循環之外生成的。我認爲你的for循環意圖看起來像這樣：

for (int i = 1; i <= myImagesCount; i++) 
{ 
    NSString *imageName = [NSString stringWithFormat:@"screen-%d.jpg", i]; 
    UIImage *image = [UIImage imageNamed:imageName]; 
    UIImageView *imageView = [[UIImageView alloc] initWithImage:image]; 

    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
    [button addTarget:self action:@selector(buttonHandler) forControlEvents:UIControlEventAllEvents]; 
    [button setTitle:@"point" forState:UIControlStateNormal]; 
    button.frame = CGRectMake(0.0, 0.0, 100.0, 40.0); 
    button.backgroundColor = [UIColor blackColor]; 

    CGRect rect = imageView.frame; 
    rect.size.height = myScrollView.frame.size.height; 
    NSLog(@"%d -----",self.view.frame.size.width); 
    rect.size.width = myScrollView.frame.size.width; 
    imageView.frame = rect; 
    imageView.tag = i; 

    [imageView addSubview:button]; 
    [myScrollView addSubview:imageView]; 
    [imageView release]; 
} 

Answer 2

全球試試這個

申報按鈕，並設置

[self layoutScrollImages]; 

[self.view bringSubViewToFront:button];