第三和其它連續UIButtons將不會出現在UIScrollView中

日安同胞的程序員，第三和其它連續UIButtons將不會出現在UIScrollView中

它一直小時了，因爲我已經嘗試解決這個問題。我打算創建一些類似於Facebook iOS應用程序的菜單視圖。問題是，我只能在UIScrollView中添加最多兩個UIButtons，第三個和其他連續的按鈕不會顯示出來。我希望你能幫助我。

這裏是代碼塊：

- (void)viewDidLoad 
{ 
[super viewDidLoad]; 
self.navigationController.navigationBarHidden = NO; 
for (int i = 0; i < colors.count; i++) { 
    CGRect frame; 
    frame.origin.x = self.scrollView.frame.size.width * i; 
    frame.origin.y = 0; 
    frame.size = self.scrollView.frame.size; 

    UIView *subview = [[UIView alloc] initWithFrame:frame]; 

    if(i == 0) 
    { 

     UIButton *button = [[UIButton buttonWithType:UIButtonTypeCustom] retain]; //Creates a UIButton 

     button.frame = CGRectMake(25, 65, 70, 70); //sets the coordinates and dimensions of UIButton 

     button.backgroundColor = [UIColor clearColor]; //sets the background color 

     [button addTarget:self action:nil forControlEvents:UIControlEventTouchUpInside]; //sets the target and action for the button 

     [button setBackgroundImage:[UIImage imageNamed:@"Message Board Icon-57.png"] forState:UIControlStateNormal]; //sets the background Image 


     [subview addSubview:button]; 
     [button release]; 

     UIButton *button2 = [[UIButton buttonWithType:UIButtonTypeCustom] retain]; //Creates a UIButton 

     button2.frame = CGRectMake(125, 175, 70, 70); //sets the coordinates and dimensions of UIButton 

     button2.backgroundColor = [UIColor clearColor]; //sets the background color 

     [button2 addTarget:self action:nil forControlEvents:UIControlEventTouchUpInside]; //sets the target and action for the button 

     [button2 setBackgroundImage:[UIImage imageNamed:@"Profile Page Icon-57.png"] forState:UIControlStateNormal]; //sets the background Image 

     [subview addSubview:button2]; 
     [button2 release]; 


     UIButton *button3 = [[UIButton buttonWithType:UIButtonTypeCustom] retain]; //Creates a UIButton 

     button3.frame = CGRectMake(125, 65, 70, 70); //sets the coordinates and dimensions of UIButton 

     button3.backgroundColor = [UIColor clearColor]; //sets the background color 

     [button3 addTarget:self action:nil forControlEvents:UIControlEventTouchUpInside]; //sets the target and action for the button 

     [button3 setBackgroundImage:[UIImage imageNamed:@"iCalendar Icon-57.png"] forState:UIControlStateNormal]; //sets the background Image 


     [subview addSubview:button3]; 
     [button3 release]; 


    } 
    [subview release]; 
} 

self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * colors.count, self.scrollView.frame.size.height); 

}

來源

2011-06-28 Paul John Parreno

當您將類型更改爲圓角矩形時，按鈕顯示出來嗎？ – dasdom

你必須添加你的UIview *子視圖到scrollView來顯示它和按鈕。只是做，[scrollview addsubview：子視圖]; –

我現在已經能夠發現問題了。在我的圖像名稱中存在一些拼寫錯誤，這導致了它們被添加到UIScrollView中的不一致性......感謝@dasdom和@iphonePlayer花時間閱讀我的關注。 –

你必須添加UIView *subview到scrollView到這一點，並按鈕就顯示出來。只是這樣做，[scrollView addSubview:subView];

來源

2011-06-28 11:17:41

感謝@iphonePlayer的提醒......我的代碼塊的問題比邏輯更具印刷性。 –

第三和其它連續UIButtons將不會出現在UIScrollView中

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