iphone - 将 View 添加到 ScrollView 中

Question

我创建了一个 ScrollView ，并在 ScrollView 上添加了两个备用自定义 UIView

@interface FirstView : UIView
@interface SecondView : UIView

我的数组是

 NSMutableArray *classArray= [[NSMutableArray alloc] initWithObjects:firstView, secondView, firstView, secondView,  nil];

我按以下方式在 ScrollView 上添加 View

for ( i = 0 ; i< 5; i++) 
{

    UIView *userView = [classArray objectAtIndex:i];
    CGRect rect;
    rect.size.height = KVIEWHGT;
    float userViewWidth = userView.frame.size.width;
    rect.size.width = userViewWidth;
    userView.frame = rect;
    [scrollView addSubview:userView];
    [userView release];

}

UIView *userView = nil;
NSArray *userSubViews = [scrollView subviews];
CGFloat x = 0;
float userViewWidth = 0.0f;
for (userView in userSubViews) {
    if ([userView isKindOfClass:[UIView class]]){
        CGRect frame = userView.frame;
        frame.origin = CGPointMake(x, 0);
        userView.frame = frame;
        userViewWidth = userView.frame.size.width;
        x += userViewWidth + 10;
    }
}

[scrollView setContentSize:CGSizeMake(x, scrollView.frame.size.height)];

我在 ScrollView 上仅获得两个自定义 View 的输出，但我希望 ScrollView 上应该有 5 个自定义 View

请帮我解决这个问题。

Answer 1

您在数组中多次添加firstView、secondView，即使您多次添加它，它引用的是同一个实例

 NSMutableArray *classArray= [[NSMutableArray alloc] initWithObjects:firstView, secondView, firstView, secondView,  nil];