iphone - 如何在 iOS 中释放 subview

Question

这是添加 subview 的代码，我想在添加 subview 之前检查它。

numberOfViews = [[GlobalVariable sharedInstance].itemNewsDetail count];


for (int i = 0; i < numberOfViews; i++) {
    @try{
        CGFloat xOrigin = i * 320;
        CGRect frame;
        frame.size = CGSizeMake(320, 365);
        frame.origin.x = xOrigin;
        frame.origin.y = 0;

        detailVC = [[DetailScrollVC alloc]initWithNibName:@"DetailScrollVC" bundle:nil];
        detailVC.view.frame = frame;
        [detailVC loadViewByIndex:i];

        UIFont *font = detailVC.txtBodyNews.font;
        detailVC.txtBodyNews.font = [font fontWithSize:currentFontSize];
        detailVC.txtBodyNews.tag = i;

        [scrollDetail addSubview:detailVC.view];
        [scrollDetail sizeToFit];
        [detailVC.view release];
    }@catch (NSException *exception) {
        NSLog(@"ERROR HANDLING : %@",exception);
    }
}

如何检查和释放我之前已经添加的所有 subview 。

谢谢。

Answer 1

如果您想从 ScrollView 或任何其他 View 中删除 subview 而不是尝试此代码:

 numberOfViews = [[GlobalVariable sharedInstance].itemNewsDetail count];

 for (UIView *subviewElement in scrollDetail.subviews) 
 {
     [subviewElement removeFromSuperview];
 }

 for (int i = 0; i < numberOfViews; i++)
 {
     @try
     {
        CGFloat xOrigin = i * 320;
        CGRect frame;
        frame.size = CGSizeMake(320, 365);
        frame.origin.x = xOrigin;
        frame.origin.y = 0;

        detailVC = [[DetailScrollVC alloc]initWithNibName:@"DetailScrollVC" bundle:nil];
        detailVC.view.frame = frame;
        [detailVC loadViewByIndex:i];

        UIFont *font = detailVC.txtBodyNews.font;
        detailVC.txtBodyNews.font = [font fontWithSize:currentFontSize];
        detailVC.txtBodyNews.tag = i;

        [scrollDetail addSubview:detailVC.view];
        [scrollDetail sizeToFit];
        [detailVC release];
     }
     @catch (NSException *exception) {
        NSLog(@"ERROR HANDLING : %@",exception);
     }
 }

希望对您的理解有所帮助。谢谢