Iphone 为什么不将此图像添加到我的滚动视图中?
为什么未将此图像添加到myIphone 为什么不将此图像添加到我的滚动视图中?,iphone,ios,objective-c,xcode,cocoa-touch,Iphone,Ios,Objective C,Xcode,Cocoa Touch,为什么未将此图像添加到myUIScrollView?将显示一个白色屏幕: UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(self.scrollView.frame.size.width * 1, 0, self.scrollView.frame.size.width, self.scrollView.frame.size.height)]; imageView.backgroundColor
UIScrollView
?将显示一个白色屏幕:
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(self.scrollView.frame.size.width * 1, 0, self.scrollView.frame.size.width, self.scrollView.frame.size.height)];
imageView.backgroundColor = [UIColor redColor];
[imageView setImage:[UIImage imageNamed:@"placeholder.png"]];
[self.scrollView addSubview:imageView];
self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * self.urlArray.count, self.scrollView.frame.size.height);
Ans还提供适当的
UIScrollView的contentSize
,并将UIScrollView
添加到您的UIView
可能是CGRectMake或OP中的问题忘记将ScView添加到UIView如果我没记错的话,是contentSize和添加UIScrollView解决了问题。我还必须将代码从viewDidload移动到ViewWillDisplay。您可以:NSLog(@“self.scrollView.frame.size.width*self.urlArray.count:%f,self.scrollView.frame.size.height:%f”,self.scrollView.frame.size.width*self.urlArray.count,self.scrollView.frame.size.height);这张照片在这里打印出来。
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, self.scrollView.frame.size.width, self.scrollView.frame.size.height)];