[英]Custom UIView subclass as a UIViewController property
I had thought I actually had a pretty good handle on the whole view controller model, but something just doesn't seem to making much sense for me. 我原本以为我在整个视图控制器模型上实际上有一个非常好的处理,但对我来说似乎没有什么意义。 My main issue is with adding a custom UIView subclass as a property of a UIViewController subclass.
我的主要问题是添加自定义UIView子类作为UIViewController子类的属性 。
Whenever I assign a valid instance of a UIView subclass to that property, nothing happens or the code crashes. 每当我将UIView子类的有效实例分配给该属性时,没有任何反应或代码崩溃。
Here's a quick outline: 这是一个快速概述:
addSubview:ivar
etc. No problems there... addSubview:ivar
等将这个UIView子类添加到主控制器......那里没有问题... However... if I wanted to have this custom UIView as a property of the ViewController, that does not seem to work. 但是...如果我想将这个自定义UIView作为ViewController的属性 ,那似乎不起作用。 Can anyone shed some light?
任何人都能解释一下吗?
Here's a code summary: 这是一个代码摘要:
@interface CustomUIView : UIView { }
. 。
@interface MainViewController : UIViewController {
CustomUIView *someOtherView;
}
@property (nonatomic, copy) CustomUIView *someOtherView;
... ...
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor greenColor]; // the default controller view
CustomUIView *tmpView = [[CustomUIView alloc] initWithFrame:CGRectMake(0,0,320,480)];
[self.view addSubview:tmpView]; // this works
self.someOtherView = tmpView; // this does NOT work and
self.view = self.someOtherView; // ultimately, this is what i'm after
[tmpView release];
}
Many thanks to this wonderful community! 非常感谢这个美妙的社区!
You can't copy UIView
s. 你无法复制
UIView
。 Or UIView
subclasses. 或
UIView
子类。 Try retain, instead. 请尝试保留。
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