在子控制器中查看控制器帧大小 [英] view controller frame size in child controller
问题描述
我正在实现UIViewcontroller包含。在下面的示例中，我在root控制器中设置了childcontrollers的帧大小。子视图显示为我设置的大小，但是当我在container1中检查其边界时，它会报告与我设置的大小不同的大小。
I am implementing UIViewcontroller containment. In the example below I set the frame size of the childcontrollers in the rootcontroller. The child view appears as the size I have set, however when I check on its bounds within container1 it reports a different size to the size I set.
Rootcontroller（容器）
Rootcontroller (container)
- (void)viewDidLoad
{
[super viewDidLoad];
self.containA = [[Container1 alloc]init];
self.containB = [[Container2 alloc]init];
self.containA.view.frame = CGRectMake(50, 50,50, 50);
self.containB.view.frame = CGRectMake(50, 50, 300, 300);
[self addChildViewController:self.containA];
[self addChildViewController:self.containB];
[self.view addSubview:self.containA.view];
Container1
Container1
-(void)viewDidLoad {
[super viewDidLoad];
UIView *view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
//[self.view addSubview:view];
self.view = view;
self.view.backgroundColor = [UIColor redColor];
[view release];
NSLog(@"view dims %f %f",self.view.bounds.size.width,self.view.bounds.size.height);
}
集装箱1的控制台输出
查看dims 768.000000 1004.000000
Console output from container 1 view dims 768.000000 1004.000000
我认为这个问题与将视图框设置为UIScreen主屏幕] applicationFrame有关。因此我删除了所有这些代码，以便自动创建uiview。问题仍然存在..
I thought the issue was related to setting the view frame to UIScreen main screen]applicationFrame .So I removed all of this code so the uiview is created automatically. The issue still remains..
推荐答案
查看框架在viewDidLoad中实际上不可用;您应该将所有几何操作代码移动到viewWillAppear中。系统会破坏你在viewDidLoad中设置的任何更改，以及当它关于tom进入屏幕时。
View frames are not actually useable in viewDidLoad; you should move all of your geometry-manipulating code into viewWillAppear. The system will clobber any changes you set in viewDidLoad between there and when it's about tom come on screen.
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