將子視圖添加到另一個子視圖不起作用

Question

我試圖在此處將標簽（headerLabel）添加到另一個子視圖（introPadTutorial），並且它沒有顯示在屏幕上。 可以幫我在哪里弄錯嗎？

//Header file

@property (nonatomic, retain) UIView *introPadTutorial;

//Implementation file

@synthesize introPadTutorial;

UIView *v = [_appDelegate getCurrentView];
CGRect tutorialFrame = [self getTableViewFrame];

introPadTutorial = [[UIView alloc] initWithFrame:CGRectMake(v.frame.size.width, 80, -tutorialFrame.size.width, v.frame.size.height)];
[introPadTutorial setBackgroundColor:[UIColor uberLightGray]];
[introPadTutorial setUserInteractionEnabled:YES];

UILabel *headerLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 180, 180)];
[headerLabel setText:@"test test test"];
[headerLabel setBackgroundColor:[UIColor greenColor]];
[headerLabel setFont:[UIFont boldSystemFontOfSize:16.0f]];
[headerLabel setTextColor:[UIColor redColor]];
[headerLabel setShadowColor:[UIColor whiteColor]];
[headerLabel setShadowOffset:CGSizeMake(0, 1)];

[self.introPadTutorial addSubview:headerLabel];
[headerLabel release];

[v addSubview:introPadTutorial];
[introPadTutorial release];

Answer 1

是否顯示introPadTutorial視圖？ 您的initWithFrame調用寬度為負數。

Answer 2

可能是你...

introPadTutorial = [[UIView alloc] initWithFrame:CGRectMake(v.frame.size.width, 80, -tutorialFrame.size.width, v.frame.size.height)];

實際上應該是...

introPadTutorial = [[UIView alloc] initWithFrame:CGRectMake(0, 80, tutorialFrame.size.width, v.frame.size.height)];

Answer 3

不要使用負寬度更改位置，而要使用原點更改位置。

用這個：

introPadTutorial = [[UIView alloc] initWithFrame:CGRectMake(v.frame.size.width - tutorialFrame.size.width, 80, tutorialFrame.size.width, v.frame.size.height)];

我認為這應該有助於使子視圖真正顯示出來。