如何自动调整UIToolBar？

Question

我希望工具栏自动出现在屏幕的底部，我希望它调整宽度，以便从iPhone调整到iPad。下面的代码产生一个静态的UIToolbar，它保持在相同的位置。如何让工具栏出现在底部，以及如何根据屏幕尺寸自动调整宽度？

- (UIView*)commomOverlay 
{ 


UIView* view = [[UIView alloc] initWithFrame:CGRectMake(0,0,400,430)]; 


CGRect rect = CGRectMake(0, [[UIScreen mainScreen] bounds].size.height - 44, [[UIScreen mainScreen] bounds].size.width, 44); /* 
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) 
{ 
    rect = CGRectMake(0,0,768,1004); 
} 
UIImageView *FrameImg = [[UIImageView alloc] initWithFrame:rect]; 
[FrameImg setImage:[UIImage imageNamed:@"newGraphicOverlay.png"]]; 
FrameImg.userInteractionEnabled = YES; 
[view addSubview:FrameImg]; 
[FrameImg release];*/ 

rect = CGRectMake(0, 0, 400, 50); 



UIToolbar *myToolBar = [[UIToolbar alloc] initWithFrame:rect]; 
[myToolBar setBarStyle:UIBarStyleBlackTranslucent]; 
UIBarButtonItem *cancelButton = [[UIBarButtonItem alloc] initWithTitle:@"Finish" style:UIBarButtonItemStyleBordered target:self action:@selector(cancelButtonPressed)]; 
UIBarButtonItem *flexiSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:@selector(myFunction)]; 
mySwitch = [[UISwitch alloc] initWithFrame:CGRectMake (123,350,40,20)]; 
[mySwitch addTarget:self action:@selector(toggleFlash:) forControlEvents:UIControlEventAllTouchEvents]; 
UIBarButtonItem *switchBtn = [[UIBarButtonItem alloc] initWithCustomView:mySwitch]; 
//Order of how buttons appear or toolbar left to right. 
[myToolBar setItems:[NSArray arrayWithObjects: cancelButton, flexiSpace,switchBtn, nil] animated:YES]; 
myToolBar.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight ; 


[cancelButton release]; 
[flexiSpace release]; 
[switchBtn release]; 

[view addSubview:myToolBar]; 
return view; 


} 

Answer 1

您正在使用常数值设置它的帧。但是，您的视图的框架已经设置在这一点上，并且它不会根据您的autoresizingMask进行更改。您应该使用视图边界属性，而不是做一些事情，如：

toolbar.frame = CGRectMake(self.view.bounds.origin.x, 0, self.view.bounds.size.width, 50); 

另一种选择是定义视图约束。