UIButton在方向問題

Question

我有一個按鈕，我需要找到它在不同位置的每個方向。 這裏我有

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { 
if (interfaceOrientation== UIInterfaceOrientationPortrait || interfaceOrientation== UIInterfaceOrientationPortraitDown) 
button.frame=CGRectMake(150.0f,150.0f,55.0f,55.0f); 
else 
button.frame=CGRectMake(100.0f,100.0f,55.0f,55.0f); 
return YES; 
} 

它的工作的第一旋轉，當我將iPad旋轉按鈕，再進入到另一個位置。 例如在UIInterfaceOrientationPortrait按鈕不在這裏（150.0f，150.0f，55.0f，55.0f） 我該如何解決這個問題？ 感謝您的幫助。

Answer 1

方法中參數的名稱是interfaceOrientation，但您正在檢查orientation。您應該檢查interfaceOrientation：

(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { 
    if (interfaceOrientation == UIInterfaceOrientationPortrait || interfaceOrientation == UIInterfaceOrientationPortraitDown) { 
     button.frame = CGRectMake(150.0f, 150.0f, 55.0f, 55.0f); 
    } 
    else { 
     button.frame = CGRectMake(100.0f, 100.0f, 55.0f, 55.0f); 
     return YES; 
    } 
} 

Answer 2

你檢查UIInterfaceOrientationPortrait和UIInterfaceOrientationPortraitDown

但正確的枚舉名稱是UIInterfaceOrientationPortraitUpsideDown

參見：http://developer.apple.com/library/ios/#documentation/uikit/reference/UIApplication_Class/Reference/Reference.html%23//apple_ref/c/tdef/UIInterfaceOrientation

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { 
if (interfaceOrientation== UIInterfaceOrientationPortrait || interfaceOrientation== UIInterfaceOrientationPortraitUpsideDown) 
button.frame=CGRectMake(150.0f,150.0f,55.0f,55.0f); 
else 
button.frame=CGRectMake(100.0f,100.0f,55.0f,55.0f); 
return YES; 
}