iphone風景模式滾動文本字段向上

我有這個功能用於在彈出鍵盤時滾動頁面上的textField，但它不適用於橫向模式。它仍然在橫向模式下朝着iPhone的頂部（如果有意義的話，它看起來像是在橫向模式下完成滾動到側面）滾動，而不是像應該那樣滾動。我將如何修改此功能以使其正確滾動並僅在橫向模式下進行滾動？我不需要它以縱向模式滾動。謝謝！iphone風景模式滾動文本字段向上

static const CGFloat KEYBOARD_ANIMATION_DURATION = 0.3; 
static const CGFloat MINIMUM_SCROLL_FRACTION = 0.2; 
static const CGFloat MAXIMUM_SCROLL_FRACTION = 0.8; 
static const CGFloat PORTRAIT_KEYBOARD_HEIGHT = 216; 
static const CGFloat LANDSCAPE_KEYBOARD_HEIGHT = 162; 

- (void)textFieldDidBeginEditing:(UITextField *)textField 
{ 
CGRect textFieldRect = 
[self.view.window convertRect:textField.bounds fromView:textField]; 
CGRect viewRect = 
[self.view.window convertRect:self.view.bounds fromView:self.view]; 

CGFloat midline = textFieldRect.origin.y + 0.5 * textFieldRect.size.height; 
CGFloat numerator = 
midline - viewRect.origin.y 
- MINIMUM_SCROLL_FRACTION * viewRect.size.height; 
CGFloat denominator = 
(MAXIMUM_SCROLL_FRACTION - MINIMUM_SCROLL_FRACTION) 
* viewRect.size.height; 
CGFloat heightFraction = numerator/denominator; 

if (heightFraction < 0.0) 
{ 
    heightFraction = 0.0; 
} 
else if (heightFraction > 1.0) 
{ 
    heightFraction = 1.0; 
} 

UIInterfaceOrientation orientation = 
[[UIApplication sharedApplication] statusBarOrientation]; 
if (orientation == UIInterfaceOrientationPortrait || 
    orientation == UIInterfaceOrientationPortraitUpsideDown) 
{ 
    animatedDistance = floor(PORTRAIT_KEYBOARD_HEIGHT * heightFraction); 
} 
else 
{ 
    NSLog(@"LANDSCAPE"); 
    animatedDistance = floor(LANDSCAPE_KEYBOARD_HEIGHT * heightFraction); 
} 


CGRect viewFrame = self.view.frame; 
viewFrame.origin.y -= animatedDistance; 

[UIView beginAnimations:nil context:NULL]; 
[UIView setAnimationBeginsFromCurrentState:YES]; 
[UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION]; 

[self.view setFrame:viewFrame]; 

[UIView commitAnimations]; 
} 

- (void)textFieldDidEndEditing:(UITextField *)textField 
{ 
CGRect viewFrame = self.view.frame; 
viewFrame.origin.y += animatedDistance; 

[UIView beginAnimations:nil context:NULL]; 
[UIView setAnimationBeginsFromCurrentState:YES]; 
[UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION]; 

[self.view setFrame:viewFrame]; 

[UIView commitAnimations]; 
}

來源

2011-08-11 Kjhhkjhkkjkjjkh Hkjhkj

沒關係！畢竟我做到了！我沒有意識到它總是在y方向上移動。我所要做的只是改變它正在移動的所有東西的方向，並在函數中添加一條if語句，這樣它只會在橫向模式下移動。 –

如果你可以用答案更新你的問題，那會很好。 – Tom

好的，我做到了。無論如何標記問題解決？ –

static const CGFloat KEYBOARD_ANIMATION_DURATION = 0.3; 
static const CGFloat MINIMUM_SCROLL_FRACTION = 0.2; 
static const CGFloat MAXIMUM_SCROLL_FRACTION = 0.8; 
static const CGFloat LANDSCAPE_KEYBOARD_HEIGHT = 162; 

- (void)textFieldDidBeginEditing:(UITextField *)textField 
{ 
UIInterfaceOrientation orientation = 
[[UIApplication sharedApplication] statusBarOrientation]; 

if (orientation == UIInterfaceOrientationLandscapeLeft || 
    orientation == UIInterfaceOrientationLandscapeRight) 
{ 

    CGRect textFieldRect = 
    [self.view.window convertRect:textField.bounds fromView:textField]; 
    CGRect viewRect = 
    [self.view.window convertRect:self.view.bounds fromView:self.view]; 

    CGFloat midline = textFieldRect.origin.y + 0.5 * textFieldRect.size.height; 
    CGFloat numerator = 
    midline - viewRect.origin.y 
    - MINIMUM_SCROLL_FRACTION * viewRect.size.height; 
    CGFloat denominator = 
    (MAXIMUM_SCROLL_FRACTION - MINIMUM_SCROLL_FRACTION) 
    * viewRect.size.height; 
    CGFloat heightFraction = numerator/denominator; 

    if (heightFraction < 0.0) 
    { 
     heightFraction = 0.0; 
    } 
    else if (heightFraction > 1.0) 
    { 
     heightFraction = 1.0; 
    } 

    animatedDistance = floor(LANDSCAPE_KEYBOARD_HEIGHT * heightFraction); 

    CGRect viewFrame = self.view.frame; 

    if (orientation == UIInterfaceOrientationLandscapeLeft) 
    { 
     viewFrame.origin.x -= animatedDistance; 
    } 
    if (orientation == UIInterfaceOrientationLandscapeRight) 
    { 
     viewFrame.origin.x += animatedDistance; 
    } 

    [UIView beginAnimations:nil context:NULL]; 
    [UIView setAnimationBeginsFromCurrentState:YES]; 
    [UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION]; 

    [self.view setFrame:viewFrame]; 
    [UIView commitAnimations]; 
} 
} 
// scrolls the view down if the view was scrolled up 
- (void)textFieldDidEndEditing:(UITextField *)textField 
{ 
UIInterfaceOrientation orientation = 
[[UIApplication sharedApplication] statusBarOrientation]; 

if (orientation == UIInterfaceOrientationLandscapeLeft || 
    orientation == UIInterfaceOrientationLandscapeRight) 
{ 
    CGRect viewFrame = self.view.frame; 

    if (orientation == UIInterfaceOrientationLandscapeLeft) 
    { 
     viewFrame.origin.x += animatedDistance; 
    } 
    if (orientation == UIInterfaceOrientationLandscapeRight) 
    { 
     viewFrame.origin.x -= animatedDistance; 
    } 

    [UIView beginAnimations:nil context:NULL]; 
    [UIView setAnimationBeginsFromCurrentState:YES]; 
    [UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION]; 

    [self.view setFrame:viewFrame]; 
    [UIView commitAnimations]; 
} 
}

來源

2011-08-13 18:29:44

iphone風景模式滾動文本字段向上

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