通用方法解决UITextFiled输入的时候，键盘遮挡问题

我们在用键盘录入的时候，有可能会遮挡录入框，所以我们应调整UIView的位置，使其不被遮挡。我写了一个通用的方法可以解决这个问题：

- (void)moveView:(UITextField *)textField leaveView:(BOOL)leave
{
	UIView *accessoryView = textField.inputAccessoryView;
	UIView *inputview     = textField.inputView;
	
	int textFieldY = 0;
	int accessoryY = 0;
	if (accessoryView && inputview) 
	{
		CGRect accessoryRect = accessoryView.frame;
		CGRect inputViewRect = inputview.frame;
		accessoryY = 480 - (accessoryRect.size.height + inputViewRect.size.height);
	}
	else if (accessoryView)
	{
		CGRect accessoryRect = accessoryView.frame;
		accessoryY = 480 - (accessoryRect.size.height + 216);
	}
	else if (inputview)
	{
		CGRect inputViewRect = inputview.frame;
		accessoryY = 480 -inputViewRect.size.height;
	}
	else
	{
		accessoryY = 264; //480 - 216;
	}
	
	
	CGRect textFieldRect = textField.frame;
	textFieldY = textFieldRect.origin.y + textFieldRect.size.height + 20;
	
	int offsetY = textFieldY - accessoryY;
	if (!leave && offsetY > 0) 
	{
		int y_offset = -5;
		
		y_offset += -offsetY;
		
		CGRect viewFrame = self.view.frame;
		
		viewFrame.origin.y += y_offset;
		
		[UIView beginAnimations:nil context:NULL];
		[UIView setAnimationBeginsFromCurrentState:YES];
		[UIView setAnimationDuration:0.3];
		[self.view setFrame:viewFrame];
		[UIView commitAnimations];
	}
	else
	{
		CGRect viewFrame = CGRectMake(0, 20, 320, 460);
		
		[UIView beginAnimations:nil context:NULL];
		[UIView setAnimationBeginsFromCurrentState:YES];
		[UIView setAnimationDuration:0.3];
		[self.view setFrame:viewFrame];
		[UIView commitAnimations];
	}
}

用法很简单，在UITextFieldDelegate的两个方法里分别调用一下这个方法就ＯＫ了，如下示例：

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
        [self moveView:textField leaveView:NO];
}

- (void)textFieldDidEndEditing:(UITextField *)textField;
{
	[self moveView:textField leaveView:YES];
}

试一试看行不行，呵呵。欢迎交流！！！！