iOS7 UI相容 導航欄按鈕邊框 UINavigationItem left and right padding

LeexMuller發表於2013-12-03
iOSUINavigationpadding

ios7中得導航欄按鈕相對於ios7之前的版本會出現12個畫素左右的偏移，這使得很多UI不是那麼協調了。為了解決一個問題，

重寫UINavigationItem的setLeftBarButtonItem和setRightBarButtonItem方法，使之與之前版本相容；

程式碼如下：

@interface UINavigationItem (margin)

@end

@implementation UINavigationItem (margin)

if __IPHONE_OS_VERSION_MAX_ALLOWED > __IPHONE_6_1

  • (void)setLeftBarButtonItem:(UIBarButtonItem *)_leftBarButtonItem
    {
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)
    {
    UIBarButtonItem *negativeSeperator = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    negativeSeperator.width = -12;

    if (_leftBarButtonItem)
{
    [self setLeftBarButtonItems:@[negativeSeperator, _leftBarButtonItem]];
}
else
{
    [self setLeftBarButtonItems:@[negativeSeperator]];
}
[negativeSeperator release];

    }
    else
    {
    [self setLeftBarButtonItem:_leftBarButtonItem animated:NO];
    }
    }

  • (void)setRightBarButtonItem:(UIBarButtonItem *)_rightBarButtonItem
    {
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)
    {
    UIBarButtonItem *negativeSeperator = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    negativeSeperator.width = -12;

    if (_rightBarButtonItem)
{
    [self setRightBarButtonItems:@[negativeSeperator, _rightBarButtonItem]];
}
else
{
    [self setRightBarButtonItems:@[negativeSeperator]];
}
[negativeSeperator release];

    }
    else
    {
    [self setRightBarButtonItem:_rightBarButtonItem animated:NO];
    }
    }

endif

@end

專案原始碼不做任何修改，問題解決；

新增Button：

UIBarButtonItem *leftBarItem = [[UIBarButtonItem alloc] initWithCustomView:btnBack];
self.navigationItem.leftBarButtonItem = leftBarItem;
[leftBarItem release];

博文地址：http://www.cnblogs.com/maxfong/p/3375167.html

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