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我在導航欄中有一個自定義的後退按鈕。 當鑰匙出現時,我只需用關閉按鈕替換後退按鈕。 當鍵盤關閉時,我恢復後退按鈕。導航欄按鈕上不需要的動畫
下面是我用設置在左側的導航按鈕的功能:
-(UIBarButtonItem*)configureLeftButtonWithImageName:(NSString*)imageName
target:(id)target
action:(SEL)action
{
UIButton *accountButton = [UIButton buttonWithType:UIButtonTypeCustom];
UIImage *buttImage = [UIImage imageNamed:imageName];
[accountButton setImage:buttImage forState:UIControlStateNormal];
float padding = 4;
accountButton.imageEdgeInsets = UIEdgeInsetsMake(padding, 0, padding, 2*padding);
float buttH = kNavigationButtonHeight + 2*padding;
float buttW = buttH;
if(buttImage)
{
buttW = buttH * buttImage.size.width/buttImage.size.height;
}
accountButton.bounds = CGRectMake(padding, padding, buttW, buttH);
[accountButton addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:accountButton];
[self.navigationItem setLeftBarButtonItem:barButtonItem];
return barButtonItem;
}
在這裏,我切換:
-(void)kbDidAppear
{
[self configureLeftButtonWithImageName:@"quit" target:self action:@selector(hideKb:)];
}
-(void)kbDidDisappear
{
[self configureLeftButtonWithImageName:@"back" target:self action:@selector(navigationBack:)];
}
但是,當返回按鈕被替換的退出按鈕,播放不需要的動畫:
退出按鈕出現在導航欄的左上角,然後位置被動畫到其正常值...
當我從退出按鈕切換回按鈕時,問題不出現!