原文:http://blog.yorkgu.me/2013/11/15/fix-position-of-leftbarbuttonitem-under-ios7/
Xcode升级到5.0版本之后,在iOS7下,通过 leftBarButtonItem 设定的左导航栏按钮会出现明显的靠右偏移的情况,就像下面图片这样:
这样的效果看起来是比较别扭的,为了让iOS7下面看起来跟以前一样,就需要针对iOS7特别处理一下了:
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UIButton
* backButton = [UIButton buttonWithType:UIButtonTypeCustom]; backButton.frame
= CGRectMake(0, 0, 60, 44); [backButton
setImage:[UIImage imageNamed:@ "back_btn_bg.png" ]
forState:UIControlStateNormal]; [backButton
setTitle:@ "Back"
forState:UIControlStateNormal]; [backButton
setTitleEdgeInsets:UIEdgeInsetsMake(-1, -55, 0, 0)]; [backButton.titleLabel
setFont:[UIFont boldSystemFontOfSize:14.0]]; [backButton
setTitleColor:[UIColor colorWithRed:233.0/255.0 green:220.0/255.0 blue:207.0/255.0 alpha:1.0] forState:UIControlStateNormal]; UIBarButtonItem
*backNavigationItem = [[UIBarButtonItem alloc] initWithCustomView:backButton]; //
调整 leftBarButtonItem 在 iOS7 下面的位置 if (([[[UIDevice
currentDevice] systemVersion] floatValue]>=7.0?20:0)){ UIBarButtonItem
*negativeSpacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target: nil
action: nil ]; negativeSpacer.width
= -10; self .navigationItem.leftBarButtonItems
= @[negativeSpacer, backNavigationItem]; } else self .navigationItem.leftBarButtonItem
= backNavigationItem; |