ios – 如何在UINavigationBar中水平放置backIndicatorImage

我使用此代码将insets添加到navigaiton栏的backIndicator图像.但是,这仅适用于图像的垂直定位.
我只能将图像向上或向下移动,但不能向左或向右移动.
看起来左/右插图不起作用.我不确定可能是什么问题.

UIEdgeInsets insets = UIEdgeInsetsMake(0,20,0); //(20,0) works fine
 UIImage *backArrowImage = [[UIImage imageNamed:@"Back"] imageWithAlignmentRectInsets:insets];

 [[UINavigationBar appearance] setBackIndicatorImage:backArrowImage];
 [[UINavigationBar appearance] setBackIndicatorTransitionMaskImage:backArrowImage];

我也试过这个：

UIImage * backArrowImage =[[UIImage imageNamed:@"Back"]resizableImageWithCapInsets:UIEdgeInsetsMake(0,0) resizingMode:UIImageResizingModeStretch];

如果这不可能,我是否需要返回添加自定义后退按钮？

解决方法

我已经尝试了很多方法,最后这对我有用,你可以重绘你的照片,做如下：

UIImage *arrow = [UIImage imageNamed:@"Back_normal"];
UIGraphicsBeginImageContextWithOptions(CGSizeMake(arrow.size.width+10,arrow.size.height),NO,0); // move the pic by 10,change it to the num you want
[arrow drawAtPoint:CGPointMake(10,0)];
UIImage *finalImage = UIGraphicsGetimageFromCurrentimageContext();
UIGraphicsEndImageContext();

然后使用finalImage作为backIndicatorImage.