Ios7 如何为BackBarButton的左栏按钮创建自定义UIBarButton

我正在尝试为iOS 7定制应用程序的UI。我想要的正是iOS 7的BackBarButton，但箭头和标题的颜色不同，标题的字体也不同。这是iOS 7后退按钮

我试着用下面的代码来定制它

    UIImage *backButtonImage = [UIImage imageNamed:@"back.png"];
    UIButton *customBackButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [customBackButton addTarget:self action:@selector(backButtonPressed) forControlEvents:UIControlEventTouchUpInside];
    [customBackButton setBackgroundImage:backButtonImage forState:UIControlStateNormal];
    [customBackButton setFrame:CGRectMake(0, 0, 30, 30)];       
    backButton = [[UIBarButtonItem alloc] initWithCustomView:customBackButton];
    [backButton setAction:@selector(backButtonPressed)];
    UIBarButtonItem * backButton = [[UIBarButtonItem alloc] initWithCustomView:customBackButton];

看起来是这样的：

上图有两个问题

首先，它没有向左对齐（iOS后退按钮粘贴在左侧）

第二，它没有上一页的标题

我刚刚在自定义按钮中添加了标题属性

    [customBackButton setTitle:@"title" forState:UIControlStateNormal];

但情况是这样的：

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如何解决这些问题（坚持左边和标题）？

为此，您需要一个带有箭头和标题的自定义图像。 如果您想自定义标题，只需使用以下代码>

self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"My Title" style:UIBarButtonItemStylePlain target:nil action:nil];

但是如果你想为一个图像设置，你需要一个在图像左边有后退按钮的图像

图片：

2x图像：

在编辑器中查看图像，您可以注意到图像大小为70x32，箭头更靠近左端。您还可以使用带有文本的图像&使用它

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希望有帮助

我刚刚发现这是怎么可能的

我写了下面的代码，它完美地工作了

UIBarButtonItem * backButton = [UIBarButtonItem new];
UIView * backButtonView = [UIView new];
[backButtonView setFrame:CGRectMake(0, 0, 90, 32)];

UIImageView *backButtonImage = [UIImageView new];
[backButtonImage setImage:[UIImage imageNamed:@"Setting/back.png"]];
[backButtonImage setFrame:CGRectMake(-15, 0, 30, 30)];

UILabel * backButtonLabel = [UILabel new];
[backButtonLabel setFrame:CGRectMake(8, 0, backButtonView.frame.size.width, 30)];
[backButtonLabel setBackgroundColor:[UIColor clearColor]];
[backButtonLabel setTextColor:[UIColor whiteColor]];
[backButtonLabel setTextAlignment:NSTextAlignmentLeft];
[backButtonLabel setFont:[UIFont fontWithName:@"HelveticaNeue" size:18]];
[backButtonLabel setText:title];

UIButton *customBackButton = [UIButton buttonWithType:UIButtonTypeCustom];
[customBackButton addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
[customBackButton setFrame:CGRectMake(0, 0, 90, 30)];

[backButtonView addSubview:customBackButton];
[backButtonView addSubview:backButtonImage];
[backButtonView addSubview:backButtonLabel];

backButton = [[UIBarButtonItem alloc] initWithCustomView:backButtonView];
[backButton setAction:action];
[self.navigationItem setLeftBarButtonItem:backButton animated:YES];