我有几个视图控制器和表视图控制器,从我的根视图控制器.在所有这些中,我想在导航控制器中使用自定义后退按钮.而不是复制方法来设置我的后退按钮到每个类,文件,我已经创建了一个帮助类与类方法进行安装.下面的代码可以正常工作,但是我想知道我是否会错过这个方法.有没有更好的方式来实现这一点？此外,我仍然在我的所有类中复制 – (void)myCustomBack方法,并且想知道是否有办法避免这种情况.
@interface NavBarBackButtonSetterUpper : NSObject
+ (UIButton *)navbarSetup:(UIViewController *)callingViewController;
@end
@implementation NavBarBackButtonSetterUpper
+ (UIButton *)navbarSetup:(UIViewController *)callingViewController
{
callingViewController.navigationItem.hidesBackButton = YES;
UIImage *backButtonImage = [[UIImage imageNamed:@"back_button_textured_30"] resizableImageWithCapInsets:UIEdgeInsetsMake(0,13,5)];
UIButton *backButton = [[UIButton alloc] initWithFrame:CGRectMake(0,50,30)];
[backButton setBackgroundImage:backButtonImage forState:UIControlStateNormal];
[backButton setTitle:@"Back" forState:UIControlStateNormal];
backButton.titleLabel.font = [UIFont fontWithName:@"AmericanTypewriter-Bold" size:12];
backButton.titleLabel.shadowOffset = CGSizeMake(0,-1);
UIView *customBackView = [[UIView alloc] initWithFrame:CGRectMake(0,30)];
[customBackView addSubview:backButton];
callingViewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:customBackView];
return backButton;
}
@end
@interface MyCustomTableViewController : UITableViewController
@end
@implementation MyCustomTableViewController
- (void)viewDidLoad
{
[super viewDidLoad];
UIButton *backButton = [NavBarBackButtonSetterUpper navbarSetup:self];
[backButton addTarget:self action:@selector(myCustomBack) forControlEvents:UIControlEventTouchUpInside];
}
- (void)myCustomBack
{
[self.navigationController popViewControllerAnimated:YES];
}
@end
@interface MyCustomViewController : UIViewController
@end
@implementation MyCustomViewController
- (void)viewDidLoad
{
[super viewDidLoad];
UIButton *backButton = [NavBarBackButtonSetterUpper navbarSetup:self];
[backButton addTarget:self action:@selector(myCustomBack) forControlEvents:UIControlEventTouchUpInside];
}
- (void)myCustomBack
{
[self.navigationController popViewControllerAnimated:YES];
}
@end
