#import "LZJNavigationViewController.h"
#import <objc/runtime.h>
@interface LZJNavigationViewController ()<UINavigationControllerDelegate,UIGestureRecognizerDelegate>
/** 系统手势代理 */
@property (nonatomic, strong) id popGesture;
@end
@implementation LZJNavigationViewController
// 什么时候调用 当程序一启动的时候就会调用
// 作用: 将当前类加载进内存, 放在代码区
//+ (void)load{
// NSLog(@"%s",__func__);
//}
// 什么时候调用 当第一次初始这个类的时候调用
// 作用 初始化这个类
+ (void)initialize{
// NSLog(@"%s",__func__);
// 1.获取导航条标识
// 获取APP的导航条标识
// appearance 是一个协议, 只要遵守了这协议都有这方法
// 如果这样写有重大bug
// UINavigationBar *bar = [UINavigationBar appearance];
// Class 获取某几个类的导航条标识
UINavigationBar *bar = [UINavigationBar appearanceWhenContainedIn:self,nil];
// button
// [UIButton appearance];
// [UILabel appearance];
//
[bar setBackgroundImage:[UIImage imageNamed:@"NavBar64"] forBarMetrics:UIBarMetricsDefault];
// 设置字体颜色大小
NSMutableDictionary *dictM = [NSMutableDictionary dictionary];
//字体大小
dictM[NSFontAttributeName] = [UIFont boldSystemFontOfSize:22];
// 字体颜色
dictM[NSForegroundColorAttributeName] = [UIColor whiteColor];
[bar setTitleTextAttributes:dictM];
// 设置导航条前景色
[bar setTintColor:[UIColor whiteColor]];
// bar
// 获取到导航条按钮的标识
UIBarButtonItem *item = [UIBarButtonItem appearanceWhenContainedIn:self, nil];
// 修改返回按钮标题的位置
[item setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -100) forBarMetrics:UIBarMetricsDefault];
}
- (void)viewDidLoad {
[super viewDidLoad];
// 全屏滑动移除控制器
/*
<UIScreenEdgePanGestureRecognizer: 0x7ff934361e20; state = Possible; delaysTouchesBegan = YES; view = <UILayoutContainerView 0x7ff93257ace0>; target= <(action=handleNavigationTransition:, target=<_UINavigationInteractiveTransition 0x7ff934361390>)>>
(lldb)
*/
// 1.先修改系统的手势,系统没有给我们提供属性
// NSLog(@"%@",self.interactivePopGestureRecognizer);
UIScreenEdgePanGestureRecognizer *gest = self.interactivePopGestureRecognizer;
// // 2.自己添加手势
// UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handleNavigationTransition:)];
// [self.view addGestureRecognizer:pan];
// 缺Target 系统的私有属性
// KVC [gest valueForKeyPath:@""];
// 不知道 Target 真实类型
// oc runtime 机制 只能动态获取当前类的成员属性,不能获取其子类,或者父类的属性
// __unsafe_unretained Class 要获取哪个类的成员属性
// unsigned int *outCount 获取Class 下面的所有成员属性的个数
// unsigned int outCount = 0;
//
// Ivar *ivars = class_copyIvarList([UIGestureRecognizer class], &outCount);
// for (int i = 0; i<outCount; i++) {
ivars[i];
// // 获取成员属性的名字
// NSString *name = @(ivar_getName(ivars[i]));
// NSLog(@"%@",name);
//
// }
// (action=handleNavigationTransition:, target=<_UINavigationInteractiveTransition 0x7fd9db250ce0>)
// _targets
// NSArray *targets = [gest valueForKeyPath:@"_targets"];
// NSLog(@"%@",targets[0]);
//
//
// id target = [targets[0] valueForKeyPath:@"_target"];
// UIPanGestureRecognizer *pan1 = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan)];
// [self.view addGestureRecognizer:pan1];
// pan1.delegate = self;
//
id target = self.interactivePopGestureRecognizer.delegate;
//
// // 2.自己添加手势
// // 禁止系统的手势
self.interactivePopGestureRecognizer.enabled = NO;
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:target action:@selector(handleNavigationTransition:)];
// pan.enabled = NO;
[self.view addGestureRecognizer:pan];
pan.delegate = self;
}
#pragma mark - UIGestureRecognizerDelegate
// 当开始滑动的就会调用 如果返回YES ,可以滑动 返回NO,禁止手势
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer{
// 当是跟控制器不让移除(禁止), 费根控制器,允许移除控制
// NSLog(@"%ld",self.viewControllers.count);
BOOL open = self.viewControllers.count > 1;
return open;
}
//- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{
// [super pushViewController:viewController animated:animated];
//}
- (void)back{
[self popViewControllerAnimated:YES];
}
@end