【移動(dòng)應(yīng)用開發(fā)技術(shù)】iOS導(dǎo)航欄封裝.runtime屬性的示例分析

UIViewController+YINNav效果/upload/information/20200623/126/118952.gif@interface

UIViewController

(YINNav)

/**

控制屏幕方向

在appdelegate

實(shí)現(xiàn)

-

(UIInterfaceOrientationMask)application:(UIApplication

*)application

supportedInterfaceOrientationsForWindow:(UIWindow

*)window{

return

[[[NSUserDefaults

standardUserDefaults]

objectForKey:@"orientation"]

integerValue];

}

*/

@property(nonatomic,assign)UIInterfaceOrientationMask

y_screenOrientation;

/**

上級(jí)控制器

可設(shè)置

手勢返回和pop的時(shí)候生效

*/

@property

(nonatomic)

UIViewController

*y_popController;

/**

是否啟用大標(biāo)題模式

僅支持iOS11

默認(rèn)為NO

。

*/

@property(nonatomic,assign)BOOL

y_largeTitleMode;

/**

隱藏nav橫線

*/

@property(nonatomic,assign)BOOL

y_navLineHidden;

/**

nav橫線

*/

@property(nonatomic,strong)UIView

*y_navLine;

/**

字體顏色

默認(rèn)為[UIColor

blackColor]

*/

@property

(nonatomic

,

strong)

UIColor

*y_navBarTextColor;

/**

背景顏色

默認(rèn)為[UIColor

whiteColor]

*/

@property

(nonatomic

,

strong)

UIColor

*y_navBarBgColor;

/**

背景圖

如果設(shè)置了背景圖

背景色無效

*/

@property

(nonatomic

,

strong)

UIImage

*y_navBarBgImg;

/**

設(shè)置對(duì)應(yīng)的y_navBarAlpha透明度

*/

@property

(nonatomic

,

assign)

CGFloat

y_navBarAlpha;

/**

navagationbar是否隱藏

默認(rèn)為不隱藏navagationbar

*/

@property

(nonatomic

,

assign)

BOOL

y_navBarHidden;

@end看下與系統(tǒng)方法的對(duì)比//進(jìn)入頁面時(shí)設(shè)置顏色：灰色

-

(void)viewWillAppear:(BOOL)animated{

[super

viewWillAppear:animated];

[self.navigationController.navigationBar

setBarTintColor:[UIColor

grayColor]];

}

//離開頁面時(shí)還原為全局設(shè)置：橙色

-

(void)viewWillDisappear:(BOOL)animated{

[super

viewWillDisappear:animated];

[self.navigationController.navigationBar

setBarTintColor:[UIColor

orangeColor]];

}-

(void)viewDidLoad

{

[super

viewDidLoad];

self.y_navBarBgColor

=

[UIColor

orangeColor];

}-

(void)viewDidLoad

{

[super

viewDidLoad];

self.y_navBarAlpha

=

0.999;//如果有漸變

不能設(shè)為1

否則會(huì)頁面會(huì)從導(dǎo)航欄下面開始布局。

self.y_navBarBgColor

=

[UIColor

orangeColor];

}

-

(void)scrollViewDidScroll:(UIScrollView

*)scrollView{

self.y_navBarAlpha

=

0.999-(scrollView.contentOffset.y/400.f);

}-

(void)viewDidLoad

{

[super

viewDidLoad];

self.y_navBarBgColor

=

[UIColor

orangeColor];

}-

(void)viewDidLoad

{

[super

viewDidLoad];

//權(quán)重高于背景色

self.y_navBarBgImg

=

[UIImage

imageNamed:@"app2"];

}-

(void)viewDidLoad

{

[super

viewDidLoad];

self.y_largeTitleMode

=

YES;

}-

(void)viewDidLoad

{

[super

viewDidLoad];

self.y_navBarHidden

=

YES;

}-

(void)viewDidLoad

{

[super

viewDidLoad];

self.

y_navLineHidden

=

YES;

}-

(void)viewDidLoad

{

[super

viewDidLoad];

//傳一個(gè)controller對(duì)象

可以是navgationcontroller

棧內(nèi)的對(duì)象

self.y_popController

=

[[YINNavAlphaViewControll