【移動應(yīng)用開發(fā)技術(shù)】iOS11中safeArea及iphoneX適配的示例分析

【移動應(yīng)用開發(fā)技術(shù)】iOS11中safeArea及iphoneX適配的示例分析

safeAreaLayoutGuide/upload/information/20200623/126/119655.jpg/upload/information/20200623/126/119656.jpg/upload/information/20200623/126/119657.jpg適配前后的效果/upload/information/20200623/126/119658.jpg/upload/information/20200623/126/119659.jpg/upload/information/20200623/126/119660.jpg那么非iOS11怎么辦？這樣是不是就足夠應(yīng)對所有情況了呢？safeAreaInsets/upload/information/20200623/126/119661.jpgstatic

inline

UIEdgeInsets

sgm_safeAreaInset(UIView

*view)

{

if

(@available(iOS

11.0,

*))

{

return

view.safeAreaInsets;

}

return

UIEdgeInsetsZero;

}UIEdgeInsets

safeAreaInsets

=

sgm_safeAreaInset(self.view);

CGFloat

height

=

kDefaultTopViewHeight;

//

導(dǎo)航欄原本的高度，通常是44.0

height

+=

safeAreaInsets.top

>

0

?

safeAreaInsets.top

:

20.0;

//

20.0是statusbar的高度-(void)safeAreaInsetsDidChange

API_AVAILABLE(ios(11.0),tvos(11.0));2017-10-04

16:59:59.594811+0800

XXX[15662:803767]

Begin

pushViewController

to

[<_TtCC8XXXTests27ContainerViewControllerTest20MockUIViewController:

0x7f9c07b643b0>]

viewDidLoad()Optional("pushVC")UIEdgeInsets(top:

0.0,

left:

0.0,

bottom:

0.0,

right:

0.0)

willMove(toParentViewController:)Optional("pushVC")UIEdgeInsets(top:

0.0,

left:

0.0,

bottom:

0.0,

right:

0.0)

viewWillDisappearOptional("rootVC")UIEdgeInsets(top:

44.0,

left:

0.0,

bottom:

34.0,

right:

0.0)

viewWillAppearOptional("pushVC")UIEdgeInsets(top:

0.0,

left:

0.0,

bottom:

0.0,

right:

0.0)

viewSafeAreaInsetsDidChange()Optional("pushVC")UIEdgeInsets(top:

44.0,

left:

0.0,

bottom:

34.0,

right:

0.0)

viewWillLayoutSubviews()Optional("pushVC")UIEdgeInsets(top:

44.0,

left:

0.0,

bottom:

34.0,

right:

0.0)

viewDidLayoutSubviews()Optional("pushVC")UIEdgeInsets(top:

44.0,

left:

0.0,

bottom:

34.0,

right:

0.0)

viewWillLayoutSubviews()Optional("pushVC")UIEdgeInsets(top:

44.0,

left:

0.0,

bottom:

34.0,

right:

0.0)

viewDidLayoutSubviews()Optional("pushVC")UIEdgeInsets(top:

44.0,

left:

0.0,

bottom:

34.0,

right:

0.0)

viewDidAppearOptional("pushVC")UIEdgeInsets(top:

44.0,

left:

0.0,

bottom:

34.0,

right:

0.0)

viewDidDisappearOptional("rootVC")UIEdgeInsets(top:

44.0,

left:

0.0,

bottom:

34.0,

right:

0.0)

didMove(toParentViewController:)Optional("pushVC")UIEdgeInsets(top:

44.0,

left:

0.0,

bottom:

34.0,

right:

0.0)

2017-10-04

16:59:59.604563+0800

XXX[15662:803767]

Did

PushViewController

[<_TtCC8XXXTests27ContainerViewControllerTest20MockUIViewController:

0x7f9c0790d170>]->[<_TtCC8XXXTests27ContainerViewControllerTest20MockUIViewController:

0x7f9c07b643b0>]

time

=

[0.009772]-

(void)viewDidLayoutSubviews

{

[super

viewDidLayoutSubviews];

UIEdgeInsets

safeAreaInsets

=

sgm_safeAreaInset(self.view);

CGFloat

height

=

44.0;

//

導(dǎo)航欄原本的高度，通常是44.0

height

+=

safeAreaInsets.top

>

0

?

safeAreaInsets.top

:

20.0;

//

20.0是statusbar的高度，這里假設(shè)statusbar不消失

if

(_navigationbar

&&

_navigationbar.height

!=

height)

{

_navigationbar.height

=

height;

}適配前后的效果/upload/information/20200623/126/119662.jpg適配前/upload/information/20200623/126/119663.jpg//

需求是topLeftView的top等于self.view的safeAreaLayoutGuide的top

//

使用系統(tǒng)API

if

(@available(iOS

11.0,

*))

{

[NSLayoutConstraint

constraintWithItem:self.topLeftView

attribute:NSLayoutAttributeTop

relatedBy:NSLayoutRelationEqual

toItem:self.view.safeAreaLayoutGuide

attribute:NSLayoutAttributeTop

multiplier:1.0

constant:0];

}

else

{

[NSLayoutConstraint

constraintWithItem:self.topLeftView

attribute:NSLayoutAttributeTop

relatedBy:NSLayoutRe