ios疯狂详解之自定义状态栏代码解析_

1、ios疯狂详解之自定义状态栏代码解析_ 这里说明一下，apple没有开放的状态栏的api，在ios 的官方文档没有提到修改window level的方式; 先看一下window level的可用的值包括： 1: typedef cgfloat uiwindowlevel; 2: const uiwindowlevel uiwindowlevelnormal; / 0.0 3: const uiwindowlevel uiwindowlevelalert; / 2021.0 4: const uiwindowlevel uiwindowlevelstatusbar; / 1000.0 默认我们的

2、uiview layer都是在uiwindowlevelnormal上，这也就是为什么系统弹出来的对话框在我们的视图之上，由于它的window level级别更高。 依据windowlevel的原理我们也就知道，假如想在系统的状态栏上，添加自定义的状态栏，就需要比uiwindowlevelstatusbar的级别更高，接下来，用代码说明一下： 首先，先建一个single view application，名字自定义就可以了， 然后，新建一个类命名为： statusbaroverlay 继承自uiwindow类，代码： statusbaroverlay.h文件 1: #import 2: 3:

3、interface statusbaroverlay : uiwindow 4: uiview *contentview; 5: uilabel *textlabel; 6: 7: 8: property (nonatomic, retain) uiview *contentview; 9: 10: property (nonatomic, retain) uilabel *textlabel; 11: 12: end statusbaroverlay.m文件 1: / 2: / statusbaroverlay.m 3: / statusbardemo 4: / 5: / created b

4、y jordy wang on 12-8-7. 6: / copyright (c) 2021年 _mycompanyname_. all rights reserved. 7: / 8: 9: #import statusbaroverlay.h 10: 11: #define status_bar_orientation uiapplication sharedapplication.statusbarorientation 12: #define rotation_animation_duration uiapplication sharedapplication.statusbaror

5、ientationanimationduration 13: 14: 15: interface statusbaroverlay() 16: 17: - (void)initializetodefaultstate; 18: - (void)rotatestatusbarwithframe:(nsvalue *)framevalue; 19: - (void)setsubviewhframe; 20: - (void)setsubviewvframe; 21: end 22: 23: 24: implementation statusbaroverlay 25: synthesize con

6、tentview; 26: synthesize textlabel; 27: 28: /重写init方法 29: - (id)init 30: 31: self = super initwithframe:cgrectzero; 32: if (self) 33: self.windowlevel = uiwindowlevelstatusbar + 1; 34: self.frame = uiapplication sharedapplication.statusbarframe; 35: self setbackgroundcolor:uicolor orangecolor; 36: s

7、elf sethidden:no; 37: 38: /内容视图 39: uiview *_contentview = uiview alloc initwithframe:self.bounds; 40: self.contentview = _contentview; 41: self.contentview setautoresizingmask:uiviewautoresizingflexiblewidth; 42: self.contentview setbackgroundcolor:uicolor cyancolor; 43: self addsubview:self.conten

8、tview; 44: _contentview release; 45: 46: 47: /添加textlabel 48: uilabel *_textlabel = uilabel alloc initwithframe:cgrectmake(30, 0, cgrectgetwidth(self.frame)-60, cgrectgetheight(self.frame); 49: self.textlabel = _textlabel; 50: self.textlabel setbackgroundcolor:uicolor bluecolor; 51: self.textlabel s

9、etfont:uifont systemfontofsize:12; 52: self.textlabel settextalignment:uitextalignmentcenter; 53: self.textlabel settextcolor:uicolor blackcolor; 54: self.textlabel settext:自定义的状态栏 author by jordy; 55: self.contentview addsubview:self.textlabel; 56: _textlabel release; 57: 58: /注册监听-当屏幕将要转动时，所动身的大事(

10、用于操作本视图转变其frame) 59: nsnotificationcenter defaultcenter addobserver:self selector:selector(willrotatescreenevent:) name:uiapplicationwillchangestatusbarframenotification object:nil; 60: /初始化 61: self initializetodefaultstate; 62: 63: 64: return self; 65: 66: 67: 68: 69: 70: /初始化为默认状态 71: - (void)ini

11、tializetodefaultstate 72: 73: /猎取当前的状态栏位置 74: cgrect statusbarframe = uiapplication sharedapplication.statusbarframe; 75: /设置当前视图的旋转, 依据当前设备的朝向 76: self rotatestatusbarwithframe:nsvalue valuewithcgrect:statusbarframe; 77: 78: 79: 80: 81: 82: 83: /旋转屏幕 84: - (void)rotatestatusbarwithframe:(nsvalue *)

12、framevalue 85: 86: cgrect frame = framevalue cgrectvalue; 87: uiinterfaceorientation orientation = status_bar_orientation; 88: 89: if (orientation = uideviceorientationportrait) 90: self.transform = cgaffinetransformidentity; /屏幕不旋转 91: self setsubviewvframe; 92: else if (orientation = uideviceorien

13、tationportraitupsidedown) 93: self.transform = cgaffinetransformmakerotation(m_pi); /屏幕旋转180度 94: self setsubviewvframe; 95: else if (orientation = uideviceorientationlandscaperight) 96: self.transform = cgaffinetransformmakerotation(m_pi * (-90.0f) / 180.0f); /屏幕旋转-90度 97: self setsubviewhframe; 98

14、: else if (orientation = uideviceorientationlandscapeleft) 99: self.transform = cgaffinetransformmakerotation(m_pi * 90.0f / 180.0f); /屏幕旋转90度 100: self setsubviewhframe; 101: 102: 103: self.frame = frame; 104: self.contentview setframe:self.bounds; 105: 106: 107: /设置横屏的子视图的frame 108: - (void)setsub

15、viewhframe 109: 110: self.textlabel.frame = cgrectmake(30, 0, 1024-60, 20); 111: 112: /设置竖屏的子视图的frame 113: - (void)setsubviewvframe 114: 115: self.textlabel.frame = cgrectmake(30, 0, 748-60, 20); 116: 117: 118: #pragma mark - 119: #pragma mark 响应屏幕即将旋转时的大事响应 120: - (void)willrotatescreenevent:(nsnot

16、ification *)notification 121: 122: nsvalue *framevalue = notification.userinfo valueforkey:uiapplicationstatusbarframeuserinfokey; 123: self rotatestatusbaranimatedwithframe:framevalue; 124: 125: 126: - (void)rotatestatusbaranimatedwithframe:(nsvalue *)framevalue 127: uiview animatewithduration:rota

17、tion_animation_duration animations: 128: self.alpha = 0; 129: completion:(bool finished) 130: self rotatestatusbarwithframe:framevalue; 131: uiview animatewithduration:rotation_animation_duration animations: 132: self.alpha = 1; 133: ; 134: ; 135: 136: 137: - (void)dealloc 138: 139: nsnotificationce

18、nter defaultcenter removeobserver:self; 140: textlabel release; 141: textlabel = nil; 142: 143: contentview release; 144: contentview = nil; 145: 146: super dealloc; 147: 148: 149: end 由于代码比较简洁，并且我在上述代码里有相应的说明，这里需要说明一点的是，默认我们继承自uiwindow的statusbaroverlay类是hidden状态，需要在初始化的时候设置它的hidden属性为no， 在屏幕旋转过程中，自定义的状态栏与uiviewcon