iOS 自定义状态栏和导航栏详细介绍

ios 自定义状态栏和导航栏

           开发ios app 经常会根据需求更改状态栏和导航栏，这里整理了几种方法，大家可以看下。

导航栏透明

-(void)viewwillappear:(bool)animated { //viewwillappear中设置透明
 [super viewwillappear:animated];
 [self.navigationbar setbackgroundimage:[uiimage new] forbarmetrics:uibarmetricsdefault]; //用空图片填充机位透明
 [self.navigationbar setshadowimage:[uiimage new]];//navibar底部的seperatorline
}
-(void)viewdiddisappear:(bool)animated { //viewwillappear中设置恢复
 [super viewdiddisappear:animated];
 [self.navigationbar setbackgroundimage:nil forbarmetrics:uibarmetricsdefault];
 [self.navigationbar setshadowimage:shadowimage];
}

导航栏渐变

barimageview = self.navigationcontroller.navigationbar.subviews.firstobject;
-(void)scrollviewdidscroll:(uiscrollview *)scrollview {
 cgfloat minalphaoffset = - 64;
 cgfloat maxalphaoffset = 200; 
 cgfloat offset = scrollview.contentoffset.y; 
 cgfloat alpha = (offset - minalphaoffset) / (maxalphaoffset - minalphaoffset); _barimageview.alpha = alpha;
}

状态栏字体颜色改变

[uiapplication sharedapplication].statusbarstyle = uistatusbarstyledefault;//黑色
[uiapplication sharedapplication].statusbarstyle = uistatusbarstylelightcontent;//白色

导航栏隐藏

如果导航栏自定义度高，需要完全自己重写，可以隐藏原来的导航栏，并定义一个新的view

-(void)viewwillappear:(bool)animated {
 [super viewwillappear:animated];
 self.navigationcontroller.navigationbarhidden = yes;
}
-(void)viewdiddisappear:(bool)animated {
 [super viewdiddisappear:animated];
 self.navigationcontroller.navigationbarhidden = no;
}
-(void)ys_initnavigationbar {
 self.navigationcontroller.interactivepopgesturerecognizer.delegate = (id)self; // 保留右滑pop的手势
 _navibar = [[uiview alloc] initwithframe:cgrectmake(0, 0, self.view.width, 64)];
 _navibar.backgroundcolor = [uicolor whitecolor];
 [self.view addsubview:_navibar];

uiview *line = [[uiview alloc] initwithframe:cgrectmake(0, _navibar.height-0.5, self.view.width, 0.5)];
line.backgroundcolor = [uicolor colorforhex:@"f0f0f0"];
[_navibar addsubview:line];

// 返回
backbutton = [uibutton buttonwithtype:uibuttontypecustom];
backbutton.frame = cgrectmake(0, 20, 44, 44);
[backbutton addtarget:self action:@selector(goback:) forcontrolevents:uicontroleventtouchupinside];
[self.view addsubview:backbutton];
// 标题
navilable = [[uibutton alloc] initwithframe:cgrectmake(44, 20, self.view.width-44*2, 44)];
navilable.backgroundcolor = [uicolor clearcolor];
navilable.font = [uifont systemfontofsize:16];
navilabel.textalignment = nstextalignmentcenter;
[self.view addsubview: navilable];
}
-(void)scrollviewdidscroll:(uiscrollview *)scrollview {
 //navigationbar change
 cgfloat minalphaoffset = 0;
 cgfloat maxalphaoffset = 40;
 cgfloat offset = scrollview.contentoffset.y;
 cgfloat alpha = (offset - minalphaoffset) / (maxalphaoffset - minalphaoffset);
 _navibar.alpha = alpha;
 navilabel.alpha = alpha;
}