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本文实例为大家分享了pageviewcontroller实现多视图（控制器）滑动切换的具体代码，供大家参考，具体内容如下
先看一下效果动画
类似的界面做过不少，在几个app中都有用到过，再次之前不了解uipageviewcontroller 曾经的思路有两个现在想想都觉得繁琐。
之前的思路1：使用嵌套，collectionview嵌套，每个item中添加内容
之前的思路2：使用scrollview 在上面创建一个一个的controller 实现左右滑动
这两个思路无疑是可以实现的，并且可以实现每个页面的重用，滑动等都可，唯独一点不好就是当停留在第一页的时候，点击标题栏第五页，那么平移的过程就是第一页到第五页，所有的页面从屏幕快速闪过，并且看到现在很多app都是这样的。在此之前我是用的思路2，为了避免跨页面切换出现的中间几个页面闪过的过程，直接把平移动画关闭了。直到使用了uipageviewcontroller，赶紧把项目中的给换掉了
代码不多150行以内
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#import "viewcontroller.h"/// 当前controller
#import "myviewcontroller.h" /// 复用的controller 适用于每个控制器布局相同的情况下，，布局不同就创建不同的controller添加进来
#import "titlecollectionviewcell.h"/// 标题栏使用的collectionviewcell
@interface viewcontroller ()<uipageviewcontrollerdelegate,uipageviewcontrollerdatasource,uicollectionviewdelegate,uicollectionviewdatasource>{
//// 记录当前页 当前标题位置
nsinteger ld_currentindex;
}
@property (nonatomic, strong) uipageviewcontroller *pageviewcontroller;
@property (nonatomic, strong) nsmutablearray *controllersarr;/// 控制器数组
@property (nonatomic, strong) nsmutablearray *titlearray; /// 标题数组
@property (nonatomic, strong) uicollectionview *titlecollectionview; /// 标题collectionview
@end
@implementation viewcontroller
- (void)viewdidload {
[super viewdidload];
self.view.backgroundcolor = [uicolor whitecolor];
self.navigationcontroller.navigationbar.translucent = no;
self.controllersarr = [nsmutablearray array];
self.titlearray = [nsmutablearray array];
//// 如果controller布局相同则循环创建myviewcontroller 添加进数组，，如果controller 布局不同 那就创建多个不同controller依次添加数组
for (int i = 0; i < 10; i++) {
myviewcontroller *con = [[myviewcontroller alloc]init];
[self.controllersarr addobject:con];
nsstring *str = [nsstring stringwithformat:@"第 %d 页", i+1];
con.titlestring = str;
[self.titlearray addobject:str];
}
[self createcollectionview];
[self createpageviewcontroller];
[self setthefirstpage];
}
/// 创建标题collectionview
- (void)createcollectionview{
uicollectionviewflowlayout *lay = [[uicollectionviewflowlayout alloc] init];
lay.itemsize = cgsizemake(60, 30);
lay.minimumlinespacing = 0;
lay.minimuminteritemspacing = 0;
lay.scrolldirection = uicollectionviewscrolldirectionhorizontal;
self.titlecollectionview = [[uicollectionview alloc] initwithframe:cgrectmake(0, 34, 375, 30) collectionviewlayout:lay];
self.titlecollectionview.showshorizontalscrollindicator = no;
self.titlecollectionview.backgroundcolor = [uicolor whitecolor];
self.titlecollectionview.delegate = self;
self.titlecollectionview.datasource = self;
[self.titlecollectionview registerclass:[titlecollectionviewcell class] forcellwithreuseidentifier:@"titlereuse"];
[self.navigationcontroller.view addsubview:self.titlecollectionview];
}
//// 标题collectionview的协议方法
- (nsinteger)collectionview:(uicollectionview *)collectionview numberofitemsinsection:(nsinteger)section{
return self.titlearray.count;
}
- (uicollectionviewcell *)collectionview:(uicollectionview *)collectionview cellforitematindexpath:(nsindexpath *)indexpath {
titlecollectionviewcell *cell = [collectionview dequeuereusablecellwithreuseidentifier:@"titlereuse" forindexpath:indexpath];
cell.titlelabel.text = self.titlearray[indexpath.row];
if (indexpath.row == ld_currentindex) {
cell.titlelabel.textcolor = [uicolor orangecolor];
}else{
cell.titlelabel.textcolor = [uicolor blackcolor];
}
return cell;
}
//// 点击标题左右切换视图控制器------------再也不用看到好几个中间页面从屏幕快速闪过了------
- (void)collectionview:(uicollectionview *)collectionview didselectitematindexpath:(nsindexpath *)indexpath{
uiviewcontroller *vc = [self.controllersarr objectatindex:indexpath.row];
if (indexpath.row > ld_currentindex) {
[self.pageviewcontroller setviewcontrollers:@[vc] direction:uipageviewcontrollernavigationdirectionforward animated:yes completion:^(bool finished) {
}];
} else {
[self.pageviewcontroller setviewcontrollers:@[vc] direction:uipageviewcontrollernavigationdirectionreverse animated:yes completion:^(bool finished) {
}];
}
ld_currentindex = indexpath.row;
nsindexpath *path = [nsindexpath indexpathforrow:ld_currentindex insection:0];
[self.titlecollectionview scrolltoitematindexpath:path atscrollposition:uicollectionviewscrollpositioncenteredhorizontally animated:yes];
[self.titlecollectionview reloaddata];
}
/// 创建pageviewcontroller
- (void)createpageviewcontroller {
nsdictionary *option = [nsdictionary dictionarywithobject:[nsnumber numberwithinteger:0] forkey:uipageviewcontrolleroptioninterpagespacingkey];
_pageviewcontroller = [[uipageviewcontroller alloc]initwithtransitionstyle:uipageviewcontrollertransitionstylescroll navigationorientation:uipageviewcontrollernavigationorientationhorizontal options:option];
_pageviewcontroller.delegate = self;
_pageviewcontroller.datasource = self;
[self addchildviewcontroller:_pageviewcontroller];
[self.view addsubview:_pageviewcontroller.view];
}
/// 展示上一页
- (nullable uiviewcontroller *)pageviewcontroller:(uipageviewcontroller *)pageviewcontroller viewcontrollerbeforeviewcontroller:(uiviewcontroller *)viewcontroller {
nsinteger index = [self.controllersarr indexofobject:viewcontroller];
if (index == 0 || (index == nsnotfound)) {
return nil;
}
index--;
return [self.controllersarr objectatindex:index];
}
/// 展示下一页
- (nullable uiviewcontroller *)pageviewcontroller:(uipageviewcontroller *)pageviewcontroller viewcontrollerafterviewcontroller:(uiviewcontroller *)viewcontroller {
nsinteger index = [self.controllersarr indexofobject:viewcontroller];
if (index == self.controllersarr.count - 1 || (index == nsnotfound)) {
return nil;
}
index++;
return [self.controllersarr objectatindex:index];
}
/// 将要滑动切换的时候
- (void)pageviewcontroller:(uipageviewcontroller *)pageviewcontroller willtransitiontoviewcontrollers:(nsarray<uiviewcontroller *> *)pendingviewcontrollers {
uiviewcontroller *nextvc = [pendingviewcontrollers firstobject];
nsinteger index = [self.controllersarr indexofobject:nextvc];
ld_currentindex = index;
}
/// 滑动结束后
- (void)pageviewcontroller:(uipageviewcontroller *)pageviewcontroller didfinishanimating:(bool)finished previousviewcontrollers:(nsarray<uiviewcontroller *> *)previousviewcontrollers transitioncompleted:(bool)completed {
if (completed) {
nsindexpath *path = [nsindexpath indexpathforrow:ld_currentindex insection:0];
[self.titlecollectionview scrolltoitematindexpath:path atscrollposition:uicollectionviewscrollpositioncenteredhorizontally animated:yes];
[self.titlecollectionview reloaddata];
nslog(@">>>>>>>>> %ld", (long)ld_currentindex);
}
}
/// 设置默认显示的是哪个页面（controller）
- (void)setthefirstpage{
uiviewcontroller *vc = [self.controllersarr objectatindex:ld_currentindex];
[self.pageviewcontroller setviewcontrollers:@[vc] direction:uipageviewcontrollernavigationdirectionreverse animated:yes completion:nil];
}
- (void)didreceivememorywarning {
[super didreceivememorywarning];
// dispose of any resources that can be recreated.
}
titlecollectionviewcell
@implementation titlecollectionviewcell
- (instancetype)initwithframe:(cgrect)frame{
self = [super initwithframe:frame];
if (self) {
[self createview];
}
return self;
}
- (void)createview{
self.titlelabel = [[uilabel alloc] initwithframe:cgrectmake(0, 0, self.contentview.frame.size.width, self.contentview.frame.size.height)];
[self.contentview addsubview:self.titlelabel];
self.titlelabel.font = [uifont systemfontofsize:14];
}
@end
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