事情起因是新項(xiàng)目尽超,產(chǎn)品要做雜志翻頁(yè)風(fēng)格,也不不顯示導(dǎo)航骇吭、標(biāo)簽欄橙弱、返回鍵,返回由下滑手勢(shì)出發(fā),上滑會(huì)從底部顯示足跡棘脐,也就是說(shuō)一個(gè)頁(yè)面有上下左右四個(gè)方向的手勢(shì)斜筐,本來(lái)想想覺(jué)得沒(méi)什么問(wèn)題,真寫(xiě)出來(lái)問(wèn)題百出
翻頁(yè)風(fēng)格自然而然想到UIPageViewController蛀缝,設(shè)置style為UIPageViewControllerTransitionStylePageCurl(翻頁(yè)style是不帶scrollView的顷链,自然也沒(méi)有相應(yīng)的代理之類(lèi)的)
本來(lái)以為UIPageViewController的翻頁(yè)只是簡(jiǎn)單的左右滑動(dòng),于是我加上項(xiàng)目需要的下滑和上滑手勢(shì)屈梁。結(jié)果我錯(cuò)了嗤练,除了第一頁(yè)有效,其他頁(yè)都無(wú)效在讶。目前我所了解UIPageViewController至少有兩種手勢(shì):點(diǎn)擊tap(點(diǎn)擊邊緣換頁(yè))和拖動(dòng)pan煞抬,并且pan的范圍很廣,完全擋住了滑動(dòng)手勢(shì)构哺。
那么了解到這些革答,怎樣讓新手勢(shì)和UIPageViewController自帶手勢(shì)同時(shí)相應(yīng)呢?
查了很多曙强,包括網(wǎng)上也發(fā)現(xiàn)有人UIPageViewController和UITableview手勢(shì)沖突的残拐。最后發(fā)現(xiàn)有一種方法有效:
// 同時(shí)響應(yīng)拖動(dòng)和滑動(dòng)手勢(shì)
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
? ? ? return YES;
}
這是UIGestureRecognizer手勢(shì)的一個(gè)代理方法,那么問(wèn)題來(lái)了碟嘴,既然是代理方法溪食,肯定要遵從代理才有作用,因此我給我添加的兩個(gè)新手勢(shì)加了代理娜扇,為當(dāng)前的視圖控制器错沃,無(wú)效。想了一下是因?yàn)镻ageController的拖動(dòng)手勢(shì)并沒(méi)有設(shè)置代理為當(dāng)前視圖控制器雀瓢,因此用下面方法取到相關(guān)手勢(shì)捎废,并設(shè)置代理:
for (UIGestureRecognizer *gr in _pageViewController.gestureRecognizers) {
? ? ? ? ?if ([gr isKindOfClass:[UIPanGestureRecognizer class]]) {
? ? ? ? ? ? ? ?gr.delegate = self;
? ? ? ? ?}
}
親測(cè)有效!當(dāng)我開(kāi)心的多翻了兩頁(yè)致燥,crash登疗!重新試了幾次,發(fā)現(xiàn)是在PageController的第一頁(yè)往前滑和最后一頁(yè)往后滑會(huì)崩嫌蚤,本來(lái)以為是沒(méi)有對(duì)第一頁(yè)和最后一頁(yè)就行判斷設(shè)置辐益,但是檢查了一下發(fā)現(xiàn)沒(méi)錯(cuò)。脱吱。智政。糾結(jié)一下午~~~~~
后來(lái)突然想到,UIPageViewController的手勢(shì)代理當(dāng)然是它自己箱蝠,我把它的手勢(shì)代理改了续捂,那肯定會(huì)在某些時(shí)候出問(wèn)題嘛垦垂,想通了以后,于是進(jìn)行調(diào)整牙瓢,給UIPageViewController加了一個(gè)分類(lèi)劫拗,添加了兩個(gè)方法:(第二個(gè)方法是為了去掉pageviewcontroller點(diǎn)擊邊緣換頁(yè)的手勢(shì),防止相關(guān)邊緣按鈕沖突)
#import "UIPageViewController+FSGestureDeal.h"
@implementation UIPageViewController (FSGestureDeal)
// pageViewontroller同時(shí)響應(yīng)拖動(dòng)和滑動(dòng)手勢(shì)
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
? ? ? ? return YES;
}
//解決邊緣自動(dòng)翻頁(yè)跟控件沖突的問(wèn)題
-(BOOL) gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
? ? ?if ([gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]]) {
return NO;
}
return YES;
}
@end
到此矾克,就完美解決了~
更新:最近項(xiàng)目中又遇到UIPageViewController和UITableview手勢(shì)沖突(翻頁(yè)動(dòng)畫(huà)方式中页慷,垂直方向上的沖突,如果是UITableview左滑刪除手勢(shì)沖突胁附,這種方法是解決不了的)酒繁,解決方式類(lèi)似,把下面方法替換上面的就可以了:
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]] &&
[otherGestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]) {
return NO;
}
return YES;
}