iPhone 上实现页面循环滚动

核心提示：}}//调整位置- (void)setScrollPosition{if([self isPagingEnabled] == NO){return;}if(self.dragging != NO && self.decelerating != NO){return;}int x = self.contentOffset

}

}

//调整位置

- (void)setScrollPosition

{

if([self isPagingEnabled] == NO)

{

return;

}

if(self.dragging != NO && self.decelerating != NO)

{

return;

}

int x = self.contentOffset.x;

int totalWidth = self.contentSize.width;

int perWidth = self.frame.size.width;

int minStart = 4;

int maxStart = totalWidth - perWidth - 4 ;

if(!(x minStart - perWidth) && !(x>maxStart && x < maxStart + perWidth))

{

return;

}

if(totalWidth <= perWidth*2)

{

return;//只有两个元素的情况

}

if(x < minStart || x >maxStart)

{

NSLog(@"self.contentOffset.x=%f",self.contentOffset.x);

// 进入第一步，调整 contextOff 的位置

int nx = 0;

if(x < minStart)

{

nx = x + perWidth ;

}

if(x >maxStart)

{

nx = x - perWidth;

}

CGRect rcVisable;

rcVisable.origin.x = nx;

rcVisable.origin.y = 0;

rcVisable.size = self.frame.size;

self.contentOffset = rcVisable.origin;

//第二步 整理里面元素的位置 scrollView下面的视图偏移 (有两个 scrollView 自带的视图，排除 )

//整理

NSArray* ary = [self subviews];

int arySize = [ary count];

NSMutableArray* aryOrderd = nil;//从 ary 里面的视图取出，按照当前 scrollview上从左到右再排序

if(arySize > 0 )

{

aryOrderd = [[NSMutableArray alloc] initWithCapacity:0];

}

if(aryOrderd != nil)

{

int i = 0;

//初开始化数组

for(i=0;i< p>