#define dotW 4.5

#define activeDotW 6

#define magrin 5

重寫(xiě)UIPagecontrol類(lèi)，添加下面方法根據(jù)需求修改間距

- (void)layoutSubviews

{

[super layoutSubviews];

//計(jì)算圓點(diǎn)間距

CGFloat marginX = dotW + magrin - 1;

//計(jì)算整個(gè)pageControll的寬度

CGFloat newW = (self.subviews.count - 1 ) * marginX;

//設(shè)置新frame

self.frame = CGRectMake(SCREEN_WIDTH - newW - 20, self.frame.origin.y, newW, self.frame.size.height);

//設(shè)置居中

//? ? CGPoint center = self.center;

//? ? center.x = self.superview.center.x;

//? ? self.center = center;

//遍歷subview,設(shè)置圓點(diǎn)frame

for (int i=0; i<[self.subviews count]; i++) {

UIImageView* dot = [self.subviews objectAtIndex:i];

if (i == self.currentPage) {

[dot setFrame:CGRectMake(i * marginX, dot.frame.origin.y, dotW, dotW)];

}else {

[dot setFrame:CGRectMake(i * marginX, dot.frame.origin.y, dotW, dotW)];

}

}

}