在iOS7中UIPageControl的改變

1. 改變：原來PageControl的subview是UIImageView，現在變成了UIView.

2. 解決辦法：重畫。

3. 代碼：（因為我的PageControl通過IB初始化的，所以下面的代碼中沒有初始化部分。你可以自行初始化）

////  CustomPageControl.m//  Sampling////  Created by Megan on 10/18/13.//  Copyright (c) 2013. All rights reserved.//#import "CustomPageControl.h"@implementation CustomPageControl- (void)setCurrentPage:(NSInteger)currentPage{    [super setCurrentPage:currentPage];    [self setNeedsDisplay];    }- (void)setNumberOfPages:(NSInteger)numberOfPages{    [super setNumberOfPages:numberOfPages];         [self setNeedsDisplay];    }- (void)drawRect:(CGRect)iRect{    int i;    CGRect rect;    UIImage *image;        iRect = self.bounds;        if (self.opaque) {        [self.backgroundColor set];        UIRectFill(iRect);    }        UIImage *_activeImage = [UIImage imageNamed:@"INDICATOR-activated.png"];    UIImage *_inactiveImage = [UIImage imageNamed:@"INDICATOR-deactivated.png"];    CGFloat _kSpacing = 5.0f;        if (self.hidesForSinglePage && self.numberOfPages == 1) {        return;    }        rect.size.height = _activeImage.size.height;    rect.size.width = self.numberOfPages * _activeImage.size.width + (self.numberOfPages - 1) * _kSpacing;    rect.origin.x = floorf((iRect.size.width - rect.size.width) / 2.0);    rect.origin.y = floorf((iRect.size.height - rect.size.height) / 2.0);    rect.size.width = _activeImage.size.width;        for (i = 0; i < self.numberOfPages; ++i) {        image = (i == self.currentPage) ? _activeImage : _inactiveImage;        [image drawInRect:rect];        rect.origin.x += _activeImage.size.width + _kSpacing;    }}@end