iOS 自定义UIpageControl
首先导入两个封装好的文件，在这里我的文件叫做BluePageControl.h和BluePageControl.m，继承于UIPageControl，重写了以下的方法。
BluePageControl.h：
#import ;
@interface QBluePageControl: UIPageControl
{
UIImage *_activeImage;（蓝色圆点图片）
UIImage *_inactiveImage;（白色圆点图片）
}
@end
BluePageControl.m：
#import"QBluePageControl.h"
@implementation QBluePageControl
- (id)initWithFrame:(CGRect)frame
{
self =[superinitWithFrame:frame];
_activeImage =[UIImageimageNamed:@"channel_pagecontrol_bluedot.png"];
_inactiveImage =[UIImageimageNamed:@"channel_pagecontrol_whitedot.png"];
return self;
}
- (void)updateDots
{
for (inti= 0;i< [self.subviewscount]; i++) {
UIImageView* dot = [self.subviewsobjectAtIndex:i];
if (i== self.currentPage){
dot.image = _activeImage;
}
else
dot.image = _inactiveImage;
}
}
- (void)setCurrentPage:(NSInteger)currentPage
{
[supersetCurrentPage:currentPage];
[selfupdateDots];
}
@end
使用的时候在主程序中#import "QBluePageControl.h"
创建：_pageControl =[[QBluePageControlalloc] initWithFrame];并指定_pageControl的numberOfPages和currentPage就可以实现了。
UIPageControl* pc = [[[QBluePageControlalloc alloc]initWithFrame:CGRectMake(100, 400, 120, 27)] autorelease];
pc.numberOfPages = 3;
pc.currentPage = 0;
方法二：
-(void)viewDidLoad{
[super viewDidLoad];
UIPageControl* pc =[[[UIPageControl alloc] initWithFrame:CGRectMake(100, 400, 120,27)] autorelease];
pc.numberOfPages = 3;
pc.currentPage = 0;
[pc addTarget:selfaction:@selector(pageChanged:)forControlEvents:UIControlEventValueChanged];
[self.viewaddSubview:pc];
[self pageChanged:pc];
}
-(void)pageChanged:(UIPageControl*)pc{
NSArray *subViews =pc.subviews;
for (int i = 0; i <[subViews count]; i++) {
UIView* subView = [subViewsobjectAtIndex:i];
if ([NSStringFromClass([subView class])isEqualToString:NSStringFromClass([UIImageView class])]) {
((UIImageView*)subView).image = (pc.currentPage == i ? [UIImageimageNamed:@"RedPoint.png"] : [UIImageimageNamed:@"BluePoint.png"]);
}
}
}