是否可以为每个分页点添加不同的颜色?假设我有4个点意味着可以为ios中的每个点提供4种不同的颜色吗?
答案 0 :(得分:1)
http://muthesblog.blogspot.in/2011/11/custompagecontrol.html
通过在博客中使用上述代码,您将获得不同的颜色点,如下图所示,带有黄色矩形。
为方便起见,添加代码
custompagecontrol的实现
PageControl *<pageControl> = [[[PageControl alloc] initWithFrame:f] autorelease];
<pageControl>.numberOfPages = 5;
<pageControl>.currentPage = 1;
<pageControl>.delegate = self;
[self.view addSubview:<pageControl>];
/// .h文件
#import <UIKit/UIKit.h>
@protocol PageControlDelegate;
@interface PageControl : UIView {
@private
NSInteger _currentPage;
NSInteger _numberOfPages;
UIColor *dotColorCurrentPage;
UIColor *dotColorOtherPage;
NSObject<PageControlDelegate> *delegate;
}
// Set these to control the PageControl.
@property (nonatomic) NSInteger currentPage;
@property (nonatomic) NSInteger numberOfPages;
// Customize these as well as the backgroundColor property.
@property (nonatomic, retain) UIColor *dotColorCurrentPage;
@property (nonatomic, retain) UIColor *dotColorOtherPage;
// Optional delegate for callbacks when user taps a page dot.
@property (nonatomic, assign) NSObject<PageControlDelegate> *delegate;
@end
@protocol PageControlDelegate<NSObject>
@optional
- (void)pageControlPageDidChange:(PageControl *)pageControl;
@end
//。m file
#import "PageControl.h"
// Tweak these or make them dynamic.
#define kDotDiameter 10.0
#define kDotSpacer 7.0
@implementation PageControl
@synthesize dotColorCurrentPage;
@synthesize dotColorOtherPage;
@synthesize delegate;
- (NSInteger)currentPage{
return _currentPage;
}
- (void)setCurrentPage:(NSInteger)page{
_currentPage = MIN(MAX(0, page), _numberOfPages-1);
[self setNeedsDisplay];
}
- (NSInteger)numberOfPages{
return _numberOfPages;
}
- (void)setNumberOfPages:(NSInteger)pages{
_numberOfPages = MAX(0, pages);
_currentPage = MIN(MAX(0, _currentPage), _numberOfPages-1);
[self setNeedsDisplay];
}
- (id)initWithFrame:(CGRect)frame {
if ((self = [super initWithFrame:frame]))
{
// Default colors.
self.backgroundColor = [UIColor clearColor];
self.dotColorCurrentPage = [UIColor greenColor];
self.dotColorOtherPage = [UIColor whiteColor];
}
return self;
}
- (void)drawRect:(CGRect)rect {
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetAllowsAntialiasing(context, true);
CGRect currentBounds = self.bounds;
CGFloat dotsWidth = self.numberOfPages*kDotDiameter + MAX(0, self.numberOfPages-1)*kDotSpacer;
CGFloat x = CGRectGetMidX(currentBounds)-dotsWidth/2;
CGFloat y = CGRectGetMidY(currentBounds)-kDotDiameter/2;
for (int i=0; i<_numberOfPages; i++)
{
CGRect circleRect = CGRectMake(x, y, kDotDiameter, kDotDiameter);
if (i == _currentPage)
{
CGContextSetFillColorWithColor(context, self.dotColorCurrentPage.CGColor);
}
else
{
if(i==0) {
CGContextSetFillColorWithColor(context, [UIColor magentaColor].CGColor);
} else if(i==1) {
CGContextSetFillColorWithColor(context, [UIColor orangeColor].CGColor);
} else if (i==2) {
CGContextSetFillColorWithColor(context, [UIColor yellowColor].CGColor);
} else if (i==3) {
CGContextSetFillColorWithColor(context, [UIColor whiteColor].CGColor);
} else if (i==4) {
CGContextSetFillColorWithColor(context, [UIColor blueColor].CGColor);
}
}
CGContextFillEllipseInRect(context, circleRect);
x += kDotDiameter + kDotSpacer;
}
}
- (void)dealloc {
[dotColorCurrentPage release];
[dotColorOtherPage release];
[super dealloc];
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
if (!self.delegate) return;
CGPoint touchPoint = [[[event touchesForView:self] anyObject] locationInView:self];
CGFloat dotSpanX = self.numberOfPages*(kDotDiameter + kDotSpacer);
CGFloat dotSpanY = kDotDiameter + kDotSpacer;
CGRect currentBounds = self.bounds;
CGFloat x = touchPoint.x + dotSpanX/2 - CGRectGetMidX(currentBounds);
CGFloat y = touchPoint.y + dotSpanY/2 - CGRectGetMidY(currentBounds);
if ((x<0) || (x>dotSpanX) || (y<0) || (y>dotSpanY)) return;
self.currentPage = floor(x/(kDotDiameter+kDotSpacer));
if ([self.delegate respondsToSelector:@selector(pageControlPageDidChange:)])
{
[self.delegate pageControlPageDidChange:self];
}
}
@end
答案 1 :(得分:0)
Check this below code
pageControl.pageIndicatorTintColor = [UIColor purpleColor];
pageControl.currentPageIndicatorTintColor = [UIColor magentaColor];
or Please refer this link
http://stackoverflow.com/questions/2942636/how-can-i-change-the-color-of-pagination-dots-of-uipagecontrol
答案 2 :(得分:0)
由于iOS限制,没有原生方式可以更改每个页面指示器的颜色。
但是,您可以使用以下代码更改当前所选指标的颜色以及其他指标的颜色,这可能是一个很好的折衷方案。
pageControl.pageIndicatorTintColor = [UIColor purpleColor];
pageControl.currentPageIndicatorTintColor = [UIColor magentaColor];
如果此功能对您的应用程序至关重要,我建议您创建一个符合您目的的自定义页面指示器,或者可以在线找到一个允许您执行此操作的库。
我希望能回答你的问题:)