最近看简书时，看到一个不错的自定义UIPageControl ，小兵自己也仿写了下，自定义UIPageControl，一方面系统自带的实在太多不便了，在一方面就当练习了；

徐老茂自定义的UIPageControl.png 小兵自定义UIPagecontrol.gif

这个是自定义的UIPageControl 头文件

#import <UIKit/UIKit.h>

@interface MyPageControl : UIView

typedef enum:NSInteger
{
    /**
     默认类型:圆形
     */
    Q_PageControlStyleDefaoult = 0,
    /**
     正方形
     */
    Q_PageControlStyleSquare,

}Q_PageControlStyle;

@property(nonatomic,assign) NSInteger Q_numberPags;

@property(nonatomic,assign) NSInteger Q_currentPag;

@property(nonatomic,strong) UIColor *Q_selectionColor;

@property(nonatomic,strong) UIColor *Q_backageColor;

@property(nonatomic,assign) Q_PageControlStyle Q_pageStyle;


- (id)initWithFrame:(CGRect)frame pageStyle:(Q_PageControlStyle)pageStyle;


@end

自定义.m文件

#import "MyPageControl.h"
#define arcColor (arc4random() % 255/256.0)


@implementation MyPageControl

- (id)initWithFrame:(CGRect)frame pageStyle:(Q_PageControlStyle)pageStyle
{
    if(self = [super initWithFrame:frame])
    {

        /**
         *  默认设置
         */
        _Q_backageColor = [UIColor darkTextColor];
        _Q_selectionColor = [UIColor whiteColor];
        _Q_pageStyle = pageStyle;
        _Q_currentPag = 0;
        
    }
    return self;
}
/**
 *  设置MyPageView
 *
 *  @param Q_numberPags 
 */
- (void)setQ_numberPags:(NSInteger)Q_numberPags
{
    if(_Q_numberPags != Q_numberPags)
    {
        _Q_numberPags = Q_numberPags;
        
        CGFloat marger = 10;
        NSLog(@"%f--",self.frame.size.width);
        CGFloat width = self.frame.size.width - (Q_numberPags- 1) * marger;
        CGFloat pointWidth = width/Q_numberPags;
        
        for(int i=0;i<Q_numberPags;i++)
        {
            
            
            UIView *aView = [[UIView alloc] init];
            aView.frame = CGRectMake((marger + pointWidth) * i, 0, pointWidth, pointWidth);
            aView.backgroundColor = _Q_backageColor;
            
            switch (_Q_pageStyle) {
                case Q_PageControlStyleDefaoult:
                    aView.layer.cornerRadius = pointWidth/2;
                    aView.layer.masksToBounds = YES;
                    break;
                case Q_PageControlStyleSquare:
                    break;
                    
                default:
                    break;
            }
                      [self addSubview:aView];
            /**
             *  设置cuurrentPag
             */
            if(i == 0)
            {
                if(_Q_selectionColor)
                {
                    aView.backgroundColor = _Q_selectionColor;                
                }
                else
                {
                    aView.backgroundColor = [UIColor whiteColor];                
                }
                
            }
            
        }
        

    }
       
}
/**
 *  当前的currentPag
 *
 *  @param Q_currentPag 
 */
- (void)setQ_currentPag:(NSInteger)Q_currentPag
{

    if(_Q_currentPag != Q_currentPag)
    {
        _Q_currentPag = Q_currentPag;
        if(self.subviews.count)
        {
            for(UIView *dImg in self.subviews)
            {
                dImg.backgroundColor = _Q_backageColor;
            }
            UIView *eImg = self.subviews[_Q_currentPag];
            eImg.backgroundColor = _Q_selectionColor;
            
        }
        

    }
    

}
/**
 *  设置pag选中时的color
 *
 *  @param Q_selectionColor <#Q_selectionColor description#>
 */
- (void)setQ_selectionColor:(UIColor *)Q_selectionColor
{

    
if(_Q_selectionColor != Q_selectionColor)
{
    _Q_selectionColor = Q_selectionColor;
    if(self.subviews.count)
    {
        UIView *aimg = self.subviews[_Q_currentPag];
        aimg.backgroundColor = _Q_selectionColor;
    }
}
    
}

/**
 *  设置pag的backColor 
 *
 *  @param backgroundColor <#backgroundColor description#>
 */
- (void)setBackgroundColor:(UIColor *)backgroundColor
{

    
     
    _Q_backageColor = backgroundColor;
    if(self.subviews.count != 0)
    {
        for(UIView *aimg in self.subviews)
        {
            aimg.backgroundColor = _Q_backageColor;
        }
        UIView *bImg = self.subviews[_Q_currentPag];
        bImg.backgroundColor = _Q_selectionColor;
    }
    
}

在UIViewController中使用

- (void)viewDidLoad  
{  
    [super viewDidLoad];  
    
   
    
    scrollView  = [[UIScrollView alloc] init];
    scrollView.frame = CGRectMake(0, 0, 375, 500);
    scrollView.backgroundColor = [UIColor greenColor];
    scrollView.contentSize = CGSizeMake(375*5, 500);
    scrollView.delegate = self;
    scrollView.pagingEnabled = YES;
    scrollView.bounces = NO;
    
    for(int i=0;i<5;i++)
    {
        UIImageView *imageVeiw = [[UIImageView alloc] init];
        imageVeiw.image = [UIImage imageNamed:[NSString stringWithFormat:@"a%d",i]];
        imageVeiw.backgroundColor = [UIColor colorWithRed:arcColor green:arcColor blue:arcColor alpha:1];
        imageVeiw.frame = CGRectMake(375*i, 0, 375, 450);
        [scrollView addSubview:imageVeiw];
    }
    [self.view addSubview:scrollView];
   
  
    

    myPag = [[MyPageControl alloc] initWithFrame:CGRectMake(130,600,100, 0) pageStyle:Q_PageControlStyleSquare];
    myPag.backgroundColor = [UIColor redColor];
    myPag.Q_backageColor = [UIColor cyanColor];
    myPag.Q_selectionColor = [UIColor redColor];
    myPag.Q_numberPags = 5;

   
    
    [self.view addSubview:myPag];
}  
- (void)scrollViewDidScroll:(UIScrollView *)scrollVi
{
    CGFloat size = scrollView.contentOffset.x;

    NSInteger index = (size/scrollView.frame.size.width) + 0.5;
        NSLog(@"%f-%ld",size,index);
    myPag.Q_currentPag = index;
    
}

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