duoshoubang/FirstLink/General/FKPageContro...

//
//  FKPageControl.m
//  FirstLink
//
//  Created by jack on 15/11/29.
//  Copyright © 2015年 FirstLink. All rights reserved.
//

#import "FKPageControl.h"

#define PER_PAGE_WIDTH 50
#define COMMON_HEIGHT 1.5
@interface FKPageControl ()

@property (nonatomic, strong) UIView *lineBgView;
@property (nonatomic, strong) UIView *actionLine;

@end

@implementation FKPageControl
- (instancetype)initWithFrame:(CGRect)frame{
    if (self = [super initWithFrame:frame]) {
        self.backgroundColor = [UIColor clearColor];
        [self addAllSubviews];
    }
    return self;
}

- (void)layoutSubviews{
    [super layoutSubviews];
    
    self.lineBgView.bounds = CGRectMake(0, 0, PER_PAGE_WIDTH * self.numberOfPages, COMMON_HEIGHT);
    self.lineBgView.center = CGPointMake(CGRectGetMidX(self.bounds), CGRectGetMidY(self.bounds));
    
    CGFloat bg_x = self.lineBgView.frame.origin.x;
    
    self.actionLine.bounds = CGRectMake(0, 0, PER_PAGE_WIDTH, COMMON_HEIGHT);
    self.actionLine.center = CGPointMake(bg_x + (0.5 + self.currentPage) * PER_PAGE_WIDTH , self.lineBgView.center.y);

}

- (void)addAllSubviews{
    [self addSubview:self.lineBgView];
    [self addSubview:self.actionLine];
}

- (void)setNumberOfPages:(NSUInteger)numberOfPages{
    _numberOfPages = numberOfPages;
    self.hidden = (_numberOfPages <= 1 ? YES : NO);
    
    [self setNeedsLayout];
    [self layoutIfNeeded];
}

- (void)setCurrentPage:(NSUInteger)currentPage{
    _currentPage = currentPage;
    
    [self setNeedsLayout];
    [self layoutIfNeeded];
}

- (void)setPageIndicatorTintColor:(UIColor *)pageIndicatorTintColor{
    self.lineBgView.backgroundColor = pageIndicatorTintColor;
}

- (void)setCurrentPageIndicatorTintColor:(UIColor *)currentPageIndicatorTintColor{
    self.actionLine.backgroundColor = currentPageIndicatorTintColor;
}

- (UIView *)lineBgView{
    if (_lineBgView == nil) {
        _lineBgView = [[UIView alloc]init];
        _lineBgView.userInteractionEnabled = NO;
        _lineBgView.backgroundColor = [UIColorFromRGB(0xffffff) colorWithAlphaComponent:0.5];
    }
    return _lineBgView;
}

- (UIView *)actionLine{
    if (_actionLine == nil) {
        _actionLine = [[UIView alloc]init];
        _actionLine.userInteractionEnabled = NO;
        _actionLine.backgroundColor = [UIColor whiteColor];
    }
    return _actionLine;
}
@end