duoshoubang/FirstLink/Vendors/FKRefreshCon.../FKRefreshTop...

//
//  FKRefreshTopView.m
//  FKRefreshControl
//
//  Created by jack on 15/12/3.
//  Copyright © 2015年 FirstLink. All rights reserved.
//

#define RefreshCircleLineW 1.0f
#define RefreshAnimMargin 30.f
#define RefreshNoStrokeBottom 25.0f      // 下拉缓存区
#define RefreshRotationDuration 0.7f

@interface FKAnimView : UIView
@property (nonatomic, assign) CGFloat process;

@end

@implementation FKAnimView

- (void)drawRect:(CGRect)rect{
    
    [super drawRect:rect];
    
    CGFloat areaMargin = RefreshAnimMargin + RefreshCircleLineW;

    CGContextRef context = UIGraphicsGetCurrentContext();
    
    CGContextSetStrokeColorWithColor(context, UIColorFromRGB(0x444444).CGColor);
    CGContextSetLineWidth(context, RefreshCircleLineW);
    
    CGPoint center = CGPointMake(CGRectGetMidX(rect), CGRectGetMidY(rect));
    CGContextAddArc(context, center.x, center.y, areaMargin / 2.0f - RefreshCircleLineW + 1, - M_PI_2, self.process * 2 * M_PI - M_PI_2, NO);
    CGContextDrawPath(context, kCGPathStroke);
    
}

@end

#import "FKRefreshTopView.h"

#define FKRefreshTopMargin 65.0f

static NSInteger const MaxGifImageCount = 32;

@interface FKRefreshTopView ()

@property (nonatomic, strong) UIView        *containerView;
@property (nonatomic, strong) CAShapeLayer  *circleLayer;
@property (nonatomic, strong) CAShapeLayer  *bgLayer;
@property (nonatomic, strong) UIView        *coverView;

@property (nonatomic, strong) FKAnimView    *circleView;

@property (nonatomic,strong)UIImageView * imageView;
@property (nonatomic,strong)UIImageView * gifImgView;

@end

@implementation FKRefreshTopView
- (instancetype)initWithFrame:(CGRect)frame{
    if (self = [super initWithFrame:frame]) {
        [self addSubview:self.imageView];
        [self addSubview:self.gifImgView];
    }
    return self;
}

#pragma mark - FKRefreshDelegate

- (void)resetLayoutSubViews{
    // 重新布局
    
    CGFloat height = CGRectGetHeight(self.bounds);
    CGFloat width = CGRectGetWidth(self.bounds);
    if (!height || !width) return;
    
    self.imageView.bounds = CGRectMake(0, 0, 32, 32);
    self.imageView.center = CGPointMake(width / 2.0f, CGRectGetMaxY(self.bounds) - 28);
    
    self.gifImgView.center = self.imageView.center;
    self.gifImgView.bounds = self.imageView.bounds;
}


- (void)didDisengageRefreshWithOffsetY:(CGFloat)y{
//    CGFloat process = - (y + RefreshNoStrokeBottom) / (FKRefreshTopMargin - RefreshNoStrokeBottom);
//    if (process < 0) process = 0;
//    self.circleView.process = process;
    
//    [self.circleView setNeedsDisplay];
}

- (void)canEngageRefreshWithOffsetY:(CGFloat)y{
//    CGFloat process = - (y + RefreshNoStrokeBottom) / (FKRefreshTopMargin - RefreshNoStrokeBottom);
//    if (process < 0) process = 0;
//    self.circleView.process = process;
//
//    [self.circleView setNeedsDisplay];
}


- (void)startRefreshing{
    self.imageView.hidden = TRUE;
    
    self.gifImgView.hidden = FALSE;
    self.gifImgView.animationRepeatCount = 0;
    [self.gifImgView startAnimating];
}

- (void)finishRefreshing{
    self.imageView.hidden = FALSE;
    
    self.gifImgView.hidden = TRUE;
    [self.gifImgView stopAnimating];
}

#pragma mark - property

- (UIImageView *)imageView{
    if (_imageView  == nil) {
        _imageView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"imageBg"]];
    }
    return _imageView;
}

- (UIImageView *)gifImgView {
    if (!_gifImgView) {
        _gifImgView = [[UIImageView alloc] init];
        
        UIImage *image = nil;
        NSMutableArray *array = [NSMutableArray array];
        for (int idx = 1 ; idx <= MaxGifImageCount; idx++) {
            image = [UIImage imageNamed:[NSString stringWithFormat:@"pullimage%@", @(idx)]];
            if (image) {
                [array addObject:image];
            }
        }
        
        _gifImgView.animationImages = array;
        _gifImgView.animationDuration = 1.0f;
    }
    return _gifImgView;
}

- (FKAnimView *)circleView {
    if (_circleView == nil) {
        _circleView = [[FKAnimView alloc]init];
        _circleView.backgroundColor = [UIColor clearColor];
        _circleView.contentMode = UIViewContentModeRedraw;
    }
    return _circleView;
}
@end