tederen_ios/smartRhino/Project/Other/Util/RefreshView/GHRefreshHeader.m

//
//  GHRefreshHeader.m
//  GameHelper
//
//  Created by 青秀斌 on 16/12/29.
//  Copyright © 2016年 kylincc. All rights reserved.
//

#import "GHRefreshHeader.h"
#import "UILabel+GHConfig.h"
#import "UIView+GHTheme.h"
#import "XLDotLoading.h"

@interface GHRefreshHeader()
@property (strong, nonatomic) UIImageView *loadingView;
@property (strong, nonatomic) UILabel *stateLabel;

@property (nonatomic, assign) CGFloat anmitationRotate;
@property (nonatomic, assign) BOOL isAnimation;
@end

@implementation GHRefreshHeader

- (void)dealloc{
    [self unObserveThemeChange];
}

- (instancetype)init {
    self = [super init];
    self.textForIdle = @"下拉即可刷新...";
    self.textForPulling = @"释放即可刷新...";
    self.textForRefreshing = @"正在刷新...";
    
    self.backgroundColor = [UIColor clearColor];
    return self;
}

+ (instancetype)headerWithRefreshingBlock:(MJRefreshComponentRefreshingBlock)refreshingBlock carRefreshBackgroundType:(CarRefreshBackgroundType)carRefreshBackgroundType
{
    GHRefreshHeader *cmp = [super headerWithRefreshingBlock:refreshingBlock];
    switch (carRefreshBackgroundType) {
        case kCarRefreshBackgroundTypeBlack:{
            cmp.textForIdle = @"";
            cmp.textForPulling = @"";
            cmp.textForRefreshing = @"";
            [cmp addSubview:cmp.carRefreshHeadView];
            [cmp.carRefreshHeadView startAnimationCarRefreshBackgroundType:kCarRefreshBackgroundTypeBlack];
        }break;
        case kCarRefreshBackgroundTypeWhite:{
            cmp.textForIdle = @"";
            cmp.textForPulling = @"";
            cmp.textForRefreshing = @"";
            [cmp addSubview:cmp.carRefreshHeadView];
            [cmp.carRefreshHeadView startAnimationCarRefreshBackgroundType:kCarRefreshBackgroundTypeWhite];
        }break;
        case kCarRefreshBackgroundTypeDoubleCircle:{
            cmp.textForIdle = @"";
            cmp.textForPulling = @"";
            cmp.textForRefreshing = @"";
            cmp.width = kScreenWidth;
            cmp.height = cmp.height + 20; 
            [XLDotLoading showInView:cmp];
        }break;
        default:{
            
        }break;
    }
    return cmp;
}

- (CarRefreshHeadView *)carRefreshHeadView{
    if(!_carRefreshHeadView){
        CarRefreshHeadView *carRefreshHeadView = [[[NSBundle mainBundle] loadNibNamed:@"CarRefreshHeadView" owner:nil options:nil] objectAtIndex:0];
        _carRefreshHeadView = carRefreshHeadView;
    }
    return _carRefreshHeadView;
}

/**********************************************************************/
#pragma mark - OverWrite
/**********************************************************************/

- (void)themeChangeAction{
    self.loadingView.image = [UIImage imageNamed:@"下拉刷新"];
    self.stateLabel.configText = @"T1";
}

/**********************************************************************/
#pragma mark - Private
/**********************************************************************/

- (void)startAnimation {
    if (self.isAnimation) {
        return;
    }
    if (self.state == MJRefreshStateRefreshing) {
        self.isAnimation = YES;
        
        __weak __typeof(self) weakSelf = self;
        CGAffineTransform angle = CGAffineTransformMakeRotation(fabs(self.anmitationRotate) *(M_PI)/45);
        [UIView animateWithDuration:0.25 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
            weakSelf.loadingView.transform = angle;
        } completion:^(BOOL finished) {
            weakSelf.anmitationRotate -= 30;
            weakSelf.isAnimation = NO;
            [weakSelf startAnimation];
        }];
    }
}

/**********************************************************************/
#pragma mark - OverWrite
/**********************************************************************/

- (void)prepare {
    [super prepare];
    self.mj_h = 50;
    self.automaticallyChangeAlpha = YES;
    
    if (self.loadingView == nil) {
        self.loadingView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"下拉刷新"]];
        [self addSubview:self.loadingView];
    }
    
    if (self.stateLabel == nil) {
        self.stateLabel = [[UILabel alloc] init];
        self.stateLabel.textAlignment = NSTextAlignmentCenter;
        self.stateLabel.font = [UIFont boldSystemFontOfSize:12];
        self.stateLabel.backgroundColor = [UIColor clearColor];
        [self addSubview:self.stateLabel];
    }
    
    [self themeChangeAction];
    [self observeThemeChange];
}

- (void)placeSubviews {
    [super placeSubviews];
    
    CGRect frame = self.bounds;
    frame.origin.x = 20;
    frame.size.width -= frame.origin.x;
    
    self.loadingView.center = CGPointMake(self.mj_w * 0.5 - 50, self.mj_h * 0.5);
    self.stateLabel.frame = frame;
    
    self.carRefreshHeadView.frame = CGRectMake(0, 0, SCREEN_WIDTH, self.height);
}

- (void)scrollViewContentOffsetDidChange:(NSDictionary *)change{
    [super scrollViewContentOffsetDidChange:change];
    
    if (self.scrollView.isDragging && self.state != MJRefreshStateRefreshing) {
        self.anmitationRotate = self.scrollView.mj_offsetY;
        CGAffineTransform angle = CGAffineTransformMakeRotation(fabs(self.anmitationRotate) *(M_PI)/45);
        self.loadingView.transform = angle;
    }
}

- (void)setState:(MJRefreshState)state {
    MJRefreshCheckState
    
    switch (state) {
        case MJRefreshStateIdle:{
            self.stateLabel.text = self.textForIdle;
        }break;
        case MJRefreshStatePulling:{
            self.stateLabel.text = self.textForPulling;
        }break;
        case MJRefreshStateRefreshing:{
            self.stateLabel.text = self.textForRefreshing;
            
            [self startAnimation];
        }break;
        default:break;
    }
}

@end