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2023-08-18 17:28:57 +08:00
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+//
+//  MJRefreshNormalTrailer.h
+//  MJRefresh
+//
+//  Created by kinarobin on 2020/5/3.
+//  Copyright © 2020 小码哥. All rights reserved.
+//
+
+#if __has_include(<MJRefresh/MJRefreshStateTrailer.h>)
+#import <MJRefresh/MJRefreshStateTrailer.h>
+#else
+#import "MJRefreshStateTrailer.h"
+#endif
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface MJRefreshNormalTrailer : MJRefreshStateTrailer
+
+@property (weak, nonatomic, readonly) UIImageView *arrowView;
+
+@end
+
+NS_ASSUME_NONNULL_END
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+//
+//  MJRefreshNormalTrailer.m
+//  MJRefresh
+//
+//  Created by kinarobin on 2020/5/3.
+//  Copyright © 2020 小码哥. All rights reserved.
+//
+
+#import "MJRefreshNormalTrailer.h"
+#import "NSBundle+MJRefresh.h"
+#import "UIView+MJExtension.h"
+
+@interface MJRefreshNormalTrailer() {
+    __unsafe_unretained UIImageView *_arrowView;
+}
+@end
+
+@implementation MJRefreshNormalTrailer
+#pragma mark - 懒加载子控件
+- (UIImageView *)arrowView {
+    if (!_arrowView) {
+        UIImageView *arrowView = [[UIImageView alloc] initWithImage:[NSBundle mj_trailArrowImage]];
+        [self addSubview:_arrowView = arrowView];
+    }
+    return _arrowView;
+}
+
+- (void)placeSubviews {
+    [super placeSubviews];
+
+    CGSize arrowSize = self.arrowView.image.size;
+    // 箭头的中心点
+    CGPoint selfCenter = CGPointMake(self.mj_w * 0.5, self.mj_h * 0.5);
+    CGPoint arrowCenter = CGPointMake(arrowSize.width * 0.5 + 5, self.mj_h * 0.5);
+    BOOL stateHidden = self.stateLabel.isHidden;
+    
+    if (self.arrowView.constraints.count == 0) {
+        self.arrowView.mj_size = self.arrowView.image.size;
+        self.arrowView.center = stateHidden ?  selfCenter : arrowCenter ;
+    }
+    self.arrowView.tintColor = self.stateLabel.textColor;
+    
+    if (stateHidden) return;
+    
+    BOOL noConstrainsOnStatusLabel = self.stateLabel.constraints.count == 0;
+    CGFloat stateLabelW = ceil(self.stateLabel.font.pointSize);
+    // 状态
+    if (noConstrainsOnStatusLabel) {
+        BOOL arrowHidden = self.arrowView.isHidden;
+        CGFloat stateCenterX = (self.mj_w + arrowSize.width) * 0.5;
+        self.stateLabel.center = arrowHidden ? selfCenter : CGPointMake(stateCenterX, self.mj_h * 0.5);
+        self.stateLabel.mj_size = CGSizeMake(stateLabelW, self.mj_h) ;
+    }
+}
+
+- (void)setState:(MJRefreshState)state {
+    MJRefreshCheckState
+    // 根据状态做事情
+    if (state == MJRefreshStateIdle) {
+        if (oldState == MJRefreshStateRefreshing) {
+            [UIView animateWithDuration:self.fastAnimationDuration animations:^{
+                self.arrowView.transform = CGAffineTransformMakeRotation(M_PI);
+            } completion:^(BOOL finished) {
+                self.arrowView.transform = CGAffineTransformIdentity;
+            }];
+        } else {
+            [UIView animateWithDuration:self.fastAnimationDuration animations:^{
+                self.arrowView.transform = CGAffineTransformIdentity;
+            }];
+        }
+    } else if (state == MJRefreshStatePulling) {
+        [UIView animateWithDuration:self.fastAnimationDuration animations:^{
+            self.arrowView.transform = CGAffineTransformMakeRotation(M_PI);
+        }];
+    }
+}
+
+
+
+@end
@@ -0,0 +1,28 @@
+//
+//  MJRefreshStateTrailer.h
+//  MJRefresh
+//
+//  Created by kinarobin on 2020/5/3.
+//  Copyright © 2020 小码哥. All rights reserved.
+//
+
+#if __has_include(<MJRefresh/MJRefreshTrailer.h>)
+#import <MJRefresh/MJRefreshTrailer.h>
+#else
+#import "MJRefreshTrailer.h"
+#endif
+
+NS_ASSUME_NONNULL_BEGIN
+
+
+@interface MJRefreshStateTrailer : MJRefreshTrailer
+
+#pragma mark - 状态相关
+/** 显示刷新状态的label */
+@property (weak, nonatomic, readonly) UILabel *stateLabel;
+/** 设置state状态下的文字 */
+- (instancetype)setTitle:(NSString *)title forState:(MJRefreshState)state;
+
+@end
+
+NS_ASSUME_NONNULL_END
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+//
+//  MJRefreshStateTrailer.m
+//  MJRefresh
+//
+//  Created by kinarobin on 2020/5/3.
+//  Copyright © 2020 小码哥. All rights reserved.
+//
+
+#import "MJRefreshStateTrailer.h"
+#import "NSBundle+MJRefresh.h"
+#import "UIView+MJExtension.h"
+
+@interface MJRefreshStateTrailer() {
+    /** 显示刷新状态的label */
+    __unsafe_unretained UILabel *_stateLabel;
+}
+/** 所有状态对应的文字 */
+@property (strong, nonatomic) NSMutableDictionary *stateTitles;
+@end
+
+@implementation MJRefreshStateTrailer
+#pragma mark - 懒加载
+- (NSMutableDictionary *)stateTitles {
+    if (!_stateTitles) {
+        self.stateTitles = [NSMutableDictionary dictionary];
+    }
+    return _stateTitles;
+}
+
+- (UILabel *)stateLabel {
+    if (!_stateLabel) {
+        UILabel *stateLabel = [UILabel mj_label];
+        stateLabel.numberOfLines = 0;
+        [self addSubview:_stateLabel = stateLabel];
+    }
+    return _stateLabel;
+}
+
+#pragma mark - 公共方法
+- (instancetype)setTitle:(NSString *)title forState:(MJRefreshState)state {
+    if (title == nil) return self;
+    self.stateTitles[@(state)] = title;
+    self.stateLabel.text = self.stateTitles[@(self.state)];
+    return self;
+}
+
+- (void)textConfiguration {
+    // 初始化文字
+    [self setTitle:[NSBundle mj_localizedStringForKey:MJRefreshTrailerIdleText] forState:MJRefreshStateIdle];
+    [self setTitle:[NSBundle mj_localizedStringForKey:MJRefreshTrailerPullingText] forState:MJRefreshStatePulling];
+    [self setTitle:[NSBundle mj_localizedStringForKey:MJRefreshTrailerPullingText] forState:MJRefreshStateRefreshing];
+}
+
+#pragma mark - 覆盖父类的方法
+- (void)prepare {
+    [super prepare];
+    
+    [self textConfiguration];
+}
+
+- (void)i18nDidChange {
+    [self textConfiguration];
+    
+    [super i18nDidChange];
+}
+
+- (void)setState:(MJRefreshState)state {
+    MJRefreshCheckState
+    // 设置状态文字
+    self.stateLabel.text = self.stateTitles[@(state)];
+}
+
+- (void)placeSubviews {
+    [super placeSubviews];
+    
+    if (self.stateLabel.hidden) return;
+    
+    BOOL noConstrainsOnStatusLabel = self.stateLabel.constraints.count == 0;
+    CGFloat stateLabelW = ceil(self.stateLabel.font.pointSize);
+    // 状态
+    if (noConstrainsOnStatusLabel) {
+        self.stateLabel.center = CGPointMake(self.mj_w * 0.5, self.mj_h * 0.5);
+        self.stateLabel.mj_size = CGSizeMake(stateLabelW, self.mj_h) ;
+    }
+}
+
+@end