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2023-08-18 17:28:57 +08:00
commit f0e8a1709d
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+//  代码地址: https://github.com/CoderMJLee/MJRefresh
+#import <UIKit/UIKit.h>
+#import <objc/message.h>
+#import <objc/runtime.h>
+
+// 弱引用
+#define MJWeakSelf __weak typeof(self) weakSelf = self;
+
+// 日志输出
+#ifdef DEBUG
+#define MJRefreshLog(...) NSLog(__VA_ARGS__)
+#else
+#define MJRefreshLog(...)
+#endif
+
+// 过期提醒
+#define MJRefreshDeprecated(DESCRIPTION) __attribute__((deprecated(DESCRIPTION)))
+
+// 运行时objc_msgSend
+#define MJRefreshMsgSend(...) ((void (*)(void *, SEL, UIView *))objc_msgSend)(__VA_ARGS__)
+#define MJRefreshMsgTarget(target) (__bridge void *)(target)
+
+// RGB颜色
+#define MJRefreshColor(r, g, b) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]
+
+// 文字颜色
+#define MJRefreshLabelTextColor MJRefreshColor(90, 90, 90)
+
+// 字体大小
+#define MJRefreshLabelFont [UIFont boldSystemFontOfSize:14]
+
+// 常量
+UIKIT_EXTERN const CGFloat MJRefreshLabelLeftInset;
+UIKIT_EXTERN const CGFloat MJRefreshHeaderHeight;
+UIKIT_EXTERN const CGFloat MJRefreshFooterHeight;
+UIKIT_EXTERN const CGFloat MJRefreshTrailWidth;
+UIKIT_EXTERN const CGFloat MJRefreshFastAnimationDuration;
+UIKIT_EXTERN const CGFloat MJRefreshSlowAnimationDuration;
+
+
+UIKIT_EXTERN NSString *const MJRefreshKeyPathContentOffset;
+UIKIT_EXTERN NSString *const MJRefreshKeyPathContentSize;
+UIKIT_EXTERN NSString *const MJRefreshKeyPathContentInset;
+UIKIT_EXTERN NSString *const MJRefreshKeyPathPanState;
+
+UIKIT_EXTERN NSString *const MJRefreshHeaderLastUpdatedTimeKey;
+
+UIKIT_EXTERN NSString *const MJRefreshHeaderIdleText;
+UIKIT_EXTERN NSString *const MJRefreshHeaderPullingText;
+UIKIT_EXTERN NSString *const MJRefreshHeaderRefreshingText;
+
+UIKIT_EXTERN NSString *const MJRefreshTrailerIdleText;
+UIKIT_EXTERN NSString *const MJRefreshTrailerPullingText;
+
+UIKIT_EXTERN NSString *const MJRefreshAutoFooterIdleText;
+UIKIT_EXTERN NSString *const MJRefreshAutoFooterRefreshingText;
+UIKIT_EXTERN NSString *const MJRefreshAutoFooterNoMoreDataText;
+
+UIKIT_EXTERN NSString *const MJRefreshBackFooterIdleText;
+UIKIT_EXTERN NSString *const MJRefreshBackFooterPullingText;
+UIKIT_EXTERN NSString *const MJRefreshBackFooterRefreshingText;
+UIKIT_EXTERN NSString *const MJRefreshBackFooterNoMoreDataText;
+
+UIKIT_EXTERN NSString *const MJRefreshHeaderLastTimeText;
+UIKIT_EXTERN NSString *const MJRefreshHeaderDateTodayText;
+UIKIT_EXTERN NSString *const MJRefreshHeaderNoneLastDateText;
+
+UIKIT_EXTERN NSString *const MJRefreshDidChangeLanguageNotification;
+
+// 状态检查
+#define MJRefreshCheckState \
+MJRefreshState oldState = self.state; \
+if (state == oldState) return; \
+[super setState:state];
+
+// 异步主线程执行，不强持有Self
+#define MJRefreshDispatchAsyncOnMainQueue(x) \
+__weak typeof(self) weakSelf = self; \
+dispatch_async(dispatch_get_main_queue(), ^{ \
+typeof(weakSelf) self = weakSelf; \
+{x} \
+});
+
+/// 替换方法实现
+/// @param _fromClass 源类
+/// @param _originSelector 源类的 Selector
+/// @param _toClass  目标类
+/// @param _newSelector 目标类的 Selector
+CG_INLINE BOOL MJRefreshExchangeImplementations(
+                                                Class _fromClass, SEL _originSelector,
+                                                Class _toClass, SEL _newSelector) {
+    if (!_fromClass || !_toClass) {
+        return NO;
+    }
+    
+    Method oriMethod = class_getInstanceMethod(_fromClass, _originSelector);
+    Method newMethod = class_getInstanceMethod(_toClass, _newSelector);
+    if (!newMethod) {
+        return NO;
+    }
+    
+    BOOL isAddedMethod = class_addMethod(_fromClass, _originSelector,
+                                         method_getImplementation(newMethod),
+                                         method_getTypeEncoding(newMethod));
+    if (isAddedMethod) {
+        // 如果 class_addMethod 成功了，说明之前 fromClass 里并不存在 originSelector，所以要用一个空的方法代替它，以避免 class_replaceMethod 后，后续 toClass 的这个方法被调用时可能会 crash
+        IMP emptyIMP = imp_implementationWithBlock(^(id selfObject) {});
+        IMP oriMethodIMP = method_getImplementation(oriMethod) ?: emptyIMP;
+        const char *oriMethodTypeEncoding = method_getTypeEncoding(oriMethod) ?: "v@:";
+        class_replaceMethod(_toClass, _newSelector, oriMethodIMP, oriMethodTypeEncoding);
+    } else {
+        method_exchangeImplementations(oriMethod, newMethod);
+    }
+    return YES;
+}