// 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;
|
}
|
