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@wenghengcong
Last active July 11, 2019 10:41
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SDWebImage
#import <TargetConditionals.h>
#ifdef __OBJC_GC__
#error SDWebImage does not support Objective-C Garbage Collection
#endif
// Seems like TARGET_OS_MAC is always defined (on all platforms).
// To determine if we are running on macOS, use TARGET_OS_OSX in Xcode 8
#if TARGET_OS_OSX
#define SD_MAC 1
#else
#define SD_MAC 0
#endif
// iOS and tvOS are very similar, UIKit exists on both platforms
// Note: watchOS also has UIKit, but it's very limited
#if TARGET_OS_IOS || TARGET_OS_TV
#define SD_UIKIT 1
#else
#define SD_UIKIT 0
#endif
#if TARGET_OS_IOS
#define SD_IOS 1
#else
#define SD_IOS 0
#endif
#if TARGET_OS_TV
#define SD_TV 1
#else
#define SD_TV 0
#endif
#if TARGET_OS_WATCH
#define SD_WATCH 1
#else
#define SD_WATCH 0
#endif
#if SD_MAC
#import <AppKit/AppKit.h>
#ifndef UIImage
#define UIImage NSImage
#endif
#ifndef UIImageView
#define UIImageView NSImageView
#endif
#ifndef UIView
#define UIView NSView
#endif
#ifndef UIColor
#define UIColor NSColor
#endif
#else
#if SD_UIKIT
#import <UIKit/UIKit.h>
#endif
#if SD_WATCH
#import <WatchKit/WatchKit.h>
#ifndef UIView
#define UIView WKInterfaceObject
#endif
#ifndef UIImageView
#define UIImageView WKInterfaceImage
#endif
#endif
#endif
#ifndef NS_ENUM
#define NS_ENUM(_type, _name) enum _name : _type _name; enum _name : _type
#endif
#ifndef NS_OPTIONS
#define NS_OPTIONS(_type, _name) enum _name : _type _name; enum _name : _type
#endif
#ifndef dispatch_main_async_safe
#define dispatch_main_async_safe(block)\
if (dispatch_queue_get_label(DISPATCH_CURRENT_QUEUE_LABEL) == dispatch_queue_get_label(dispatch_get_main_queue())) {\
block();\
} else {\
dispatch_async(dispatch_get_main_queue(), block);\
}
#endif
// 64位整型
const int64_t SDWebImageProgressUnitCountUnknown = 1LL;
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