報錯原因:Use of undeclared identifier '_executing' / '_finished';
解決方法:在SDWebImageDownloaderOperation類的實現中添加:@synthesize executing = _executing ; @synthesize finished = _finished。
報錯原因:Use of undeclared identifier '_executing' / '_finished';
解決方法:在SDWebImageDownloaderOperation類的實現中添加:@synthesize executing = _executing ; @synthesize finished = _finished。