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iphone - 只有 iOS 7 崩溃 [NSNull intValue] : unrecognized selector sent to instance

我想从JSON服务获取数据。从JSON值获取数据时,只有iOS7版本崩溃。它从下面的JSON服务返回:{voteAverageRating=0;voteCount=0;}我的代码intvoteCount=[listDicobjectForKey:@"voteCount"]intValue];_LB_voteNumber.text=[NSStringstringWithFormat:@"(%i)",voteCount];它适用于iOS5、5.1、6.0、6.1,但它仅在iOS7版本上崩溃。它给出了这个错误:0x00098117_mh_execute_header[NSNullintVal

objective-c - NSInvalidArgumentException',原因 : '-[__NSCFString isFileURL]: unrecognized selector sent to instance 0x712e450'

我是iPhone应用程序开发的新手。当我运行一个示例项目时,我解析了一个xml提要并在表格View中显示内容和图像,我得到了这个错误-"NSInvalidArgumentException',reason:'-[__NSCFStringisFileURL]:unrecognizedselectorsenttoinstance0x712e450'"它仅在我尝试在UITableViewCell中显示图像时发生。我用于从url获取图像的代码是-if([elementNameisEqualToString:IMAGE]){NSURL*imageUrl=[attributeDictobjectF

objective-c - NSInvalidArgumentException',原因 : '-[__NSCFString isFileURL]: unrecognized selector sent to instance 0x712e450'

我是iPhone应用程序开发的新手。当我运行一个示例项目时,我解析了一个xml提要并在表格View中显示内容和图像,我得到了这个错误-"NSInvalidArgumentException',reason:'-[__NSCFStringisFileURL]:unrecognizedselectorsenttoinstance0x712e450'"它仅在我尝试在UITableViewCell中显示图像时发生。我用于从url获取图像的代码是-if([elementNameisEqualToString:IMAGE]){NSURL*imageUrl=[attributeDictobjectF

ios - [CIContext initWithOptions :]: unrecognized selector sent to instance 0x170400960 in xcode8

在ios8.3上运行,在ios9或10上运行没有这个问题。-[CIContextinitWithOptions:]:unrecognizedselectorsenttoinstance0x1704009602016-09-1918:08:21.025***Terminatingappduetouncaughtexception'NSInvalidArgumentException',reason:'-[CIContextinitWithOptions:]:unrecognizedselectorsenttoinstance0x170400960'***Firstthrowcallsta

ios - [CIContext initWithOptions :]: unrecognized selector sent to instance 0x170400960 in xcode8

在ios8.3上运行,在ios9或10上运行没有这个问题。-[CIContextinitWithOptions:]:unrecognizedselectorsenttoinstance0x1704009602016-09-1918:08:21.025***Terminatingappduetouncaughtexception'NSInvalidArgumentException',reason:'-[CIContextinitWithOptions:]:unrecognizedselectorsenttoinstance0x170400960'***Firstthrowcallsta

iphone 通知结果为 "unrecognized selector sent to instance..."

简而言之,我在ClassA(在viewDidLoad中)注册了以下NSNotification监听器:[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(playSong)name:@"playNotification"object:nil];我在ClassA.h中声明了选择器:-(void)playSong:(NSNotification*)notification;实现如下:-(void)playSong:(NSNotification*)notification{NSString*theTi

iphone 通知结果为 "unrecognized selector sent to instance..."

简而言之,我在ClassA(在viewDidLoad中)注册了以下NSNotification监听器:[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(playSong)name:@"playNotification"object:nil];我在ClassA.h中声明了选择器:-(void)playSong:(NSNotification*)notification;实现如下:-(void)playSong:(NSNotification*)notification{NSString*theTi

ios - [__NSDictionaryI setObject :forKey:]: unrecognized selector sent to instance

我正在尝试将“dateTime”添加到我的字典中,定义如下:SymptomRanking:{5111ef19253b4a9150000000=1;5111f029253b4add4e000000=1;5111f036253b4a123d000001=1;5111f045253b4a404f000000=1;}NSLog(@"dateselected:%@",[[self.datePickerdate]description])[self.resultssetObject:[[self.datePickerdate]description]forKey:@"dateTime"];应用程序

ios - [__NSDictionaryI setObject :forKey:]: unrecognized selector sent to instance

我正在尝试将“dateTime”添加到我的字典中,定义如下:SymptomRanking:{5111ef19253b4a9150000000=1;5111f029253b4add4e000000=1;5111f036253b4a123d000001=1;5111f045253b4a404f000000=1;}NSLog(@"dateselected:%@",[[self.datePickerdate]description])[self.resultssetObject:[[self.datePickerdate]description]forKey:@"dateTime"];应用程序

ios - 如何正确地将 Last-Modified header 从 HTTP 响应转换为 iOS 上的 NSDate

我正在寻找一个完全有效的解决方案,一个适用于:任何iOS地区或时区任何/大多数HTTP服务器Xcode4.0.2(seewhy)当前损坏的代码:NSStringlastModifiedString=@"Mon,06Jun201112:47:05GMT";NSDateFormatter*df=[[NSDateFormatteralloc]init];//df.dateFormat=@"EEE','ddMMMyyyyHH':'mm':'ss'GMT'";df.dateFormat=@"EEE,ddMMMyyyyHH:mm:ssz";df.locale=[[[NSLocalealloc]in