UITableViewCell在设置单元格项上的文本时生成异常
我在cellForRowAtIndexPath中使用以下代码,当我在UILabel中填充数据时,它发送错误UITableViewCell在设置单元格项上的文本时生成异常,uitableview,nsdictionary,Uitableview,Nsdictionary,我在cellForRowAtIndexPath中使用以下代码,当我在UILabel中填充数据时,它发送错误 NSDictionary *benchmarkDictionary = (NSDictionary *)[benchmarkArray objectAtIndex:indexPath.row]; ((UILabel *)[cell viewWithTag:15]).text = [benchmarkDictionary objectForKey:@"benchmarkTitle"]; (
NSDictionary *benchmarkDictionary = (NSDictionary *)[benchmarkArray objectAtIndex:indexPath.row];
((UILabel *)[cell viewWithTag:15]).text = [benchmarkDictionary objectForKey:@"benchmarkTitle"];
((UILabel *)[cell viewWithTag:16]).text = [benchmarkDictionary objectForKey:@"benchmarkDescription"];
例外情况是:
-[基准objectForKey:]:发送到实例0x75d59c0的选择器无法识别
2013-03-08 16:21:39.515 Fdtrainer[2719:11303]*由于未捕获的异常“NSInvalidArgumentException”而终止应用程序,原因:'-[Benchmark objectForKey:]:未识别的选择器发送到实例0x75d59c0'
我的基准课程是:
@interface Benchmark : NSObject
@property (nonatomic, retain) NSString *bid;
@property (nonatomic, retain) NSString *benchmarkTitle;
@property (nonatomic, retain) NSString *benchmarkDescription;
-(id)initWithCoder: (NSCoder *)coder;
-(void)encodeWithCoder:(NSCoder *)encoder;
@end
@implementation Benchmark
@synthesize bid;
@synthesize benchmarkTitle;
@synthesize benchmarkDescription;
- (id) initWithCoder:(NSCoder *)coder {
self = [super init];
if(self) {
bid = [coder decodeObjectForKey:@"id"];
benchmarkTitle = [coder decodeObjectForKey:@"benchmarkTitle"];
benchmarkDescription = [coder decodeObjectForKey:@"benchmarkDescription"];
}
return self;
}
- (void) encodeWithCoder:(NSCoder *)encoder {
[encoder encodeObject:bid forKey:@"id"];
[encoder encodeObject:benchmarkTitle forKey:@"benchmarkTitle"];
[encoder encodeObject:benchmarkDescription forKey:@"benchmarkDescription"];
}
@end
我猜您以错误的方式访问您的财产: 试试这个:
@interface Benchmark : NSObject
@property (nonatomic, retain) NSString *bid;
@property (nonatomic, retain) NSString *benchmarkTitle;
@property (nonatomic, retain) NSString *benchmarkDescription;
-(id)initWithCoder: (NSCoder *)coder;
-(void)encodeWithCoder:(NSCoder *)encoder;
@end
@implementation Benchmark
@synthesize bid = _bid;
@synthesize benchmarkTitle = _benchmarkTitle;
@synthesize benchmarkDescription = _benchmarkDescription;
- (id) initWithCoder:(NSCoder *)coder {
self = [super init];
if(self) {
_bid = [coder decodeObjectForKey:@"id"];
_benchmarkTitle = [coder decodeObjectForKey:@"benchmarkTitle"];
_benchmarkDescription = [coder decodeObjectForKey:@"benchmarkDescription"];
}
return self;
}
- (void) encodeWithCoder:(NSCoder *)encoder {
[encoder encodeObject:_bid forKey:@"id"];
[encoder encodeObject:_benchmarkTitle forKey:@"benchmarkTitle"];
[encoder encodeObject:_benchmarkDescription forKey:@"benchmarkDescription"];
}
似乎下面这行代码可能会导致问题
NSDictionary *benchmarkDictionary = (NSDictionary *)[benchmarkArray objectAtIndex:indexPath.row];
您确定benchmarkArray中包含NSDictionary吗。把某样东西扔到字典里不会使它成为字典。benchmarkArray似乎包含基准对象,它属于NSObject类型,并且它们不响应objectForKey选择器