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我想创建一个谓词,但得到一个error.I得到错误'NSInvalidArgumentException',原因:'无法分析格式字符串 “标题包含[CD] @%””我想是这样的:'NSInvalidArgumentException',原因:'无法解析格式字符串'标题包含[cd] @%“'错误
request.sortDescriptors = [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"title" ascending:YES selector:@selector(localizedCaseInsensitiveCompare:)]];
NSString *predicateString=[NSString stringWithFormat:@"title contains[cd] @% ",searchText];
request.predicate = [NSPredicate predicateWithFormat:predicateString];//error here
而且这样
request.sortDescriptors = [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"title" ascending:YES selector:@selector(localizedCaseInsensitiveCompare:)]];
request.predicate = [NSPredicate predicateWithFormat:@"title contains[cd] @%",searchText];//error here
你想要输出什么?你为什么放置[]方括号? – Saad
您的%符号位于@符号后面。它应该是%@,%d ... – Saad