我有一个函数可以从字符串转换 html 符号,然后将它们插入到 NSDictionary 中。我猜它可能是方法或语法错误。
转换html值的函数:
- (NSString *)convertMathSymbol:(NSString *)str{
str = [str stringByReplacingOccurrencesOfString:@"−" withString:@"− "];
str = [str stringByReplacingOccurrencesOfString:@"÷" withString:@"÷ "];
str = [str stringByReplacingOccurrencesOfString:@"&multiply;" withString:@"× "];
return str;
}
插入 NSDictionary:
NSString *tempAns1 = [[sample objectAtIndex:0]objectAtIndex:1];
[answer setObject:[[self convertMathSymbol:tempAns1] forKey:@"1"]];
错误:
No visible @interface for 'NSString' declares the selector 'forKey:'
欣赏任何指针......提前谢谢......