iOS 字符串处理

// 字符串是否含有另一个字符串

+ (BOOL)string:(NSString *)string subStr:(NSString *)subStr{

    //    NSLog(@"%@---比较---%@",string,subStr);

    if ([string rangeOfString:subStr].location !=NSNotFound) {

        //条件为真，表示字符串string包含一个自字符串subStr

        returnYES;

    }else{

       //条件为假，表示不包含要检查的字符串

        returnNO ;

    }

}

//   字符串查找并替换

NSString *str = [<#字符串#> stringByReplacingOccurrencesOfString:@"\n"withString:@""];

//   数组转化为字符串

NSMutableArray *arr =@[@"冬瓜",@"西瓜",@"火龙果"].mutableCopy;

NSString *string = [arrcomponentsJoinedByString:@","];//","为分隔符

//   字符串分割成数组

 NSArray *arrb = [@"冬瓜，西瓜，火龙果，大头，小狗"componentsSeparatedByString:@"，"];