iOS url参数获取

NSArray *keyValues = [self.urlString componentsSeparatedByString:@"&"];
    NSMutableDictionary *dic = [[NSMutableDictionary alloc] init];
    
    for (NSString *keyValue in keyValues) {
        NSArray *arr = [keyValue componentsSeparatedByString:@"="];
        [dic setValue:arr[1] forKey:arr[0]];
    }