iphone - Objective-C Expected Identifier - 简单语法调试问题

Question

我需要帮助调试此错误预期标识符。代码是-

+(NSString *)dayOfWeek {
    NSDate *day = [NSDate date];
    NSCalendar *calendar = [NSCalendar currentCalendar];
    NSDateComponents *components = [calendar components:NSWeekdayCalendarUnit fromDate:day];
    day = [calendar dateFromComponents:components];
    NSLog(@"The DAY OF THE WEEK is -- %@", day);
    NSArray *daysOfTheWeek = [NSArray arrayWithObjects:@"Sunday", @"Monday", @"Tuesday", @"Wednesday", @"Thursday", @"Friday", @"Saturday", nil];

    NSString *dayName = [[[NSString alloc] initWithFormat:[daysOfTheWeek objectAtIndex:[[components weekday]-1]]]];
    return dayName;
}

我在 ] 下方的 -1] 处看到错误标记。

Answer 1

我认为这一行:

NSString *dayName = [[[NSString alloc] initWithFormat:[daysOfTheWeek objectAtIndex:[[components weekday]-1]]]];

应该看起来像这样:

NSString *dayName = [[NSString alloc] initWithString:[daysOfTheWeek objectAtIndex:[components weekday]-1]];

由于编译器警告，我更改了 initWithFormat。您没有替换任何内容，因此 initWithString 应该足以开始。