越来越excepected表达错误

Question

当我excuting这个代码获得异常错误在for循环我。怎么能够克服这个problem.please建议我

for (int i = [timeArray count] - 1; i >= 0; i–) { 
     int timeComponent = [[timeArray objectAtIndex:i] intValue]; 
     switch (i) { 
      case 3: 
       hours = timeComponent; 
       break; 
      case 2: 
       minutes = timeComponent; 
       break; 
      case 1: 
       seconds = timeComponent; 
       break; 
      case 0: 
       hundredths = timeComponent; 
       hundredths++; 
       break; 

      default: 
       break; 
     } 

    } 
    if (hundredths == 100) { 
     seconds++; 
     hundredths = 0; 
    } 
    else if (seconds == 60) { 
     minutes++; 
     seconds = 0; 
     minutes = 0; 
    } 
    self.hr.text = [NSString stringWithFormat:@"%.0d", hours]; 
    self.min.text = [NSString stringWithFormat:@"%.2d", minutes]; 
    } 

。 三江源提前

Answer 1

更改您的for循环

for (int i = [timeArray count] - 1; i >= 0; i-–) { 
     int timeComponent = [[timeArray objectAtIndex:i] intValue]; 

Answer 2

你不是递减的值i（异）。而你想使用递减运算符，但（i-）这不是递减运算符。所以请跟着我

for (int i = [timeArray count] - 1; i >= 0; i–-) // ----- here your problem use i-- instead of i- 
{ 
}