iphone - 如何从 NSString 中获取整数的数字？

Question

我有一个类似 NSString *str = @"123" 的字符串。我想将这个字符串的数字填充到 UIPickerView 中。但是如何从这个字符串中获取数字？我添加了以下代码

- (void)pickerView:(UIPickerView *)pickerView didSelectRow: (NSInteger)row inComponent:(NSInteger)component 
{
 int number = [str intValue];
 if(component == 0)
 {

 }
 else if(component == 1)
 {

 }
 else 
 {

 }
}

Answer 1

请看这个..

NSMutableArray *arrNumbers = [[NSMutableArray] alloc] initWithCapacity:[YOURSTRING length]];

for (i=0;i<[YOURSTRING length];i++) 
{
  unichaar ch = [YOURSTRING characterAtIndex:i];
  NSLog(@"Processing charachter %c",ch);
  // If you really want
  [arrNumbers addObject:(id)ch];
}