如何在iphone的可变数组中添加数字?

只能在cocoa容器中添加nsobject子类。在您的情况下,必须将整数包装在nsnumber对象中:

NSMutableArray *array = [NSMutableArray array];
for( int i = 0; i < 100; ++i )
{
   [array addObject:[NSNumber numberWithInt:i]];
}

要提取值:

int firstValue = [[array objectAtIndex:0] intValue];

使用nsnumber对象:

[NSNumber numberWithInt:1];

短期解决方案

NSMutableArray *array = [NSMutableArray array];
for( int i = 0; i < 100; ++i )
{
   [array addObject:@(i)];
}


int intValue = 10;
NSNumber *numberObj  = @(intValue);