如何在NSMutableArray中添加整数值？ [英] How to add an integer value into NSMutableArray?

问题描述

NSMutableArray * val;
val = [[NSMutableArray alloc] initWithCapacity:15];

/*int outlineWidth = barOutlineWidth;
int outlineHalfWidth = (outlineWidth > 1) ? outlineWidth * 0.5f : 0;
 */
for ( Bar * obj in values )
{  
  // calcualte the bar size
  float value  = [obj value];
  float scale  = ( value / maxValue );

  // shift the bar to the top or bottom of the render line
  int pointY   = lineHeight + ( (lineWidth * 0.5f) * ( ( value >= 0.0f ) ? -1 : 1 ) );
  int barHeight = height * scale;
  NSLog(@"%d", barHeight);   
  CGRect barRect = CGRectMake(pointX, pointY, width, -barHeight);
  [val addObject:[NSNumber numberWithInt:barHeight]];
                     NSLog(@"%d", val);

我想将barheight（int）添加到数组val中。
这可能吗？运行代码时
，

I want to add the barheight (int) into array val. Is this possible? while running the code,

session started at 2010-09-16 13:21:50 +0530.]
2010-09-16 13:21:53.791 BarGraphSample[3168:20b] 78
2010-09-16 13:21:53.797 BarGraphSample[3168:20b] 69398112
2010-09-16 13:21:53.807 BarGraphSample[3168:20b] 235
2010-09-16 13:21:53.812 BarGraphSample[3168:20b] 69398112
2010-09-16 13:21:53.813 BarGraphSample[3168:20b] 156
2010-09-16 13:21:53.814 BarGraphSample[3168:20b] 69398112

这是输出。

这里实际的高度是78,235,156，
，同时打印数组val。

Here the actual barheights are 78,235,156, while printing the array val.

我得到像69398112这样的价值

Im getting like values like "69398112"

我该怎么办？

推荐答案

您只能将对象的指针添加到 NSMutableArray 。如果使用 NSNumber 类来包装整数，则应该能够将其添加到数组中。

You can only add pointers to objects to an NSMutableArray. If you use the NSNumber class though to wrap your integer, you should then be able to add that to the array.

int x = 10;
NSNumber* xWrapped = [NSNumber numberWithInt:x];
NSMutableArray* array = [[NSMutableArray alloc] initWithCapacity:15];
[array addObject:xWrapped];
int xOut = [[array lastObject] intValue]; //xOut == x;

希望这会有所帮助。

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