| 常用数据类型 | 32位机器（4字节） | 64位机器（8字节） |
|---|---|---|
| char | 1 | 1 |
| BOOL | 1(=char) | 1(=bool) |
| short | 2 | 2 |
| int | 4 | 4 |
| unsigned int | 4 | 4 |
| long | 4 | 8 |
| unsigned long | 4 | 8 |
| long long | 8 | 8 |
| unsigned long long | 8 | 8 |
| float | 4 | 4 |
| double | 8 | 8 |
| NSInteger | 4(=int) | 8(=long) |
| NSUInteger | 4=(unsigned int) | 8(=unsigned long) |
| CGFloat | 4(=float) | 8(=double) |
| CGSize | 8 | 16 |
| CGRect | 16 | 32 |
| *（指针） | 4 | 8 |
| boolean_t | 4(=unsigned int) | 4(=int) |
iOS开发-常用数据类型字节数
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