Objective c 如何从iPhone上的NSMutableArray检索整数值？

如何从NSMutableArray中获取整数值？

您需要使用：

---

如果你想的话，你有这个

创建文件extends.h添加此代码并在项目中导入“extends.h”：

/*______________________________ Extends NSMutableArray ______________________________*/
/**
 * Extend NSMutableArray
 * By DaRkD0G
 */
@interface NSMutableArray (NSArrayAdd)
/**
 *  Get element at index
 *
 *  @param index
 */
- (NSObject *) getAt:(int) index;
@end
/**
 * Extend NSMutableArray Method
 * By DaRkD0G
 */
@implementation NSMutableArray (NSArrayAdd)
/**
 *  Get element at index
 *
 *  @param index
 */
- (NSObject *) getAt:(int) index {
    NSInteger anIndex = index;
    NSObject *object = [self objectAtIndex:anIndex];
    if (object == [NSNull null]) {
        return nil;
    } else {
        NSLog(@"OK found ");
        return object;
    }

}
@end
/*______________________________ Extends NSArray ______________________________*/
/**
 * Extend NSArray
 * By DaRkD0G
 */
@interface NSArray (NSArrayAdd)
/**
 *  Get element at index
 *
 *  @param index
 */
- (NSObject *) getAt:(int) index;
@end
/**
 * Extend NSArray Method
 * By DaRkD0G
 */
@implementation NSArray (NSArrayAdd)
/**
 *  Get element at index
 *
 *  @param index
 */
- (NSObject *) getAt:(int) index {
    NSInteger anIndex = index;
    NSObject *object = [self objectAtIndex:anIndex];
    if (object == [NSNull null]) {
        return nil;
    } else {
        NSLog(@"OK found ");
        return object;
    }

}
@end

使用：

NSObject object = [self.arrayItem getAt:0];
NSObject object2 = [self.arrayItem getAt:50];

---

要避免出现警告，请使用此命令，

NSInteger theNumber=[[myArray objectAtIndex:0]integerValue]或
int-theNumber=[[myArray objectAtIndex:0]intValue]
NSObject object = [self.arrayItem getAt:0];
NSObject object2 = [self.arrayItem getAt:50];