arrayWithObjects ...是否有使用相同对象“a”或任何对象的快捷方式?
NSMutableArray *kkk = [NSMutableArray arrayWithObjects: @"a", @"a", @"a", @"a", nil];
类似的东西:
NSMutableArray *kkk = [NSMutableArray arrayWithObjects: [repeat: @"a", 4] , nil];
感谢
答案 0 :(得分:3)
您可以创建一个类别方法,例如:
@interface NSMutableArray (Additions)
- (void)addObject:(id)object numberOfTimes:(NSUInteger)times;
@end
@implementation NSMutableArray (Additions)
- (void)addObject:(id)object numberOfTimes:(NSUInteger)times
{
for (NSUInteger i = 0; i < times; i++) {
[self addObject:object];
}
}
@end
(根据您的具体情况,您可能希望创建对象的副本,而不是多次将同一对象添加到同一个数组中)
然后你可以这样做:
[array addObject:@"a" numberOfTimes:4];