我的物体为NSArray。
每一物体都有一个财产结构,储存在t x和t y。
聚氯乙烯是该物体在10x10委员会的位置。
我想把从顶端左边(0,0)的位置到底右边(9,9)点的物体分类为NSArray,将每个物体排在每一行第一。
这样做的最容易的方法是什么?
你们有几种选择,所有选择都列在“Sorting”栏以下:http://developer.apple.com/library/mac/#documentation/coa/vis/foundation/Classes/NSArray_Class/NSArray.html#/apple_ref/doc/uid/20000137-SW12“rel=“nofollow”)。 NSArray级参考资料。 我建议你在阵列中储存的类别上添加一个比较方法(电话:或类似内容>),并使用lowcode。 该法典将研究如下内容:
// In MyObject.m
- (NSComparisonResult)compareTo:(MyObject *)other {
if (self.location.y < other.location.y && self.location.x < other.location.x) {
return NSOrderedAscending;
} else if (self.location.y == other.location.y && self.location.x == other.location.x) {
return NSOrderedSame;
} else {
return NSOrderedDescending;
}
}
// In some .m file.
NSArray *sortedArray = [objects sortedArrayUsingSelector:@selector(compareTo:)];
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