ios cocos2d cocos3d box2d [21] NSMutableArray 循环删除

转载自：http://lijianyeath.blog.163.com/blog/static/1261149042011525101230120/

方法1：

NSMutableArray *myArray;
NSArray *myArrayCopy = [NSArray arrayWithArray:myArray];
for (NSObject *anObject in myArrayCopy) {
if (shouldRemove(anObject)) {
[myArray removeObject:anObject];
}
}

方法2：

NSMutableArray *array = ...
NSMutableArray *itemsToKeep = [NSMutableArray arrayWithCapacity:[array count]];
for (id object in array) {
if (! shouldRemove(object)) {
[itemsToKeep addObject:object];
}
}
[array setArray:itemsToKeep];

Or

[array release];
array = [itemsToKeep retain];

方法3：

NSMutableArray *discardedItems = [NSMutableArray array];
SomeObjectClass *item;
for (item in originalArrayOfItems) {
if ([item shouldBeDiscarded])
[discardedItems addObject:item];
}
[originalArrayOfItems removeObjectsInArray:discardedItems];