<GCKMediaQueueDelegate> 协议
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
用于从 GCKMediaQueue 接收异步通知的委托协议。
- 开始时间
- 4.3.4
继承 <NSObjectNSObject>。
在即将对队列中执行一项或多项更改时调用。
- Parameters
-
在队列完全重新加载时调用。
之前访问过的任何队列项都应被视为无效。
- Parameters
-
| - (void) mediaQueue: |
|
(GCKMediaQueue *) |
queue |
| didInsertItemsInRange: |
|
(NSRange) |
range |
|
|
| |
|
optional |
当连续范围的队列项已插入队列中时调用。
- Parameters
-
| queue | The queue. |
| range | The range indicating the starting index and count of items inserted. |
| - (void) mediaQueue: |
|
(GCKMediaQueue *) |
queue |
| didUpdateItemsAtIndexes: |
|
(NSArray< NSNumber * > *) |
indexes |
|
|
| |
|
optional |
当队列中的一个或多个队列项已更新时调用。
这包括之前已访问但不可用的项已检索并放入缓存的情况，以及先前缓存的项已从缓存中清除的情况。
- Parameters
-
| queue | The queue. |
| indexes | The ordered list of indexes of the items that have been updated. |
| - (void) mediaQueue: |
|
(GCKMediaQueue *) |
queue |
| didRemoveItemsAtIndexes: |
|
(NSArray< NSNumber * > *) |
indexes |
|
|
| |
|
optional |
当一个或多个队列项已从队列中移除时调用。
- Parameters
-
| queue | The queue. |
| indexes | The ordered list of indexes of the items that have been removed. |
如未另行说明，那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可，并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情，请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC)：2025-07-25。
[null,null,["最后更新时间 (UTC)：2025-07-25。"],[[["\u003cp\u003eThe \u003ccode\u003eGCKMediaQueueDelegate\u003c/code\u003e protocol enables receiving asynchronous notifications from a \u003ccode\u003eGCKMediaQueue\u003c/code\u003e, informing about changes like insertions, removals, and updates.\u003c/p\u003e\n"],["\u003cp\u003eIt provides methods to handle queue changes, including \u003ccode\u003emediaQueueWillChange:\u003c/code\u003e, \u003ccode\u003emediaQueueDidReloadItems:\u003c/code\u003e, \u003ccode\u003emediaQueue:didInsertItemsInRange:\u003c/code\u003e, \u003ccode\u003emediaQueue:didUpdateItemsAtIndexes:\u003c/code\u003e, \u003ccode\u003emediaQueue:didRemoveItemsAtIndexes:\u003c/code\u003e, and \u003ccode\u003emediaQueueDidChange:\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThese methods are optional and offer insights into queue modifications, such as when items are added, updated, or removed, or when the entire queue is reloaded.\u003c/p\u003e\n"],["\u003cp\u003eDevelopers can implement these methods to respond to queue events and update their application's state accordingly, ensuring synchronization with the media queue.\u003c/p\u003e\n"]]],["The `GCKMediaQueueDelegate` protocol provides methods for asynchronous notifications about changes to a media queue. Key actions include: notifying when changes are imminent (`mediaQueueWillChange:`), when the queue is reloaded (`mediaQueueDidReloadItems:`), when items are inserted (`mediaQueue:didInsertItemsInRange:`), updated (`mediaQueue:didUpdateItemsAtIndexes:`), or removed (`mediaQueue:didRemoveItemsAtIndexes:`), and when changes are completed (`mediaQueueDidChange:`). Each method provides the affected queue and relevant details like ranges or indexes.\n"],null,["# <GCKMediaQueueDelegate> Protocol\n\n[Instance Methods](#pub-methods) \n\\\u003cGCKMediaQueueDelegate\\\u003e Protocol Reference \n\nOverview\n--------\n\nThe delegate protocol for receiving asynchronous notifications from a [GCKMediaQueue](/cast/docs/reference/ios/interface_g_c_k_media_queue \"A data model representation of a media queue of arbitrary length. \").\n\nSince\n: 4.3.4\n\nInherits \\\u003cNSObjectNSObject\\\u003e.\n\n|--------|-------------------------------------------------------------------------------------------------------------------------------------------|\n| Instance Method Summary ----------------------- ||\n| (void) | - [mediaQueueWillChange:](/cast/docs/reference/ios/protocol_g_c_k_media_queue_delegate-p#a67d1e8d507009c2358055878f0734beb) |\n| | Called when one or more changes are about to be made to the queue. [More...](#a67d1e8d507009c2358055878f0734beb) |\n| ||\n| (void) | - [mediaQueueDidReloadItems:](/cast/docs/reference/ios/protocol_g_c_k_media_queue_delegate-p#a47da208fd18f9c9e8d77b9b9820008e0) |\n| | Called when the queue has been entirely reloaded. [More...](#a47da208fd18f9c9e8d77b9b9820008e0) |\n| ||\n| (void) | - [mediaQueue:didInsertItemsInRange:](/cast/docs/reference/ios/protocol_g_c_k_media_queue_delegate-p#a999c9cff6813cc3e3217b56783d9923f) |\n| | Called when a contiguous range of queue items ahve been inserted into the queue. [More...](#a999c9cff6813cc3e3217b56783d9923f) |\n| ||\n| (void) | - [mediaQueue:didUpdateItemsAtIndexes:](/cast/docs/reference/ios/protocol_g_c_k_media_queue_delegate-p#a1b1e5914235108690d76c49d2c12fab3) |\n| | Called when one or more queue items have been updated in the queue. [More...](#a1b1e5914235108690d76c49d2c12fab3) |\n| ||\n| (void) | - [mediaQueue:didRemoveItemsAtIndexes:](/cast/docs/reference/ios/protocol_g_c_k_media_queue_delegate-p#ae1d7987e73d3adbbc87efb1115775e88) |\n| | Called when one or more queue items have been removed from the queue. [More...](#ae1d7987e73d3adbbc87efb1115775e88) |\n| ||\n| (void) | - [mediaQueueDidChange:](/cast/docs/reference/ios/protocol_g_c_k_media_queue_delegate-p#a167626bc840e79933b16480962362e1c) |\n| | Called after one or more queue changes have been made to the queue. [More...](#a167626bc840e79933b16480962362e1c) |\n| ||\n\nMethod Detail\n-------------\n\n|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------|\n| |--------------------------------|---|----------------------------------------------------------------------------|---------|---| | - (void) mediaQueueWillChange: | | ([GCKMediaQueue](/cast/docs/reference/ios/interface_g_c_k_media_queue) \\*) | *queue* | | | optional |\n\nCalled when one or more changes are about to be made to the queue.\n\nParameters\n:\n\n |-------|------------|\n | queue | The queue. |\n\n\n|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------|\n| |------------------------------------|---|----------------------------------------------------------------------------|---------|---| | - (void) mediaQueueDidReloadItems: | | ([GCKMediaQueue](/cast/docs/reference/ios/interface_g_c_k_media_queue) \\*) | *queue* | | | optional |\n\nCalled when the queue has been entirely reloaded.\n\nAny previously accessed queue items should be considered invalid.\n\nParameters\n:\n\n |-------|------------|\n | queue | The queue. |\n\n\n|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------|\n| |------------------------|---|----------------------------------------------------------------------------|---------| | - (void) mediaQueue: | | ([GCKMediaQueue](/cast/docs/reference/ios/interface_g_c_k_media_queue) \\*) | *queue* | | didInsertItemsInRange: | | (NSRange) | *range* | | | | | | | optional |\n\nCalled when a contiguous range of queue items ahve been inserted into the queue.\n\nParameters\n:\n\n |-------|----------------------------------------------------------------------|\n | queue | The queue. |\n | range | The range indicating the starting index and count of items inserted. |\n\n\n|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------|\n| |--------------------------|---|----------------------------------------------------------------------------|-----------| | - (void) mediaQueue: | | ([GCKMediaQueue](/cast/docs/reference/ios/interface_g_c_k_media_queue) \\*) | *queue* | | didUpdateItemsAtIndexes: | | (NSArray\\\u003c NSNumber \\* \\\u003e \\*) | *indexes* | | | | | | | optional |\n\nCalled when one or more queue items have been updated in the queue.\n\nThis includes the case where previously accessed but unavailable items have been retrieved and placed in the cache, and the case where previously cached items have been flushed from the cache.\n\nParameters\n:\n\n |---------|------------------------------------------------------------------|\n | queue | The queue. |\n | indexes | The ordered list of indexes of the items that have been updated. |\n\n\n|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------|\n| |--------------------------|---|----------------------------------------------------------------------------|-----------| | - (void) mediaQueue: | | ([GCKMediaQueue](/cast/docs/reference/ios/interface_g_c_k_media_queue) \\*) | *queue* | | didRemoveItemsAtIndexes: | | (NSArray\\\u003c NSNumber \\* \\\u003e \\*) | *indexes* | | | | | | | optional |\n\nCalled when one or more queue items have been removed from the queue.\n\nParameters\n:\n\n |---------|------------------------------------------------------------------|\n | queue | The queue. |\n | indexes | The ordered list of indexes of the items that have been removed. |\n\n\n|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------|\n| |-------------------------------|---|----------------------------------------------------------------------------|---------|---| | - (void) mediaQueueDidChange: | | ([GCKMediaQueue](/cast/docs/reference/ios/interface_g_c_k_media_queue) \\*) | *queue* | | | optional |\n\nCalled after one or more queue changes have been made to the queue."]]
