GCKSessionTraits 类
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一个对象，用于描述会话的特征和功能。
- 开始时间
- 3.0
继承自 NSObject、<NSCopying> 和 <NSCoding>。
| - (instancetype) initWithMinimumVolume: |
|
(float) |
minimumVolume |
| maximumVolume: |
|
(float) |
maximumVolume |
| volumeIncrement: |
|
(float) |
volumeIncrement |
| supportsMuting: |
|
(BOOL) |
supportsMuting |
|
|
| |
便捷初始化程序。
将音量范围设置为 [0.0, 1.0]，音量增量设置为 0.05（5%），并将 supportsMuting 标志设置为 YES。
最小音量值。
必须是非负数，且小于或等于最大音量。
最大音量值。
必须是非负数，且大于或等于最小音量。
| - (float) volumeIncrement |
|
readnonatomicassign |
调高/调低音量时的音量增量。
可以是 0，表示固定音量。必须是非负数，且小于或等于最大音量与最小音量之间的差值。
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最后更新时间 (UTC)：2025-07-26。
[null,null,["最后更新时间 (UTC)：2025-07-26。"],[[["\u003cp\u003eThe \u003ccode\u003eGCKSessionTraits\u003c/code\u003e class describes the traits and capabilities of a Cast session, such as volume control and mute support.\u003c/p\u003e\n"],["\u003cp\u003eIt provides methods to initialize session traits and to check if the device has a fixed volume.\u003c/p\u003e\n"],["\u003cp\u003eKey properties include \u003ccode\u003eminimumVolume\u003c/code\u003e, \u003ccode\u003emaximumVolume\u003c/code\u003e, \u003ccode\u003evolumeIncrement\u003c/code\u003e, and \u003ccode\u003esupportsMuting\u003c/code\u003e to define the volume control behavior.\u003c/p\u003e\n"],["\u003cp\u003eDevelopers can use \u003ccode\u003eGCKSessionTraits\u003c/code\u003e to understand and manage the audio capabilities of a Cast session.\u003c/p\u003e\n"]]],[],null,["# GCKSessionTraits Class\n\n[Instance Methods](#pub-methods) \\| [Properties](#properties) \nGCKSessionTraits Class Reference \n\nOverview\n--------\n\nAn object describing the traits and capabilities of a session.\n\nSince\n: 3.0\n\nInherits NSObject, \\\u003cNSCopying\\\u003e, and \\\u003cNSCoding\\\u003e.\n\n|----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| Instance Method Summary ----------------------- ||\n| (instancetype) | - [initWithMinimumVolume:maximumVolume:volumeIncrement:supportsMuting:](/cast/v3/reference/ios/interface_g_c_k_session_traits#aead7a055e391c18ce12151283ce46024) |\n| | Designated initializer. [More...](#aead7a055e391c18ce12151283ce46024) |\n| ||\n| (instancetype) | - [init](/cast/v3/reference/ios/interface_g_c_k_session_traits#acc7ceb4bd60b0e183835a28de81f30a4) |\n| | Convenience initializer. [More...](#acc7ceb4bd60b0e183835a28de81f30a4) |\n| ||\n| (BOOL) | - [isFixedVolume](/cast/v3/reference/ios/interface_g_c_k_session_traits#aefb739780f4ded760ebbeea03e64deb8) |\n| | Whether this is a fixed volume device. [More...](#aefb739780f4ded760ebbeea03e64deb8) |\n| ||\n\n|-------|------------------------------------------------------------------------------------------------------------|\n| Property Summary ---------------- ||\n| float | [minimumVolume](/cast/v3/reference/ios/interface_g_c_k_session_traits#ac81be4b49f074d03ed2d7402545d8b48) |\n| | The minimum volume value. [More...](#ac81be4b49f074d03ed2d7402545d8b48) |\n| ||\n| float | [maximumVolume](/cast/v3/reference/ios/interface_g_c_k_session_traits#a804c278bdb1c889d0e3f8c2befb94f95) |\n| | The maximum volume value. [More...](#a804c278bdb1c889d0e3f8c2befb94f95) |\n| ||\n| float | [volumeIncrement](/cast/v3/reference/ios/interface_g_c_k_session_traits#af42670541270cf14d58d9f771112309b) |\n| | The volume increment for up/down volume adjustments. [More...](#af42670541270cf14d58d9f771112309b) |\n| ||\n| BOOL | [supportsMuting](/cast/v3/reference/ios/interface_g_c_k_session_traits#a264fc04b795b36bb41a42fc2c54f2380) |\n| | Whether the audio can be muted. [More...](#a264fc04b795b36bb41a42fc2c54f2380) |\n| ||\n\nMethod Detail\n-------------\n\n|-----------------------------------------|---|---------|-------------------|\n| - (instancetype) initWithMinimumVolume: | | (float) | *minimumVolume* |\n| maximumVolume: | | (float) | *maximumVolume* |\n| volumeIncrement: | | (float) | *volumeIncrement* |\n| supportsMuting: | | (BOOL) | *supportsMuting* |\n| | | | |\n\nDesignated initializer. \n\n|-----------------------|---|---|---|\n| - (instancetype) init | | | |\n\nConvenience initializer.\n\nSets the volume range to \\[0.0, 1.0\\], the volume increment to 0.05 (5%), and the supportsMuting flag to `YES`. \n\n|------------------------|---|---|---|\n| - (BOOL) isFixedVolume | | | |\n\nWhether this is a fixed volume device.\n\nProperty Detail\n---------------\n\n|---------------------------------------------------------|---------------------|\n| |-------------------------| | - (float) minimumVolume | | readnonatomicassign |\n\nThe minimum volume value.\n\nMust be non-negative and less than or equal to the maximum volume. \n\n|---------------------------------------------------------|---------------------|\n| |-------------------------| | - (float) maximumVolume | | readnonatomicassign |\n\nThe maximum volume value.\n\nMust be non-negative and greater than or equal to the minimum volume. \n\n|-------------------------------------------------------------|---------------------|\n| |---------------------------| | - (float) volumeIncrement | | readnonatomicassign |\n\nThe volume increment for up/down volume adjustments.\n\nMay be 0 to indicate fixed volume. Must be non-negative and less than or equal to the difference between the maximum volume and minimum volume. \n\n|---------------------------------------------------------|---------------------|\n| |-------------------------| | - (BOOL) supportsMuting | | readnonatomicassign |\n\nWhether the audio can be muted."]]
