Ios 优化CALayer设置位置
我希望在一个应用程序中有大约400个Calayer，并在一个动画手势中重新定位（和缩放它们）。在此操作期间，他们不需要重新绘制内容，只需移动并重新缩放即可。我想保持动画每秒60帧 我的目标至少是能够运行iOS 7的任何东西。支持iOS 6设备也很好 为了检查可行性，我基于苹果的单视图模板项目编写了一个小型测试应用程序。代码包括在下面 使用仪器进行评测时，绝大多数运行时（94%）都在显示链接回调中。其中54%花在Ios 优化CALayer设置位置,ios,cocoa-touch,animation,calayer,Ios,Cocoa Touch,Animation,Calayer,我希望在一个应用程序中有大约400个Calayer，并在一个动画手势中重新定位（和缩放它们）。在此操作期间，他们不需要重新绘制内容，只需移动并重新缩放即可。我想保持动画每秒60帧 我的目标至少是能够运行iOS 7的任何东西。支持iOS 6设备也很好 为了检查可行性，我基于苹果的单视图模板项目编写了一个小型测试应用程序。代码包括在下面 使用仪器进行评测时，绝大多数运行时（94%）都在显示链接回调中。其中54%花在[CALayer setPosition]上，33%花在CA:：Transaction
[CALayer setPosition]CA:：Transaction:：commit（） Running Time Self Symbol Name
147914.0ms 100.0% 1754.0 -[STViewController displayLinkCallback:]
85265.0ms 57.6% 323.0 -[CALayer setPosition:]
83842.0ms 56.6% 8301.0 CA::Layer::set_position(CA::Vec2<double> const&, bool)
27247.0ms 18.4% 811.0 CA::Layer::begin_change(CA::Transaction*, unsigned int, objc_object*&)
21103.0ms 14.2% 316.0 actionForKey(CALayer*, CA::Transaction*, NSString*)
4819.0ms 3.2% 2296.0 CAAtomGetString
188.0ms 0.1% 188.0 -[CALayer actionForKey:]
171.0ms 0.1% 171.0 DYLD-STUB$$x_strtod
88.0ms 0.0% 88.0 DYLD-STUB$$-[NSString(CAMLWriter) CAMLType]
34.0ms 0.0% 34.0 CA::Transaction::get_value(unsigned int, _CAValueType, void*)
33.0ms 0.0% 33.0 DYLD-STUB$$-[NSNumber(CAMLWriter) CAMLType]
23316.0ms 15.7% 730.0 CA::Layer::end_change(CA::Transaction*, unsigned int, objc_object*)
12759.0ms 8.6% 1266.0 CA::Layer::writable_state(CA::Transaction*)
7523.0ms 5.0% 557.0 -[NSObject(NSKeyValueObserverNotification) willChangeValueForKey:]
1145.0ms 0.7% 1145.0 OSSpinLockLock
594.0ms 0.4% 594.0 _Unwind_SjLj_Unregister
327.0ms 0.2% 327.0 OSSpinLockLock$shim
310.0ms 0.2% 310.0 CAAtomGetString
306.0ms 0.2% 306.0 __inline_isnand
298.0ms 0.2% 246.0 CA::Transaction::unlock()
215.0ms 0.1% 215.0 objc_msgSend
203.0ms 0.1% 203.0 _Unwind_SjLj_Register
168.0ms 0.1% 168.0 -[CATextLayer didChangeValueForKey:]
149.0ms 0.1% 149.0 DYLD-STUB$$-[NSNumber(CAMLWriter) CAMLType]
141.0ms 0.0% 141.0 CA::Layer::property_did_change(CA::Transaction*, unsigned int)
129.0ms 0.0% 129.0 CFRetain
123.0ms 0.0% 123.0 CA::Transaction::lock()
112.0ms 0.0% 112.0 CA::Transaction::ensure_compat()
100.0ms 0.0% 100.0 _NSKeyValueRetainedObservationInfoForObject
89.0ms 0.0% 89.0 objc_msgSend$shim
78.0ms 0.0% 78.0 DYLD-STUB$$-[NSURL(CAMLWriter) encodeWithCAMLWriter:]
57.0ms 0.0% 57.0 DYLD-STUB$$CAMLWriterFreeAttributeList(_CAMLWriterAttribute*)
42.0ms 0.0% 42.0 actionForKey(CALayer*, CA::Transaction*, NSString*)
30.0ms 0.0% 30.0 DYLD-STUB$$-[CAShapeLayer setFillColor:]
25.0ms 0.0% 25.0 DYLD-STUB$$x_strtod
24.0ms 0.0% 24.0 DYLD-STUB$$CFNumberFormatterSetProperty$shim
23.0ms 0.0% 23.0 _CFRetain
8.0ms 0.0% 8.0 magazine_alloc_
410.0ms 0.2% 410.0 DYLD-STUB$$x_strtod
135.0ms 0.0% 135.0 CA::Layer::begin_change(CA::Transaction*, unsigned int, objc_object*&)
133.0ms 0.0% 133.0 -[NSObject(NSKeyValueObserverNotification) willChangeValueForKey:]
107.0ms 0.0% 107.0 CA::Transaction::unlock()
74.0ms 0.0% 74.0 DYLD-STUB$$-[NSURL(CAMLWriter) encodeWithCAMLWriter:]
60.0ms 0.0% 60.0 DYLD-STUB$$CAMLWriterFreeAttributeList(_CAMLWriterAttribute*)
53.0ms 0.0% 53.0 CA::Layer::writable_state(CA::Transaction*)
53.0ms 0.0% 53.0 DYLD-STUB$$-[NSString(CAMLWriter) CAMLType]
27.0ms 0.0% 27.0 CA::Layer::end_change(CA::Transaction*, unsigned int, objc_object*)
27.0ms 0.0% 27.0 CA::Transaction::ensure_compat()
21.0ms 0.0% 21.0 DYLD-STUB$$CA::Display::DisplayLinkItem::set_user_info(void const*)
52572.0ms 35.5% 46.0 CA::Transaction::commit()
38450.0ms 25.9% 185.0 CA::Context::commit_transaction(CA::Transaction*)
33772.0ms 22.8% 75.0 CA::Layer::commit_if_needed(CA::Transaction*, void (*)(CA::Layer*, unsigned int, unsigned int, void*), void*)
33649.0ms 22.7% 36.0 CA::Layer::commit_if_needed(CA::Transaction*, void (*)(CA::Layer*, unsigned int, unsigned int, void*), void*)
33522.0ms 22.6% 458.0 CA::Layer::commit_if_needed(CA::Transaction*, void (*)(CA::Layer*, unsigned int, unsigned int, void*), void*)
32936.0ms 22.2% 3694.0 CA::Layer::commit_if_needed(CA::Transaction*, void (*)(CA::Layer*, unsigned int, unsigned int, void*), void*)
28899.0ms 19.5% 298.0 CA::Context::commit_layer(CA::Layer*, unsigned int, unsigned int, void*)
84.0ms 0.0% 84.0 CA::Render::Object::unref() const
83.0ms 0.0% 83.0 CA::Render::encode_set_object(CA::Render::Encoder*, unsigned long, unsigned int, CA::Render::Object*, unsigned int)
54.0ms 0.0% 54.0 DYLD-STUB$$x_strtod
47.0ms 0.0% 47.0 CA::Render::Encoder::encode_int32(unsigned int)
36.0ms 0.0% 36.0 CA::Render::Layer::~Layer()
22.0ms 0.0% 21.0 CA::Layer::thread_flags_(CA::Transaction*)
17.0ms 0.0% 17.0 CA::Layer::copy_render_layer(CA::Transaction*, unsigned int, unsigned int*)
128.0ms 0.0% 48.0 CA::Context::commit_layer(CA::Layer*, unsigned int, unsigned int, void*)
91.0ms 0.0% 0.0 CA::Context::commit_layer(CA::Layer*, unsigned int, unsigned int, void*)
46.0ms 0.0% 0.0 CA::Context::commit_layer(CA::Layer*, unsigned int, unsigned int, void*)
1.0ms 0.0% 1.0 CA::Render::Object::unref() const
1.0ms 0.0% 1.0 CA::Render::Encoder::encode_int32(unsigned int)
1765.0ms 1.1% 61.0 CA::Render::Encoder::send_message(unsigned int, unsigned int)
904.0ms 0.6% 15.0 _dispatch_queue_wakeup_global_slow
711.0ms 0.4% 3.0 CA::Render::Encoder::~Encoder()
100.0ms 0.0% 1.0 CA::Layer::layout_and_display_if_needed(CA::Transaction*)
97.0ms 0.0% 13.0 pthread_mutex_unlock
87.0ms 0.0% 14.0 _dispatch_async_f_slow
85.0ms 0.0% 41.0 _pthread_mutex_lock
74.0ms 0.0% 2.0 CA::Transaction::foreach_root(void (*)(CA::Layer*, void*), void*)
70.0ms 0.0% 29.0 CA::Layer::prepare_commit(CA::Transaction*)
66.0ms 0.0% 18.0 CA::Transaction::get_value(unsigned int, _CAValueType, void*)
56.0ms 0.0% 31.0 CA::Render::Encoder::ObjectCache::encode_invalidations(CA::Render::Encoder*)
51.0ms 0.0% 0.0 CA::Layer::collect_animations(CA::Transaction*, double, double*)
38.0ms 0.0% 38.0 dispatch_async_f
38.0ms 0.0% 38.0 _dispatch_queue_push_slow
34.0ms 0.0% 32.0 CA::Context::retain_all_contexts(bool, CA::Context**, unsigned long&)
33.0ms 0.0% 12.0 CA::Render::Encoder::Encoder(x_heap_struct*, unsigned int, void*, unsigned int, double)
31.0ms 0.0% 16.0 CA::Context::unref(bool)
29.0ms 0.0% 29.0 CA::Layer::set_next_animation_time(CA::Transaction*, double, double)
26.0ms 0.0% 20.0 CA::Transaction::unlock()
20.0ms 0.0% 20.0 x_heap_malloc_small_
19.0ms 0.0% 19.0 CA::DispatchGroup::enqueue(void (*)(void*), void*)
17.0ms 0.0% 17.0 CARecordTransaction
17.0ms 0.0% 17.0 CABackingStoreCollectAsync
15.0ms 0.0% 15.0 CAMarkStatistic
15.0ms 0.0% 15.0 CALayerGetLayer
13.0ms 0.0% 13.0 x_mem_dealloc_chain
10.0ms 0.0% 10.0 CA::Transaction::lock()
8.0ms 0.0% 8.0 x_heap_new_with_ptr
7.0ms 0.0% 7.0 x_heap_free
6.0ms 0.0% 6.0 DYLD-STUB$$-[NSString(CAMLWriter) CAMLType]
5.0ms 0.0% 5.0 CA::Transaction::foreach_command(unsigned int, void (*)(int, unsigned long, void const*, void*), void*)
5.0ms 0.0% 4.0 CATimeWithHostTime
4.0ms 0.0% 4.0 DYLD-STUB$$-[OS_dispatch_data finalize]
4.0ms 0.0% 4.0 DYLD-STUB$$-[NSNumber(CAMLWriter) CAMLType]
3.0ms 0.0% 3.0 OSSpinLockUnlock$shim
3.0ms 0.0% 3.0 OSSpinLockLock$shim
3.0ms 0.0% 3.0 pthread_mutex_lock
3.0ms 0.0% 3.0 DYLD-STUB$$dlsym
2.0ms 0.0% 2.0 CA::CG::Queue::collect(double)
2.0ms 0.0% 0.0 CACurrentMediaTime
2.0ms 0.0% 2.0 CA::Render::Encoder::set_object_cache(CA::Render::Encoder::ObjectCache*)
2.0ms 0.0% 2.0 x_heap_malloc
2.0ms 0.0% 2.0 __mtx_droplock
1.0ms 0.0% 1.0 OSSpinLockLock
1.0ms 0.0% 1.0 CA::Render::Encoder::encode_int64(unsigned long long)
1.0ms 0.0% 1.0 CA::Layer::collect_layers_(CA::Layer::CollectLayersData*)
1.0ms 0.0% 1.0 CA::Render::Coder::Coder(x_heap_struct*)
1.0ms 0.0% 1.0 DYLD-STUB$$CAMLWriterFreeAttributeList(_CAMLWriterAttribute*)
1.0ms 0.0% 1.0 x_hash_table_foreach
1.0ms 0.0% 1.0 CA::Render::Coder::~Coder()
1.0ms 0.0% 1.0 pthread_threadid_np
13744.0ms 9.2% 2112.0 CA::Layer::free_transaction(CA::Transaction*)
70.0ms 0.0% 26.0 x_hash_table_free
67.0ms 0.0% 0.0 CA::Transaction::Level::free_levels(CA::Transaction::Level*)
34.0ms 0.0% 12.0 x_hash_table_foreach
30.0ms 0.0% 30.0 CALayerRelease
29.0ms 0.0% 29.0 CA::Layer::State::unref(CA::Transaction*) const
25.0ms 0.0% 20.0 x_hash_table_remove_if
16.0ms 0.0% 16.0 x_hash_table_size
11.0ms 0.0% 11.0 DYLD-STUB$$__39-[CAWindowServer displayWithDisplayId:]_block_invoke
8.0ms 0.0% 8.0 DYLD-STUB$$-[NSString(CAMLWriter) CAMLType]
7.0ms 0.0% 7.0 x_mem_dealloc_size
4.0ms 0.0% 4.0 OSSpinLockLock
4.0ms 0.0% 4.0 CA::Render::Encoder::ObjectCache::encode_invalidations(CA::Render::Encoder*)
3.0ms 0.0% 3.0 DYLD-STUB$$usleep$shim
3.0ms 0.0% 0.0 magazine_dealloc_
2.0ms 0.0% 2.0 DYLD-STUB$$-[NSNumber(CAMLWriter) CAMLType]
2.0ms 0.0% 2.0 x_heap_malloc
2.0ms 0.0% 2.0 x_heap_free
2.0ms 0.0% 2.0 CA::Render::Encoder::~Encoder()
2.0ms 0.0% 2.0 DYLD-STUB$$mig_put_reply_port$shim
2.0ms 0.0% 2.0 CA::release_root_if_unused(CA::Layer*, CA::Layer*, void*)
2.0ms 0.0% 2.0 CA::Render::Encoder::send_message(unsigned int, unsigned int)
1.0ms 0.0% 1.0 CAMarkStatistic
1.0ms 0.0% 1.0 CA::Layer::collect_animations(CA::Transaction*, double, double*)
1.0ms 0.0% 1.0 pthread_mutex_unlock
1.0ms 0.0% 1.0 CA::release_root(CA::Layer*, CA::Layer*, void*)
1.0ms 0.0% 1.0 x_heap_malloc_small_
1.0ms 0.0% 1.0 _pthread_mutex_lock
1.0ms 0.0% 1.0 x_mem_dealloc_chain
4061.0ms 2.7% 4061.0 cos
2317.0ms 1.5% 2317.0 objc_msgSend
1155.0ms 0.7% 1155.0 sin
144.0ms 0.0% 0.0 +[CATransaction setAnimationDuration:]
104.0ms 0.0% 24.0 objc_object::sidetable_release(bool)
92.0ms 0.0% 78.0 CA::Transaction::push()
86.0ms 0.0% 17.0 objc_object::sidetable_retain()
76.0ms 0.0% 76.0 objc_retain
59.0ms 0.0% 59.0 -[__NSArrayM countByEnumeratingWithState:objects:count:]
56.0ms 0.0% 56.0 CA::Layer::set_position(CA::Vec2<double> const&, bool)
42.0ms 0.0% 42.0 objc_release
41.0ms 0.0% 41.0 DYLD-STUB$$objc::DenseMapBase<objc::DenseMap<objc_object*, unsigned long, true, objc::DenseMapInfo<objc_object*> >, objc_object*, unsigned long, objc::DenseMapInfo<objc_object*>, true>::erase(objc_object* const&)
19.0ms 0.0% 19.0 CA::Transaction::pop()
17.0ms 0.0% 17.0 +[CATransaction begin]
17.0ms 0.0% 13.0 CATimeWithHostTime
15.0ms 0.0% 15.0 -[CADisplayLink timestamp]
10.0ms 0.0% 10.0 +[CATransaction commit]
4.0ms 0.0% 4.0 os_lock_trylock
2.0ms 0.0% 2.0 CA::Transaction::ensure_compat()
1.0ms 0.0% 1.0 x_hash_table_remove_if
1.0ms 0.0% 1.0 DYLD-STUB$$-[NSString(CAMLWriter) CAMLType]
1.0ms 0.0% 1.0 DYLD-STUB$$-[NSNumber(CAMLWriter) CAMLType]
1.0ms 0.0% 1.0 x_heap_free
1.0ms 0.0% 1.0 x_hash_table_free
1.0ms 0.0% 1.0 objc::DenseMapBase<objc::DenseMap<objc_object*, unsigned long, true, objc::DenseMapInfo<objc_object*> >, objc_object*, unsigned long, objc::DenseMapInfo<objc_object*>, true>::find(objc_object* const&)
运行时自符号名称
147914.0ms 100.0%1754.0-[STViewController displayLinkCallback:]
85265.0ms 57.6%323.0-[CALayer设置位置：]
83842.0ms 56.6%8301.0 CA:：Layer:：set_位置（CA:：Vec2常量和布尔）
27247.0ms 18.4%811.0 CA:：层：：开始更改（CA:：事务*、未签名整数、对象*&）
21103.0ms 14.2%316.0 actionForKey（CALayer*，CA:：Transaction*，NSString*）
4819.0ms 3.2%2296.0 CAAtomGetString
188.0ms 0.1%188.0-[CALayer actionForKey:]
171.0ms 0.1%171.0 DYLD-STUB$$x\u strtod
88.0ms 0.0%88.0 DYLD-STUB$$-[NSString（CAMLWriter）CAMLType]
34.0ms 0.0%34.0 CA:：事务：：获取值（无符号int，_CAValueType，void*）
33.0ms 0.0%33.0 DYLD-STUB$$-[NSNumber（CAMLWriter）CAMLType]
23316.0ms 15.7%730.0 CA:：Layer:：end_change（CA:：Transaction*，unsigned int，objc_object*）
12759.0ms 8.6%1266.0 CA:：层：：可写_状态（CA:：事务*）
7523.0ms 5.0%557.0-[NSObject（NSKeyValueObserverNotification）将更改ValueForkey:]
1145.0ms 0.7%1145.0 OSS销锁
594.0ms 0.4%594.0_展开_SjLj_注销
327.0ms 0.2%327.0 osspinlock$垫片
310.0ms 0.2%310.0 CAAtomGetString
306.0ms 0.2%306.0内联与非
298.0ms 0.2%246.0 CA:：事务：：解锁（）
215.0ms 0.1%215.0 objc_msgSend
203.0ms 0.1%203.0_展开_SjLj_寄存器
168.0ms 0.1%168.0-[CATextLayer didChangeValueForKey:]
149.0ms 0.1%149.0 DYLD-STUB$$-[NSNumber（CAMLWriter）CAMLType]
141.0ms 0.0%141.0 CA:：Layer:：property_未更改（CA:：Transaction*，unsigned int）
129.0毫秒0.0%129.0立方英尺
123.0ms 0.0%123.0 CA:：事务：：锁（）
112.0ms 0.0%112.0 CA:：事务：：确保兼容（）
100.0ms 0.0%100.0\n关键值保留对象的观察信息
89.0ms 0.0%89.0 objc_msgSend$shim
78.0ms 0.0%78.0 DYLD-STUB$$-[NSURL（CAMLWriter）编码带CAMLWriter:]
57.0ms 0.0%57.0 DYLD-STUB$$CAMLWriterFreeAttributeList（_CAMLWriterAttribute*）
42.0ms 0.0%42.0 actionForKey（CALayer*，CA:：Transaction*，NSString*）
30.0ms 0.0%30.0 DYLD-STUB$$-[CAShapeLayer setFillColor:]
25.0ms 0.0%25.0 DYLD-STUB$$x\u标准件
24.0ms 0.0%24.0 DYLD-STUB$$CFNumberFormatterSetProperty$shim
23.0ms 0.0%23.0\cfu
8.0ms 0.0%8.0弹匣_
410.0ms 0.2%410.0 DYLD-STUB$$x\u strtod
135.0ms 0.0%135.0 CA:：层：：开始更改（CA:：事务*、未签名整数、对象*&）
133.0ms 0.0%133.0-[NSObject（NSKeyValueObserverNotification）将更改ValueForkey:]
107.0ms 0.0%107.0 CA:：事务：：解锁（）
74.0ms 0.0%74.0 DYLD-STUB$$-[NSURL（CAMLWriter）编码带CAMLWriter:]
60.0ms 0.0%60.0 DYLD-STUB$$CAMLWriterFreeAttributeList（_CAMLWriterAttribute*）
53.0ms 0.0%53.0 CA:：层：：可写_状态（CA:：事务*）
53.0ms 0.0%53.0 DYLD-STUB$$-[NSString（CAMLWriter）CAMLType]
27.0ms 0.0%27.0 CA:：Layer:：end\u更改（CA:：Transaction*，unsigned int，objc\u对象*）
27.0ms 0.0%27.0 CA:：事务：：确保兼容（）
21.0ms 0.0%21.0 DYLD-STUB$$CA:：Display:：DisplayLinkItem:：set\u user\u info（无效常量*）
52572.0ms 35.5%46.0 CA:：事务：：提交（）
38450.0ms 25.9%185.0 CA:：上下文：：提交事务（CA:：事务*）
33772.0ms 22.8%75.0 CA:：Layer:：如果需要提交（CA:：Transaction*，void（*）（CA:：Layer*，unsigned int，unsigned int，void*），void*）
33649.0ms 22.7%36.0 CA:：Layer:：commit_如果需要（CA:：Transaction*，void（*）（CA:：Layer*，unsigned int，unsigned int，void*），void*）
33522.0ms 22.6%458.0 CA:：Layer:：如果需要提交（CA:：Transaction*，void（*）（CA:：Layer*，unsigned int，unsigned int，void*），void*）
32936.0ms 22.2%3694.0 CA:：Layer:：commit_如果需要（CA:：Transaction*，void（*）（CA:：Layer*，unsigned int，unsigned int，void*），void*）
28899.0ms 19.5%298.0 CA:：上下文：：提交层（CA:：层*，un）
// STViewController.m
// LayerSpeedTest
#import "STViewController.h"
@implementation CALayer (Extensions)
- (void)setNullAsActionForKeys:(NSArray *)keys
{
NSMutableDictionary *dict = [self.actions mutableCopy];
if(dict == nil)
{
dict = [NSMutableDictionary dictionaryWithCapacity:[keys count]];
}
for(NSString *key in keys)
{
[dict setObject:[NSNull null] forKey:key];
}
self.actions = dict;
}
@end
@interface STViewController ()
@property (nonatomic, retain) NSArray *layers;
@property (nonatomic, retain) CADisplayLink *displayLink;
-(void) displayLinkCallback:(CADisplayLink*) displayLink;
@end
@implementation STViewController
- (void)viewDidLoad
{
[super viewDidLoad];
UIView *const view = [self view];
[view setBackgroundColor: [UIColor blackColor]];
CALayer *const layer = [view layer];
NSMutableArray *layers = [NSMutableArray array];
for(NSUInteger i=0; i<24*3*4; ++i)
{
CATextLayer *const textLayer = [CATextLayer layer];
[textLayer setContentsScale: [[UIScreen mainScreen] scale]];
[textLayer setForegroundColor: [[UIColor whiteColor] CGColor]];
[textLayer setBackgroundColor: [[UIColor clearColor] CGColor]];
[textLayer setBounds: CGRectMake(0,0,100,100)];
[textLayer setString: @"100"];
[textLayer setNeedsDisplay];
[textLayer setPosition: CGPointMake(160,200)];
[textLayer setNullAsActionForKeys: @[@"position"]];
[layer addSublayer: textLayer];
[layers addObject: textLayer];
}
_layers = layers;
_displayLink = [CADisplayLink displayLinkWithTarget: self selector: @selector(displayLinkCallback:)];
[_displayLink addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
}
-(void) displayLinkCallback:(CADisplayLink *)displayLink
{
const NSTimeInterval timestamp = [displayLink timestamp]*0.3;
[CATransaction begin];
[CATransaction setAnimationDuration:0];
{
NSUInteger i=0;
for(CALayer *const layer in _layers)
{
const CGFloat angle = i*0.1 + timestamp;
[layer setPosition: CGPointMake( 160 + 100 * sin(angle), 250 + 200 * cos(angle*0.728734))];
++i;
}
}
[CATransaction commit];
}
@end