每一开发阶段的Metric工具

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• XCTest Metrics
  Performance of measure blocks

• MetricKit
  Framework for battery and performance metrics collection

• Xcode Metrics Organizer
  Aggregated battery, performance, and I/O metrics in Xcode

MetricKit 集成

Step1

声明遵守MXMetricManagerSubscriber协议

@protocol MXMetricManagerSubscriber

Step2

向[MXMetricManager sharedManager]注册Subscriber

[[MXMetricManager sharedManager] addSubscriber:self];

Step3

实现didReceiveMetricPayloads:方法，并处理数据

- (void)didReceiveMetricPayloads:(NSArray<MXMetricPayload *> * _Nonnull)payloads{
}

其他

APL平均像素亮度

• Color of UI on OLED displays impacts energy
• Lighter colors = more energy (high APL)
• Darker colors = less energy (low APL)