iphone6及iphone6p标准模式与放大模式
iPhone6标准大小：Optional((750.0, 1334.0))放大大小：Optional((640.0, 1136.0))
iphone6Plus标准大小：Optional((1242.0, 2208.0))放大大小：Optional((1125.0, 2001.0))
ios11 tutorials: chapter 2——foundation change
1、codable——easy encoding and decoding of data/handling JSON and plist formats
enumCodingKeys:String,CodingKey //建立custom mappings，有默认的
handle null—>add a ?
自定义init—> requiredinit(from decoder:Decoder)throws
2、Key-Value Observing(KVO)——NSObject
@objcdynamicprivate(set)varsources: [Source] = [] //from objective-C, dynamically dispatched through the objective-C runtime
API.sources.fetch{ datain
ifletsources =try!JSONDecoder().decode(Response.self, from: data).sources{
self.sources= sources;
}
}
privatevartoken:NSKeyValueObservation?
token=NewsAPI.service.observe(\.sources) {_,_in
DispatchQueue.main.async{
self.tableView.reloadData()
}
}
