Swiftlint警告：对于哪里违规：'where'子句优于'for`内的单个if。 （for_where）

Question

我正在使用swift进行应用程序开发并使用swift lint。但我得到关于下面的代码警告：

for settingsKeys in searchResults { 

     if settingsKeys.key == settingsObject.key { 
      settingsKeys.value = settingsObject.value 
      try context.save() 
     } 
     } 

的截图兹附：

Answer 1

你swiftlint配置首选的语法是：

for settingsKeys in searchResults where settingsKeys.key == settingsObject.key { 
    settingsKeys.value = settingsObject.value 
    try context.save() 
} 

哪与

相似

for settingsKeys in (searchResults.filter { $0.key == settingsObject.key }) { 
    settingsKeys.value = settingsObject.value 
    try context.save() 
} 

如果你知道有结果只有一个具有相同key，你可能会直接使用

if let settingsKeys = (searchResults.first { $0.key == settingsObject.key }) { 
    settingsKeys.value = settingsObject.value 
    try context.save() 
} 

Answer 2

看起来像它期待where是for的一部分......

for settingsKeys in searchResults where settingsKeys.key == settingsObject.key { 
    settingsKeys.value = settingsObject.value 
    try context.save() 
}