swift常用开发技术总结
懒加载：属性，数组(字典)，控件。。。
数组（懒加载）：
lazy var shops:Array<Dictionary<String, String>> = {
return [
[
"icon" : "danjianbao",
"name" : "单肩包"
],
[
"icon" : "liantiaobao",
"name" : "链条包"
],
[
"icon" : "qianbao",
"name" : "钱包"
],
[
"icon" : "shoutibao",
"name" : "手提包"
],
[
"icon" : "shuangjianbao",
"name" : "双肩包"
],
[
"icon" : "xiekuabao",
"name" : "斜挎包"
]
]
}()
读取plist文件
let path = NSBundle.mainBundle().pathForResource("shops", ofType: "plist")!
let shopArray:AnyObject = NSArray(contentsOfFile: path)!
let dict = shopArray as! NSDictionary
let text = dict["name"] as! String
label.text = text
let imageName = dict["icon"] as! String
let image = UIImage(named: imageName)
imageView.image = image
将plist数据转模型；
class Shop: NSObject {
var name: String!
var icon: String!
init(dict: [String : String]) {
super.init()
// self.name = dict["name"]
// self.icon = dict["icon"]
setValuesForKeysWithDictionary(dict)
}
}
加载Plist转为模型放到数组中
lazy var shops:NSMutableArray = {
let path:String = NSBundle.mainBundle().pathForResource("shops.plist", ofType: nil)!
let tempArr:NSMutableArray = NSMutableArray(contentsOfFile: path)!
let shopsArrM:NSMutableArray = NSMutableArray(capacity: tempArr.count)
for dict in tempArr
{
let shop: Shop = Shop(dict: dict as! [String : String])
shopsArrM.addObject(shop)
}
return shopsArrM
}()
字典转模型：先来看看Objective—C是怎么写的！
+(NSString *)stringTOjson:(id)temps //把字典和数组转换成json字符串
{
NSData* jsonData =[NSJSONSerialization dataWithJSONObject:temps
options:NSJSONWritingPrettyPrinted error:nil];
NSString *strs=[[NSString alloc] initWithData:jsonData
encoding:NSUTF8StringEncoding];
return strs;
}
利用NSJSONSerialization序列化成NSData,再通过NSString 转成JSON字符串
func toJSONString(dict:NSDictionary!)->NSString{
var data = NSJSONSerialization.dataWithJSONObject(dict, options: NSJSONWritingOptions.PrettyPrinted, error: nil)
var strJson=NSString(data: data, encoding: NSUTF8StringEncoding)
return strJson
}
常用语法分析
关于数组和字典的总结：
/******************************************************************************
* *
* Inquiry macros *
* *
* iCocos--Description *
* *
******************************************************************************/
/*****数组****/
var s1:Array<String> = ["]
var s2:[String] = ["] //let
var s3 = [String]()
//操作
s1.append(") // 追加
s1 += ["] // 追加
s1.insert(", atIndex: s1.count) //插入
s1.removeAtIndex() //移除s1.removeLast()／s1.removeAtIndex(<#index: Int#>)／s1.removeRange(<#subRange: Range<Int>#>)
s1[] = " //修改
//遍历
for (index, value) in enumerate(s1) { } // 遍历
/******************************************************************************
* *
* Inquiry macros *
* *
* iCocos--Description *
* *
******************************************************************************/
/******字典******/
var st1:Dictionary<Int, String> = [:"iCocos"]
var st2 = [:"iCocos"]
var st3 = Dictionary<Int, String>()
//操作
st1[] = "iCocos" //增加
st1.removeValueForKey() //移除 st1.removeAtIndex(<#index: DictionaryIndex<Key, Value>#>)
st1[] = nil //清空
st1[] = "iCocos" //修改
st1.updateValue() //修改
//遍历
for s in st1.keys {}
for ss1 in st1.values {}
for (sss, ssss) in st1 {}