随笔分类 -  Swift

上一页 1 2 3 4
Swift - 17 - 数组的初始化
摘要：import UIKit // 声明数组 var array = ["A", "B", "C", "D", "E"]; var array2:[String] = ["A", "B", "C", "D", "E"]; var array3:Array<String> = ["A", "B", "C" 阅读全文
posted @ 2015-12-16 12:35 Rinpe 阅读(1134) 评论(0) 推荐(0)
Swift - 16 - String.Index和Range
摘要：//: Playground - noun: a place where people can playimport UIKitvar str = "Welcome to Play Swift! Step by Step learn Swift language from now!"// range... 阅读全文
posted @ 2015-12-16 12:33 Rinpe 阅读(798) 评论(0) 推荐(0)
Swift - 15 - 导入Foundation使用更多字符串功能
摘要：//: Playground - noun: a place where people can playimport Foundationvar str = "Hello, playground"str.capitalizedString // 字符串中所有单词首字母大写, 不改变str本身的值... 阅读全文
posted @ 2015-12-16 12:32 Rinpe 阅读(216) 评论(0) 推荐(0)
Swift - 14 - 字符串的基础操作
摘要：//: Playground - noun: a place where people can playimport UIKit// 拼接var str = "Hello, playground"str + "hello, swift" // 这样的拼接, str还是没有改变strstr +=... 阅读全文
posted @ 2015-12-16 12:30 Rinpe 阅读(176) 评论(0) 推荐(0)
Swift - 13 - 字符串和Character
摘要：//: Playground - noun: a place where people can playimport UIKitvar str = "hi"// 字符串拼接str += ", rinpe"str += ", lili"// 创建一个空的字符串var nullStr = String(... 阅读全文
posted @ 2015-12-16 12:18 Rinpe 阅读(162) 评论(0) 推荐(0)
Swift - 12 - 区间运算符和for-in
摘要：//: Playground - noun: a place where people can playimport UIKitvar str = "Hello, playground"var a = 1, b = 10// a到b(包含a,b) [a,b]a...b// a到b-1(包含a,不包含... 阅读全文
posted @ 2015-12-16 11:43 Rinpe 阅读(218) 评论(0) 推荐(0)
Swift - 11 - nil聚合运算
摘要：//: Playground - noun: a place where people can playimport UIKitvar str = "Hello, playground"// nil的聚合运算可以说是为了可选值而出的 // 它的体现是"??"// eg:// a ?? b -> ... 阅读全文
posted @ 2015-12-16 11:37 Rinpe 阅读(236) 评论(0) 推荐(0)
Swift - 10 - assert(断言)
摘要：//: Playground - noun: a place where people can playimport UIKitvar str = "Hello, playground"// 断言, 必须符合某个条件,程序才能继续运行下去// 可以看做是一个底线要求var age = 19;asse... 阅读全文
posted @ 2015-12-16 11:35 Rinpe 阅读(173) 评论(0) 推荐(0)
Swift - 09 - Optionals
摘要：//: Playground - noun: a place where people can play import UIKit // swift中没有被赋值的变量是不能被使用的 //var str : String //str // Optionals 可选值 (用?号体现) // 或者是一个值 阅读全文
posted @ 2015-12-16 11:32 Rinpe 阅读(188) 评论(0) 推荐(0)
Swift - 08 - 元组
摘要：//: Playground - noun: a place where people can playimport UIKit// 元组就是将多个不同的值集合成一个数据/* 元组是Objective-C中没有的数据类型，与数组类似，都是表示一组数据的集合，但与数组不同，它的特点是： 特点: 1.可... 阅读全文
posted @ 2015-12-16 11:11 Rinpe 阅读(187) 评论(0) 推荐(0)
Swift - 07 - 布尔类型
摘要：//: Playground - noun: a place where people can playimport UIKitvar str = "Hello, playground"let orangeAreYellowColor = truelet appleIsBlue = falseif ... 阅读全文
posted @ 2015-12-16 11:09 Rinpe 阅读(187) 评论(0) 推荐(0)
Swift - 06 - 数值类型转换和类型别名
摘要：//: Playground - noun: a place where people can playimport UIKitvar str = "Hello, playground"// 数值类型转换let three = 3let PI = Double(three) + 0.1415926 ... 阅读全文
posted @ 2015-12-16 11:06 Rinpe 阅读(239) 评论(0) 推荐(0)
Swift - 05 - 数值型字面量
摘要：//: Playground - noun: a place where people can playimport UIKitvar str = "Hello, playground"let 十进制的10 = 10let 八进制的8 = 0o10let 二进制的2 = 0b10let 十六进制的1... 阅读全文
posted @ 2015-12-16 11:03 Rinpe 阅读(166) 评论(0) 推荐(0)
Swift - 04 - 浮点型
摘要：import UIKitvar str = "Hello, playground"// 显式定义浮点型常量let PI:Float = 3.141592612312312let PI2:Double = 3.14123456789123123123// 隐式定义浮点型变量var randomFloa... 阅读全文
posted @ 2015-12-16 11:01 Rinpe 阅读(169) 评论(0) 推荐(0)
Swift - 03 - 整数类型
摘要：//: Playground - noun: a place where people can playimport UIKitvar str = "Hello, playground"let MAXVALUEOFUINT8 = UInt8.maxlet MINVALUEOFUINT8 = UInt... 阅读全文
posted @ 2015-12-16 10:57 Rinpe 阅读(185) 评论(0) 推荐(0)
Swift - 02 - 常量和变量
摘要：//: Playground - noun: a place where people can playimport UIKitvar str = "Hello, playground"// 常量的定义用letlet maxLoginCount = 10// 变量的定义用varvar current... 阅读全文
posted @ 2015-12-16 10:54 Rinpe 阅读(172) 评论(0) 推荐(0)
开始Swift之旅 - HelloWorld
摘要：//: Playground - noun: a place where people can playimport UIKitvar str = "Hello, playground"print("HelloWorld")print("hello, swift!")print("this is m... 阅读全文
posted @ 2015-12-16 10:51 Rinpe 阅读(141) 评论(0) 推荐(0)
Swift 提示 error running playground...
摘要：创建playground之后，我们将得到一个错误提示,Error running playground: Failed to prepare for communication with playground”。如果这种情况发生，关闭Xcode然后重启，这个错误就会消失了。 阅读全文
posted @ 2015-12-08 10:58 Rinpe 阅读(356) 评论(0) 推荐(0)

上一页 1 2 3 4