Swift的一些基础内容
2015-11-09 15:52
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//①判断字符串是否为空的方法 isEmpty
var str:String = "www.baidu.com"
if str.isEmpty {
print("空字符串")
}else
{
print("str的值是:\(str)")
}
//② 计算字符串的长度
str.characters.count
//③ 查询字符串是否以str字符串为开头或者结尾
if str.hasPrefix("www.") {
print("嘿嘿") //说明if else if 只要满足了if 后面就不会执行了
}else if str.hasSuffix(".com"){
print("呵呵")
}
//④ 字符串全部大写 全部小写 首字母大写方法
var uppercase = str.uppercaseString
var lowercase = uppercase.lowercaseString
var capitalized = lowercase.capitalizedString //首字母大写
//⑤ 元祖
let myProject = (one:"wocao",two:1234)
print(myProject.two)
// ⑥ swift随机数
var temp:Int = Int(arc4random()%100) + 1
var temp1:Int = Int(arc4random_uniform(100)) + 1
// ⑦ 闭与开
for iCount in 0...5{
print(iCount)
}
var fruits = ["apple","orange","banana"]
let iC = fruits.count
for i in 0..<iC{
print("第\(i+1)个水果是\(fruits[i])")
}
// ⑧ 截取字符串
let index = str.startIndex.advancedBy(4)
let index2 = str.startIndex.advancedBy(6)
//let range1 = Range<String.Index>(start: index, end: index2)
let range1 = Range(start: index, end: index2)
let rangeStr = str.substringWithRange(range1)
let range2 = str.startIndex.advancedBy(4)..<str.startIndex.advancedBy(6)
let range2Str = str.substringWithRange(range2)
// ⑨ 检查字符数里是否都是合法的(如全部都是小写)
let index = str.startIndex.advancedBy(4)
let index2 = str.startIndex.advancedBy(6)
//let range1 = Range<String.Index>(start: index, end: index2)
let range1 = Range(start: index, end: index2)
let rangeStr = str.substringWithRange(range1)
let range2 = str.startIndex.advancedBy(4)..<str.startIndex.advancedBy(6)
let range2Str = str.substringWithRange(range2)
var str:String = "www.baidu.com"
if str.isEmpty {
print("空字符串")
}else
{
print("str的值是:\(str)")
}
//② 计算字符串的长度
str.characters.count
//③ 查询字符串是否以str字符串为开头或者结尾
if str.hasPrefix("www.") {
print("嘿嘿") //说明if else if 只要满足了if 后面就不会执行了
}else if str.hasSuffix(".com"){
print("呵呵")
}
//④ 字符串全部大写 全部小写 首字母大写方法
var uppercase = str.uppercaseString
var lowercase = uppercase.lowercaseString
var capitalized = lowercase.capitalizedString //首字母大写
//⑤ 元祖
let myProject = (one:"wocao",two:1234)
print(myProject.two)
// ⑥ swift随机数
var temp:Int = Int(arc4random()%100) + 1
var temp1:Int = Int(arc4random_uniform(100)) + 1
// ⑦ 闭与开
for iCount in 0...5{
print(iCount)
}
var fruits = ["apple","orange","banana"]
let iC = fruits.count
for i in 0..<iC{
print("第\(i+1)个水果是\(fruits[i])")
}
// ⑧ 截取字符串
let index = str.startIndex.advancedBy(4)
let index2 = str.startIndex.advancedBy(6)
//let range1 = Range<String.Index>(start: index, end: index2)
let range1 = Range(start: index, end: index2)
let rangeStr = str.substringWithRange(range1)
let range2 = str.startIndex.advancedBy(4)..<str.startIndex.advancedBy(6)
let range2Str = str.substringWithRange(range2)
// ⑨ 检查字符数里是否都是合法的(如全部都是小写)
let index = str.startIndex.advancedBy(4)
let index2 = str.startIndex.advancedBy(6)
//let range1 = Range<String.Index>(start: index, end: index2)
let range1 = Range(start: index, end: index2)
let rangeStr = str.substringWithRange(range1)
let range2 = str.startIndex.advancedBy(4)..<str.startIndex.advancedBy(6)
let range2Str = str.substringWithRange(range2)
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