Unary operator '++' cannot be applied to an operand of type '@lvalue Int'
一元運(yùn)算符“++”不能應(yīng)用于操作數(shù)的類(lèi)型“@左值int”
需要改成"aWin+=1"
一元運(yùn)算符“++”不能應(yīng)用于操作數(shù)的類(lèi)型“@左值int”
需要改成"aWin+=1"
Cannot call value of non-function type 'UIColor'
Replace "()" with ""
Replace "()" with ""
2017-12-04
swift4里面如果+的左右有空格的話(huà)會(huì)報(bào)錯(cuò)
swift的index系統(tǒng)是我見(jiàn)過(guò)編程語(yǔ)言里最復(fù)雜的,沒(méi)有之一
2017-11-25
在swift4中遍歷一個(gè)字符串變成了這樣:
var str = "bobolaoshi dafahao"
for char in str
{
print(char);
}
var str = "bobolaoshi dafahao"
for char in str
{
print(char);
}
2017-11-25
swift 4.0 改版以后想要獲取字符的最后一個(gè)直接這樣寫(xiě):
str[str.index(before: str.endIndex)]
str[str.index(before: str.endIndex)]
2017-11-16
新版更新后應(yīng)該這么寫(xiě):
str[str.index(before: str.index(startIndex, offsetBy: 5))]
str[str.index(after: str.index(startIndex, offsetBy: 4))]
str[str.index(before: str.index(startIndex, offsetBy: 5))]
str[str.index(after: str.index(startIndex, offsetBy: 4))]
2017-11-16
swift 4 更新改版以后,以下這兩個(gè)spaceIndex要填什么?。?br />
str[str.index(before: spaceIndex)]
str[str.index(after: spaceIndex)]
str[str.index(after: spaceIndex)]
2017-11-16