請(qǐng)問(wèn)老師在swift 語(yǔ)言中怎樣直接使用16進(jìn)制的色值
請(qǐng)問(wèn)老師在swift 語(yǔ)言中怎樣直接使用16進(jìn)制的色值
恩格貝
2015-03-11
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2016-04-06
func UIColorFromRGB (hex:String) -> UIColor {
? ? ? ? var cString:String = hex.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet()).uppercaseString
?? ? ? ?
? ? ? ? if (cString.hasPrefix("#")) {
? ? ? ? ? ? cString = (cString as NSString).substringFromIndex(1)
? ? ? ? }
? ? ? ? let rString = (cString as NSString).substringToIndex(2)
? ? ? ? let gString = ((cString as NSString).substringFromIndex(2) as NSString).substringToIndex(2)
? ? ? ? let bString = ((cString as NSString).substringFromIndex(4) as NSString).substringToIndex(2)
?? ? ? ?
? ? ? ? var r:CUnsignedInt = 0, g:CUnsignedInt = 0, b:CUnsignedInt = 0;
? ? ? ? NSScanner(string: rString).scanHexInt(&r)
? ? ? ? NSScanner(string: gString).scanHexInt(&g)
? ? ? ? NSScanner(string: bString).scanHexInt(&b)
? ? ? ? return UIColor(red: CGFloat(r) / 255.0, green: CGFloat(g) / 255.0, blue: CGFloat(b) / 255.0, alpha: CGFloat(1))
? ? }
eg:
self.setTitleColor(UIColorFromRGB("0xec8c00"), forState: .Selected)
2016-11-23
已用粗體標(biāo)出。
2016-11-23
func UIColorFromRGB (hex:String) -> UIColor {???????
??????? var cString:String = hex.trimmingCharacters(in: NSCharacterSet.whitespacesAndNewlines)
??????? if (cString.hasPrefix("#")) {????????
??????????? cString = (cString as NSString).substring(from: 1)
??????? }????
??????? let rString = (cString as NSString).substring(to: 2)
??????? let gString = ((cString as NSString).substring(from: 2) as NSString).substring(to: 2)
??????? let bString = ((cString as NSString).substring(from: 4) as NSString).substring(to: 2)
??????? var r:CUnsignedInt = 0, g:CUnsignedInt = 0, b:CUnsignedInt = 0;
??????? Scanner(string: rString).scanHexInt32(&r)
??????? Scanner(string: gString).scanHexInt32(&g)
??????? Scanner(string: bString).scanHexInt32(&b)
??????? return UIColor(red: CGFloat(r) / 255.0, green: CGFloat(g) / 255.0, blue: CGFloat(b) / 255.0, alpha: CGFloat(1))?
??? }
這些需要改動(dòng)的。
2016-11-23
親測(cè)，可以使用謝謝！不過(guò)swift3的語(yǔ)法略微有些變化，需要稍微修改下。
2016-02-17
這個(gè)還需要轉(zhuǎn)換成UIColor里面三色才能使用