颜色转换 IOS中十六进制的颜色转换为UIColor
2015-12-07 17:25
381 查看
#pragma mark - 颜色转换 IOS中十六进制的颜色转换为UIColor
-(UIColor *) colorWithHexString: (NSString *)color
{
NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
// String should be 6 or 8 characters
if ([cString length] < 6) {
return [UIColor clearColor];
}
// strip 0X if it appears
if ([cString hasPrefix:@"0X"])
cString = [cString substringFromIndex:2];
if ([cString hasPrefix:@"#"])
cString = [cString substringFromIndex:1];
if ([cString length] != 6)
return [UIColor clearColor];
// Separate into r, g, b substrings
NSRange range;
range.location = 0;
range.length = 2;
//r
NSString *rString = [cString substringWithRange:range];
//g
range.location = 2;
NSString *gString = [cString substringWithRange:range];
//b
range.location = 4;
NSString *bString = [cString substringWithRange:range];
// Scan values
unsigned int r, g, b;
[[NSScanner scannerWithString:rString] scanHexInt:&r];
[[NSScanner scannerWithString:gString] scanHexInt:&g];
[[NSScanner scannerWithString:bString] scanHexInt:&b];
return [UIColor colorWithRed:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:1.0f];
}
#pragma mark - 颜色转换 IOS中十六进制的颜色转换为UIColor
-(UIColor *) colorWithHexString: (NSString *)color
{
NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
// String should be 6 or 8 characters
if ([cString length] < 6) {
return [UIColor clearColor];
}
// strip 0X if it appears
if ([cString hasPrefix:@"0X"])
cString = [cString substringFromIndex:2];
if ([cString hasPrefix:@"#"])
cString = [cString substringFromIndex:1];
if ([cString length] != 6)
return [UIColor clearColor];
// Separate into r, g, b substrings
NSRange range;
range.location = 0;
range.length = 2;
//r
NSString *rString = [cString substringWithRange:range];
//g
range.location = 2;
NSString *gString = [cString substringWithRange:range];
//b
range.location = 4;
NSString *bString = [cString substringWithRange:range];
// Scan values
unsigned int r, g, b;
[[NSScanner scannerWithString:rString] scanHexInt:&r];
[[NSScanner scannerWithString:gString] scanHexInt:&g];
[[NSScanner scannerWithString:bString] scanHexInt:&b];
return [UIColor colorWithRed:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:1.0f];
}
相关文章推荐
- Errors running builder 'Validation' on project ** java.lang.NullPointerException
- PHP文件加载include,require。
- MiniUI 在线示例
- request.getParameter() 和request.getAttribute() 区别
- Andriod Studio Clear Project或Rebuild Project出错
- 转:Java多线程-工具篇-BlockingQueue
- Java:DocumentBuilderFactory调用XML的方法实例
- jboss8+EJB3+MDB Queue
- iOS 【UIKit-UINavigationController详解与使用(一)添加UIBarButtonItem】
- iOS 【UIKit-UIBarButtonItem 的四种初始化方式】
- SharePoint 2013 BI--Power Query for SharePoint
- iOS开发UI篇—iOS开发中三种简单的动画设置
- x01.CodeBuilder: 生成代码框架
- Uincode和ASCLL
- BlockingQueue的使用
- java.lang.SecurityException: Need BLUETOOTH_PRIVILEGED permission:
- 根据内容自动调节cell的高度
- 创建圆角 抛出一个错误:二元运算符“|”不能用于两个UIRectCorner操作数
- Build.prop重要参数解释
- Java中parse()和valueOf(),toString()的区别