+(UIColor *)colorWithHexString:(NSString *)coloStr{
// 检索 去下空格和换行 转成大写
NSString *cString = [[coloStr stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
if (cString.length<6) {
return [UIColor clearColor];
}
// 看以什么开头
if ([cString hasPrefix:@"0X"]) {
cString = [cString substringFromIndex:2];
}
if ([cString hasPrefix:@"#"]) {
cString = [cString substringFromIndex:1];
}
if ([cString length] != 6) {
return [UIColor clearColor];
}
// 截取字符串
NSRange range;
range.location = 0 ;
range.length = 2 ;
NSString *rString = [cString substringWithRange:range];
range.location = 2;
NSString *gString = [cString substringWithRange:range];
range.location = 4;
NSString *bString = [cString substringWithRange:range];
// 16进制转化10进制
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:1.0];
}