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834天前+ (UIColor *)colorWithHexString:(NSString *)stringToConvert |
{ |
// Filter the special characters |
NSString *cString = [[stringToConvert stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString]; |
if ([cString length] < 6) |
return [UIColor whiteColor]; |
if ([cString hasPrefix:@"#"]) |
cString = [cString substringFromIndex:1]; |
if ([cString length] != 6) |
return [UIColor whiteColor]; |
// subString |
NSString *rString = [cString substringWithRange:(NSRange){0,2}]; |
NSString *gString = [cString substringWithRange:(NSRange){2,2}]; |
NSString *bString = [cString substringWithRange:(NSRange){4,2}]; |
// get rgb Values |
unsigned int r, g, b; |
[[NSScanner scannerWithString:rString] scanHexInt:&r]; |
[[NSScanner scannerWithString:gString] scanHexInt:&g]; |
[[NSScanner scannerWithString:bString] scanHexInt:&b]; |
// retrun color |
return [UIColor colorWithRed:((float) r / 255.0f) |
green:((float) g / 255.0f) |
blue:((float) b / 255.0f) |
alpha:1.0f]; |
} |
/* |
NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:@"@／：；（）¥「」＂、[]{}#%-*+=_\\|~＜＞$€^•'@#$%^&*()_+'\""]; |
由于NSString中有全角符号和半角符号, 因此有些符号要包括全角和半角的 |
然后调用stringByTrimmingCharactersInSet |
NSString *trimmedString = [string stringByTrimmingCharactersInSet:set]; |
trimmedString就是过滤后的字符串 |
*/ |
by: 发表于：2017-10-13 10:11:02 顶(0) | 踩(0) 回复
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