可用类别写一个 方便使用
+ (UIColor *) colorWithHexString: (NSString *)color
{
NSString *cString = [[colorstringByTrimmingCharactersInSet:[NSCharacterSetwhitespaceAndNewlineCharacterSet]] uppercaseString];
// String should be 6 or 8 characters
if ([cString length] <6) {
return [UIColorclearColor];
}
// strip 0X if it appears
if ([cString hasPrefix:@"0X"])
cString = [cStringsubstringFromIndex:2];
if ([cString hasPrefix:@"#"])
cString = [cStringsubstringFromIndex:1];
if ([cString length] !=6)
return [UIColorclearColor];
// 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;
[[NSScannerscannerWithString:rString] scanHexInt:&r];
[[NSScannerscannerWithString:gString] scanHexInt:&g];
[[NSScannerscannerWithString:bString] scanHexInt:&b];
return [UIColorcolorWithRed:((float) r /255.0f) green:((float) g /255.0f) blue:((float) b /255.0f) alpha:1.0f];
}
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