我在将uicolor转换为十六进制颜色时遇到了问题，这里是我发现的
CGColorRef colorref = [[Colorview_ backgroundColor] CGColor]; int numComponents = CGColorGetNumberOfComponents（colorref）; if（numComponents == 4）{ const CGFloat * components = CGColorGetComponents（colorref）; int hexValue = 0xFF0000 * components [0] + 0xFF00 * components [1] + 0xFF * components [2]; NSString * hexString = [NSString stringWithFormat：@＃％d，hexValue]; }这段代码给了我＃5576149（例如）hexString，看看有7个数字不是6，它不是一个十六进制颜色，任何帮助将不胜感激，thx。
NSString * hexString = [NSString stringWithFormat：@＃％d，hexValue];您将其格式化为包含％d的数字
你想用十六进制格式化为％x或％X - 也许作为字符串％s我没有检查函数正在做什么以及 int hexValue 是持有
d或i有符号十进制整数392x无符号十六进制整数7fa
X无符号十六进制整数（大写字母）7FA
i have a problem in converting uicolor to hex color, here what i found
CGColorRef colorref = [[Colorview_ backgroundColor] CGColor]; int numComponents = CGColorGetNumberOfComponents(colorref); if (numComponents == 4) { const CGFloat *components = CGColorGetComponents(colorref); int hexValue = 0xFF0000*components[0] + 0xFF00*components[1] + 0xFF*components[2]; NSString *hexString = [NSString stringWithFormat:@"#%d", hexValue]; }this code is giving me #5576149 (for example) for hexString, us you see there are 7 digits not 6, it's not a hex color, any help will be appreciated, thx.
解决方案 NSString *hexString = [NSString stringWithFormat:@"#%d", hexValue];You are formatting it as a digit with %d
You want to format it as hex with %x or %X -- maybe as string %s I didnt check what the function is doing and what int hexValue is holding
d or i Signed decimal integer 392
x Unsigned hexadecimal integer 7fa
X Unsigned hexadecimal integer (capital letters) 7FA
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