// 用户Account的hashCode取绝对值和颜色列表总数取余，即背景色对应的位置。图片上的文字为用户name首字（英文则转为大写）
+ (NSImage*)imageFrame:(CGRect)rect withStr:(NSString*)text name:(NSString*)name
{
if (text.length == 0) return [NSImage imageNamed:@"ic_head_default_img.png"]; // 账号为空，返回默认头像图标
if (name.length == 0) return [NSImage imageNamed:@"ic_head_default_img.png"]; // 名字为空，返回默认头像图标
NSArray*colors = [selfcolorLists];// 获取颜色列表
inthashCode = [selfgetHashCode:text];// 仿java hashCode
inthashAbs =abs(hashCode);
intnum = hashAbs % colors.count;
NSString*theColor = colors[num];
NSColor*color = [NSColorcolorWithHexString:theColor];
NSString *str = [name substringToIndex:1];
str = [strcapitalizedStringWithLocale:[NSLocale currentLocale]]; // 转为大写字母
NSImage*image = [selfcreateImage:rectwithColor:colorstr:str];
returnimage;
}
// 仿java hashCode
+ (int)getHashCode:(NSString*)str {
inthash =0;
for(inti =0; i<[strlength]; i++) {
NSString *s = [str substringWithRange:NSMakeRange(i, 1)];
char *unicode = (char *)[s cStringUsingEncoding:NSUnicodeStringEncoding];
intcharactorUnicode =0;
size_tlength =strlen(unicode);
for(intn =0; n < length; n ++) {
charactorUnicode += (int)((unicode[n] &0xff) << (n *sizeof(char) *8));
}
hash = hash *31+ charactorUnicode;
}
returnhash;
}
// 颜色列表
+ (NSArray*)colorLists
{
return @[@"0x704d4e",
@"0x973444",
@"0x546b83",
@"0x2578b5",
@"0x5c8987",
@"0xb49436",
@"0xfcb1aa",
@"0xe57373",
@"0xf06292",
@"0x9575cd",
@"0x7986cb",
@"0x64b5f6",
@"0x4fc3f7",
@"0x4dd0e1",
@"0x4db6ac",
@"0x81c784",
@"0xaed581",
@"0xff8a65",
@"0xffd54f",
@"0xffb74d",
@"0xa1887f",
@"0x90a4ae"];
}
// 生成图片
+ (NSImage*)createImage:(CGRect)rect withColor:(NSColor*)color str:(NSString*)str
{
NSBitmapImageRep *rep = [[NSBitmapImageRep alloc]
initWithBitmapDataPlanes:NULL
pixelsWide:rect.size.width
pixelsHigh:rect.size.height
bitsPerSample:8
samplesPerPixel:4
hasAlpha:YES
isPlanar:NO
colorSpaceName:NSDeviceRGBColorSpace
bitmapFormat:NSAlphaFirstBitmapFormat
bytesPerRow:0
bitsPerPixel:0];
NSGraphicsContext *gc = [NSGraphicsContext graphicsContextWithBitmapImageRep:rep];
[NSGraphicsContext setCurrentContext:gc];
CGContextRef context = [gc graphicsPort];
CGContextSetFillColorWithColor(context, [color CGColor]);
CGContextFillRect(context, rect);
NSMutableDictionary *attrs = [NSMutableDictionary dictionary];
NSIntegerfontSize = rect.size.width*2/3.0;
attrs[NSFontAttributeName] = [NSFont systemFontOfSize:fontSize];
attrs[NSForegroundColorAttributeName] = [NSColor whiteColor];
CGSizestrSize = [strsizeWithAttributes:attrs];
[strdrawAtPoint:CGPointMake(rect.size.width/2 - strSize.width/2, (rect.size.height - strSize.height)/2) withAttributes:attrs];
NSImage *img = [[NSImage alloc] initWithSize:rect.size];
[imgaddRepresentation:rep];
returnimg;
}
