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我試圖在可可中用日期標記圖片文件,並試圖在小命令行工具中執行此操作。它工作正常... 但,我似乎無法設置顏色。難道我做錯了什麼?在繪製成NSImage時設置顏色
#import <Cocoa/Cocoa.h>
int main (int argc, const char * argv[]) {
[NSApplication sharedApplication];
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
NSImage *image = [[NSImage alloc] initWithContentsOfFile:
[NSString stringWithFormat:@"%s", "/some/file.png"]];
if (image) {
[image lockFocus];
NSColor *color = [NSColor whiteColor];
// THESE DOESN'T SEEM TO WORK...
[color set];
[color setStroke];
[color setFill];
NSString *string = [NSString stringWithFormat:@"%@", [NSDate date]];
[string drawAtPoint:NSMakePoint(10, 10) withAttributes:nil];
[image unlockFocus];
NSBitmapImageRep *bits = [NSBitmapImageRep imageRepWithData:
[image TIFFRepresentation]];
NSData *data = [bits representationUsingType:NSPNGFileType
properties:nil];
[data writeToFile:@"/some/file.png"
atomically:NO];
}
[pool drain];
return 0;
}
文本的顏色是黑色而不是白色?否則,問題可能在其他地方。 – 2009-05-03 19:55:38
全部是黑色的。我也嘗試添加[NSBezierPath fillRect:rect];這也是全黑的... – epatel 2009-05-03 20:32:20