我试图在旧系统上支持10.9中新添加的NSColor方法. 10.9之前我在一个类别中有这些允许我统一Mac和iOS之间的代码.现在10.9有这些方法,无论我在哪里使用它,我都会得到奇怪的绘图.我想动态地将这些方法添加到较旧的运行时,并且我已经找到了几个使用class_addMethod来完成它的参考.问题是,即使addMethod返回成功,也不会调用方法.
- NSColor *
- fColorWithWhite(id self,SEL _cmd,float white,float alpha) {
- return [NSColor colorWithDeviceWhite: white
- alpha: alpha];
- }
- NSColor *
- fColorWithRedGreenBlue(id self,float red,float green,float blue,float alpha) {
- return [NSColor colorWithDeviceRed: red
- green: green
- blue: blue
- alpha: alpha];
- }
- + (void)addLegacySupport {
- Class class = NSClassFromString(@"NSColor");
- BOOL success = class_addMethod(class,@selector(colorWithWhite:alpha:),(IMP)fColorWithWhite,"@@:ff");
- NSLog(@"colorWithWhite:alpha: - %i",success);
- success = class_addMethod(class,@selector(colorWithRed:green:blue:alpha:),(IMP)fColorWithRedGreenBlue,"@@:ffff");
- NSLog(@"colorWithRed:green:blue:alpha: - %i",success);
- }
任何指针都将非常感激.
