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.
