objective-c - 在 NSDictionary 中存储 UIColors 并检索它们？

Question

我需要为给定索引返回特定的 UIColor。
我试图基本上将 UIColors 存储为 NSArrays

TypeColors = [[NSDictionary alloc] initWithObjectsAndKeys:

@"1", [NSArray arrayWithObjects:[NSNumber numberWithFloat:0.5],[NSNumber numberWithFloat:0.5],[NSNumber numberWithFloat:0.5],[NSNumber numberWithFloat:1.0], nil],

@"5", [NSArray arrayWithObjects:[NSNumber numberWithFloat:1.0],[NSNumber numberWithFloat:0.5],[NSNumber numberWithFloat:0.1],[NSNumber numberWithFloat:1.0], nil] , nil]; //nil to signify end of objects and keys.

在这里我想从那个字典中取回 UIColor:

a = 5;
NSArray* colorArray = [TypeColors objectForKey:a];
UIColor* color = [UIColor colorWithRed:[colorArray objectAtIndex:0]
green:[colorArray objectAtIndex:1] blue:[colorArray objectAtIndex:2] 
alpha:[colorArray objectAtIndex:3]];

它总是返回零，有人知道为什么吗？谢谢!

Answer 1

改成

UIColor* color = [UIColor colorWithRed:[[colorArray objectAtIndex:0] floatValue]
green:[[colorArray objectAtIndex:1] floatValue] blue:[[colorArray objectAtIndex:2] floatValue] 
alpha:[[colorArray objectAtIndex:3] floatValue]];

要发送到那里的参数是cgfloat而不是NSNumber