这里的问题是 UIColor 不符合“键编码”(我不确定正确的术语),你应该有这样的错误:
*** -[NSUserDefaults setObject:forKey:]: Attempt to insert non-property value
它不能保存到 NSUSerDefaults 中,您需要使用 NSKeyArchiver 保存它们或将颜色值转换为符合键码的内容。例如,我使用类别遵循 NSStringFromCGRect 方法。这是我的代码:
UIColorAdditions.h
#import <Foundation/Foundation.h>
@interface UIColor (UIColorAdditions)
+ (NSString *)stringFromUIColor:(UIColor *)color;
@end
@interface NSString (UIColorAdditions)
+ (UIColor *)colorFromNSString:(NSString *)string;
@end
UIColorAdditions.m
#import "UIColorAdditions.h"
@implementation UIColor (UIColorAdditions)
+ (NSString *)stringFromUIColor:(UIColor *)color {
return [NSString stringWithFormat:@"%@", color ];
}
@end
@implementation NSString (UIColorAdditions)
+ (UIColor*)colorFromNSString:(NSString *)string {
// The string should be something like "UIDeviceRGBColorSpace 0.5 0 0.25 1
NSArray *values = [string componentsSeparatedByString:@" "];
CGFloat red = [[values objectAtIndex:1] floatValue];
CGFloat green = [[values objectAtIndex:2] floatValue];
CGFloat blue = [[values objectAtIndex:3] floatValue];
CGFloat alpha = [[values objectAtIndex:4] floatValue];
UIColor *color = [UIColor colorWithRed:red green:green blue:blue alpha:alpha];
return color;
}
@end
使用示例:
NSString *strColor = [UIColor stringFromUIColor:[UIColor colorWithRed:0.5 green:0 blue:0.25 alpha:1.0]];
[[NSUserDefaults standardUserDefaults] setObject:strColor forKey:kViewBgColorKey];
有多种解决方案,(更好的),我刚刚发布了我的。