我想使用 if
条件验证我的 NSUserDefaults 字符串值。我已经完成了以下代码,但我正在寻找更好的方法来验证。
NSString *savedValue = [[NSUserDefaults standardUserDefaults]
stringForKey:@"colordatafromthisvc"];
NSLog(@"%@colorValue---", savedValue);
if ([savedValue isEqualToString:@"black"]) {
_imglet.image = [_imglet.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
[_imglet setTintColor:[UIColor blackColor]];
_btnlet.tintColor = [UIColor blackColor];
} else if ([savedValue isEqualToString:@"pink"]) {
_imglet.image = [_imglet.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
[_imglet setTintColor:[UIColor purpleColor]];
_btnlet.tintColor = [UIColor purpleColor];
} else if ([savedValue isEqualToString:@"blue"]) {
_imglet.image = [_imglet.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
[_imglet setTintColor:[UIColor blueColor]];
_btnlet.tintColor = [UIColor blueColor];
} else if ([savedValue isEqualToString:@"red"]) {
_imglet.image = [_imglet.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
[_imglet setTintColor:[UIColor redColor]];
_btnlet.tintColor = [UIColor redColor];
} else if ([savedValue isEqualToString:@"yellow"]) {
_imglet.image = [_imglet.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
[_imglet setTintColor:[UIColor yellowColor]];
_btnlet.tintColor = [UIColor yellowColor];
} else {
_imglet.image = [_imglet.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
[_imglet setTintColor:[UIColor orangeColor]];
_btnlet.tintColor = [UIColor orangeColor];
}
最佳答案
为了避免样板文件,您可以将 NSDictionary
与所有有效选项一起使用。
NSDictionary *colors = @{@"black", [UIColor blackColor], @"pink": [UIColor purpleColor], @"blue": [UIColor blueColor], @"red": [UIColor redColor], @"yellow": [UIColor yellowColor]};
使用此字典,您的代码应如下所示:
NSString *savedValue = [[NSUserDefaults standardUserDefaults]
stringForKey:@"colordatafromthisvc"];
UIColor *color = colors[savedValue] ?: [UIColor orangeColor];
_imglet.image = [_imglet.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
[_imglet setTintColor:color];
_btnlet.tintColor = color;
关于ios - Objective C 中的 UserDefaults 数据验证,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52949996/