iOS 5 SDK创建可在任何地方使用的方法

Question

如何制作跨多个视图的方法？例如.我创造了这个:

- (void)setPageTitle:(UILabel *)title withText:(NSString *)text
{
    UIColor *pageTextColor = [UIColor colorWithRed:18.0/255.0 green:79.0/255.0 blue:118.0/255.0 alpha:1.0];

    // Set page title
    UIFont *font = [UIFont fontWithName:@"PassionOne-Regular" size:23];
    [title setFont:font];
    [title setText: text];
    title.textColor = pageTextColor;
    title.shadowColor = [UIColor colorWithRed:255.0/255.0 green:255.0/255.0 blue:255.0/255.0 alpha:1.0];
    title.shadowOffset = CGSizeMake(0, 1);

    CGRect titleRect = [title textRectForBounds:title.bounds limitedToNumberOfLines:999];
    CGRect tr = title.frame;
    tr.size.height = titleRect.size.height;
    title.frame = tr;
}

我希望能够在不同视图中的UILabels上调用setPageTitle方法.我该怎么做呢？我在哪里放置此代码才能使其正常工作？我只想把它放在1个文件中,让它在不同的视图中工作.谢谢.

Answer 1

我建议将它作为UIView类的一个类别.

UIView的+ PageTitle.h

@interface UIView (PageTitle)
- (void)setPageTitle:(UILabel *)title withText:(NSString *)text;
@end

UIView的+ PageTitle.m

#import "UIView+PageTitle.h"
@implementation UIView (PageTitle)
- (void)setPageTitle:(UILabel *)title withText:(NSString *)text {
    // your implementation
}
@end