【发布时间】：2016-02-05 15:29:56
【问题描述】：
在我的测试项目中，我计划有多个选择器视图。对于这些选择器视图，将有 UIToolbars 和自定义 UIBarButtons。我试图创建一个类方法，这样我就不必重复代码了，但是按钮似乎没有显示出来。
选择器完成按钮.h
#import <UIKit/UIKit.h>
@interface UIBarButtonItem (test)
+ (UIBarButtonItem*)barButtonItemWithTint:(UIColor*)color andTitle:(NSString*)itemTitle andTarget:(id)theTarget andSelector:(SEL)selector;
@end
Picker Done Button.m
#import "PickerDoneButton.h"
@implementation UIBarButtonItem (test)
+ (UIBarButtonItem*)barButtonItemWithTint:(UIColor*)color andTitle:(NSString*)itemTitle andTarget:(id)theTarget andSelector:(SEL)selector
{
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.tintColor = color;
button.backgroundColor = [UIColor yellowColor];
[button addTarget:theTarget action:selector forControlEvents:UIControlEventValueChanged];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithCustomView:button];
return doneButton;
}
@end
并在我的 View Controller.m 上使用此类方法（我省略了 viewDidLoad 之后的选取器视图方法）
#import "ViewController.h"
#import "PickerDoneButton.h"
@interface ViewController ()
@property (strong, nonatomic) NSArray *numberofPeople;
@property (strong, nonatomic) UIPickerView *countPeople;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.countPeople = [[UIPickerView alloc] init];
self.countPeople.dataSource = self;
self.countPeople.delegate = self;
self.numberofPeople = @[@"1",@"2",@"3"];
UIToolbar *countPeopleToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0,0,0,50)];
countPeopleToolbar.barStyle = UIBarStyleBlackOpaque;
// Call the UIBarButtonItem from PickerDoneButton.h
countPeopleToolbar.items = @[[UIBarButtonItem barButtonItemWithTint:[UIColor redColor] andTitle:@"Done" andTarget:self andSelector:@selector(doneClicked)]];
[self pickerView:self.countPeople didSelectRow:0 inComponent:0];
}
我是否正确使用了类方法？
【问题讨论】：
标签： ios objective-c uibarbuttonitem class-method