設置button的selected狀態下image和title的時候,要注意,本身對按鈕的點擊是不會改變selected狀態的,需要我們在按鈕的監聽方法裏去對這個值設置,纔會觸發到不同狀態下
下面代碼是通過button做的一個簡易的複選框
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)loadView{
self.view = [[UIView alloc]initWithFrame:[[UIScreen mainScreen]bounds]];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setFrame:CGRectMake((self.view.bounds.size.width-180)/2, (self.view.bounds.size.height-44)/2, 180, 44)];
//normal
[button setImage:[UIImage imageNamed:[NSString stringWithFormat:@"login_checkbox_normal.png"]] forState:UIControlStateNormal];
[button setTitle:@"點我啊" forState:UIControlStateNormal];
[button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[button.titleLabel setFont:[UIFont systemFontOfSize:17]];
[button addTarget:self action:@selector(tapButton:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
}
- (void)viewDidLoad {
[super viewDidLoad];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
#pragma mark - 按鈕點擊事件
- (void)tapButton:(UIButton *)button{
[button setSelected:!button.isSelected];
if (button.isSelected) {
//selected
[button setImage:[UIImage imageNamed:[NSString stringWithFormat:@"login_checkbox_checked.png"]] forState:UIControlStateSelected];
[button setTitle:@"臥槽你真點" forState:UIControlStateSelected];
[button setTitleColor:[UIColor blackColor] forState:UIControlStateSelected];
[button.titleLabel setFont:[UIFont systemFontOfSize:17]];
}else{
//normal
[button setImage:[UIImage imageNamed:[NSString stringWithFormat:@"login_checkbox_normal.png"]] forState:UIControlStateNormal];
[button setTitle:@"點我啊" forState:UIControlStateNormal];
[button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[button.titleLabel setFont:[UIFont systemFontOfSize:17]];
}
}
@end