【UIPickerView自定义选择器控件】
/*@interface AppDelegate : UIResponder <UIApplicationDelegate,UIPickerViewDataSource,UIPickerViewDelegate>//协议
@property (strong, nonatomic) UIWindow *window;
@property(strong,nonatomic)NSArray *strings;
@property(strong,nonatomic)NSArray *strings1;
@property(strong,nonatomic)NSArray *images;
提升权限 定义属性*/
//创建自定义选择器
UIPickerView *mypicker=[[UIPickerView alloc]initWithFrame:CGRectMake(0, 20, 320, 250)];
mypicker.delegate=self;
mypicker.backgroundColor=[UIColor whiteColor];
//初始化面定格在哪一行
[mypicker selectRow:2 inComponent:0 animated:YES];
self.strings=[NSArray arrayWithObjects:@"11111", @"22222",@"33333",@"44444",@"55555",nil];
self.strings1=[NSArray arrayWithObjects:@"aaaa",@"bbbb",@"cccc", nil];
//图片数组
self.images=[NSArray arrayWithObjects:[UIImage imageNamed:@"start1.jpg"],[UIImage imageNamed:@"start2.jpeg"], nil];
[self.window addSubview:mypicker];
return YES;
}
//设定列
-(NSInteger)numberOfComponentsInPickerView:(nonnull UIPickerView *)pickerView
{
return 2;
}
//设定行
-(NSInteger)pickerView:(nonnull UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
//控制每一列的行数
if(component==0)
return [self.strings count];
else
return self.strings1.count;
//return self.images.count;
}
//选择器中行和列显示的内容
-(NSString *)pickerView:(nonnull UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{ // 控制每列中每行的输入，行数要与数组中的成员个数相等
if(component==0)
return self.strings[row];
else
return self.strings1[row];
}
//与上面相等效，但此方法可以设置字体颜色
/*-(UIView *)pickerView:(nonnull UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(nullable UIView *)view
{
UILabel *label=[[UILabel alloc]init];//无需设置大小
if(component==0)
label.text=self.strings[row];//设置颜色
else
label.text=self.strings1[row];
label.textAlignment=NSTextAlignmentCenter;
label.textColor=[UIColor redColor];
return label;
}*/
//设置行的高度，直接返回一个数字
-(CGFloat)pickerView:(nonnull UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component
{
return 50;
}
//获得当前选择的行或列的信息
-(void)pickerView:(nonnull UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
if(component==0)
NSLog(@"列=%d,行=%d,是：%@",component,row,self.strings[row]);
else
NSLog(@"列=%d,行=%d,是：%@",component,row,self.strings1[row]);
}
//在选择器上显图片，返回值是视图
/*-(UIView *)pickerView:(nonnull UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(nullable UIView *)view
{
UIImageView *vv=[[UIImageView alloc]init];//创建图片视图
[vv setImage:self.images[row]];//设置图片视图显示的图片
return vv;
}*/