定制UITextLabel与选择器不会显示号码当

Question

亚马逊如何做选择项目的数量类似的挖掘。我想它然后保存号码显示在另一个tableview中。这里是我的.m文件的代码。当我点击文本框时，选择器是空的。

@interface ApparelViewController() 


@property(nonatomic, readonly) NSInteger numberOfComponents; 

@end 

@implementation ApparelViewController 



- (void)viewDidLoad { 
[super viewDidLoad]; 

UIPickerView *picker = [[UIPickerView alloc] init]; 
self.quantity.inputView = picker; 

//creating the arrays for the values in the picker wheel 

self.quantity0 = @[@1, @2, @3, @4, @5]; 

} 


//custom picker in text field 


-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView { 
return 1; 
} 

-(NSInteger)pickerView:(UIPickerView *)pickerView  numberOfRowsInComponent:(NSInteger)component { 
return self.quantity0.count; 
} 

-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:  (NSInteger)row forComponent:(NSInteger)component { 
return self.quantity0[row]; 
} 

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { 
self.quantity.text = self.quantity0[row]; 
[self.quantity resignFirstResponder]; 
} 

Answer 1

您似乎忘记给UIPicker的委托设置为self。

在你viewDidLoad，试试这个：

picker.delegate = self;