UIPickerView使用：
1、单个PickerView的使用
#pragma mark ===== UIPickerView
-(UIPickerView *)pickerView
{
if (!_pickerView) {
_pickerView=[[UIPickerView alloc]init];
_pickerView.frame =CGRectMake(0, YHScreenHeight-300, YHScreenWith, 300);
_pickerView.backgroundColor=[UIColor whiteColor];
_pickerView.delegate = self;
_pickerView.dataSource = self;
_pickerView.showsSelectionIndicator = YES;
}
return _pickerView;
}
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 1;
}
#pragma mark =====
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
return self.ProvinceArray.count;
}
#pragma mark ===== 显示内容
- (nullable NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
return self.ProvinceArray[row];
}
#pragma mark ===== 每列宽度
- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component {
return YHScreenWith;
}
#pragma mark ===== 行高
- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component
{
return 40;
}
#pragma mark ===== 返回选中的行
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
NSString *str=self.ProvinceArray[row]; //输出的结果
}
#pragma mark ===== 自定义显示的view
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {
UILabel* pickerLabel = (UILabel*)view;
if (!pickerLabel){
pickerLabel = [[UILabel alloc] init];
pickerLabel.adjustsFontSizeToFitWidth = YES;
pickerLabel.textColor=[UIColor redColor];
pickerLabel.textAlignment = NSTextAlignmentCenter;
[pickerLabel setBackgroundColor:[UIColor clearColor]];
[pickerLabel setFont:[UIFont boldSystemFontOfSize:18]];
}
//设置分割线的颜色
for(UIView *singleLine in pickerView.subviews)
{
if (singleLine.frame.size.height < 1)
{
singleLine.backgroundColor = [UIColor greenColor];
}
}
pickerLabel.text = [self pickerView:pickerView titleForRow:row forComponent:component];
return pickerLabel;
}
2 ,多个PickerView的使用
#pragma mark ===== UIPickerView
-(UIPickerView *)pickerView
{
if (!_pickerView) {
_pickerView=[[UIPickerView alloc]init];
_pickerView.backgroundColor=[UIColor whiteColor];
_pickerView.delegate = self;
_pickerView.dataSource = self;
_pickerView.showsSelectionIndicator = YES;
}
return _pickerView;
}
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 3;
}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
NSInteger integer=0;
if (component==0) {
integer=self.ProvinceArray.count;
}
else if (component==1)
{
ProvinceDataModel * model= self.ProvinceArray[self.selectRowWithProvince];
integer=model.city.count;
}
else if (component==2)
{
ProvinceDataModel * model= self.ProvinceArray[self.selectRowWithProvince];
CityDataModel *cityModel=model.city[self.selectRowWithCity];
integer=cityModel.District.count;
}
return integer;
}
#pragma mark ===== 显示内容
- (nullable NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
NSString *string =nil;
if (component==0) {
ProvinceDataModel * model= self.ProvinceArray[row];
string=model.name;
}
else if (component==1)
{
ProvinceDataModel * model= self.ProvinceArray[self.selectRowWithProvince];
CityDataModel *cityModel=model.city[row];
string=cityModel.name;
}
else if (component==2)
{
ProvinceDataModel * model= self.ProvinceArray[self.selectRowWithProvince];
CityDataModel *cityModel=model.city[self.selectRowWithCity];
DistrictDataModel *TeanModel=cityModel.District[row];
string=TeanModel.name;
}
return string;
}
#pragma mark ===== 每列宽度
- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component {
return YHScreenWith/3;
}
#pragma mark ===== 行高
- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component
{
return 40;
}
#pragma mark ===== 返回选中的行
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
if (component==0)
{
self.selectRowWithProvince=row;
self.selectRowWithCity=0;
[pickerView reloadComponent:1];
[pickerView selectRow:0 inComponent:1 animated:YES];
[pickerView reloadComponent:2];
[pickerView selectRow:0 inComponent:2 animated:YES];
}
else if (component==1)
{
self.selectRowWithCity=row;
[pickerView reloadComponent:2];
[pickerView selectRow:0 inComponent:2 animated:YES];
}
else
{
self.selectRowWithTown=row;
}
}
#pragma mark ===== 自定义显示的view
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {
UILabel* pickerLabel = (UILabel*)view;
if (!pickerLabel){
pickerLabel = [[UILabel alloc] init];
pickerLabel.adjustsFontSizeToFitWidth = YES;
pickerLabel.textColor=[UIColor redColor];
pickerLabel.textAlignment = NSTextAlignmentCenter;
[pickerLabel setBackgroundColor:[UIColor clearColor]];
[pickerLabel setFont:[UIFont boldSystemFontOfSize:14]];
}
//设置分割线的颜色
for(UIView *singleLine in pickerView.subviews)
{
if (singleLine.frame.size.height < 1)
{
singleLine.backgroundColor = [UIColor magentaColor];
}
}
pickerLabel.text = [self pickerView:pickerView titleForRow:row forComponent:component];
return pickerLabel;
}
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