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UIPickerView *pickerView = [[UIPickerView alloc] initWithFrame:CGRectZero];
pickerView.autoresizingMask = UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth; //这里设置了就可以自定 义高度了，一般默认是无法修改其216像素的高度
pickerView.dataSource = self; //这个不用说了瑟
pickerView.delegate = self; //这个不用说了瑟
pickerView.frame = CGRectMake(0, 84, 320, 100);
pickerView.showsSelectionIndicator = YES; //这个最好写 你不写来试下哇
[self.view addSubview:pickerView];
[pickerView release];
／／／／／／／／／／完美分隔线／／／／／／／／／／／／／／／／／／／／／／／／#pragma mark -
#pragma mark UIPickerViewDataSource
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView*)pickerView
{
return 2; //这个picker里的组键数
}
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
return [self.pickerNameArray count]; //数组个数
}
#pragma mark -
#pragma mark UIPickerViewDelegate
/************************重头戏来了************************/
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
UILabel *myView = nil;
if (component == 0) {
myView = [[[UILabel alloc] initWithFrame:CGRectMake(0.0, 0.0, 100, 30)] autorelease];
myView.textAlignment = UITextAlignmentCenter;
myView.text = [pickerNameArray objectAtIndex:row];
myView.font = [UIFont systemFontOfSize:14]; //用label来设置字体大小
myView.backgroundColor = [UIColor clearColor];
}else {
myView = [[[UILabel alloc] initWithFrame:CGRectMake(0.0, 0.0, 180, 30)] autorelease];
myView.text = [pickerPlaceArray objectAtIndex:row];
myView.textAlignment = UITextAlignmentCenter;
myView.font = [UIFont systemFontOfSize:14];
myView.backgroundColor = [UIColor clearColor];
}
return myView;
}
- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component
{
CGFloat componentWidth = 0.0;
if (component == 0)
componentWidth = 100.0; // 第一个组键的宽度
else
componentWidth = 180.0; // 第2个组键的宽度
return componentWidth;
}
- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component
{
return 40.0;
}
好 了， 下面看哈效果
UIPickerView用法(左右比例，整体大小，字体大小)
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原文地址：http://www.cnblogs.com/niit-soft-518/p/4629726.html
