如何读取UITextView
在情节提要中创建的 x、y 位置和宽度?
在运行时,我需要在 UITextBox 正下方以编程方式创建其他对象吗?并且所有运行时创建的对象都必须基于 storyboard 的位置UITextView
。
我找不到答案。我尝试过的代码(如下)返回 0,0
在.h...
@interface ataglance_central_controller : UIViewController
{
IBOutlet UITextView *transmitter_box;
}
在.m.......
enter code here
#import "ataglance_central_controller.h"
#import <CoreBluetooth/CoreBluetooth.h>
#import <QuartzCore/QuartzCore.h>
#import "TransferService.h"
@interface ataglance_central_controller () <CBCentralManagerDelegate, CBPeripheralDelegate>
{
UITextView* battery_status_textview;
}
@property (strong, nonatomic) IBOutlet UITextView *textview;
@property (strong, nonatomic) CBCentralManager *centralManager;
@property (strong, nonatomic) CBPeripheral *discoveredPeripheral;
@property (strong, nonatomic) NSMutableData *data;
@end
@implementation ataglance_central_controller
-(void)viewDidLoad
{
NSLog(@" ataglance_central_controller.m viewDidLoad. ");
[super viewDidLoad];
NSLog(@" x <<<<<<<<<<<<<<<<<<< b %f", transmitter_box.frame.origin.x );
NSLog(@" y <<<<<<<<<<<<<<<<<<< b %f", transmitter_box.frame.origin.y );
}
-(void)viewDidLayoutSubviews
{
NSLog(@" x viewDidLayoutSubviews %f", transmitter_box.frame.origin.x );
NSLog(@" y viewDidLayoutSubviews %f", transmitter_box.frame.origin.y );
}
日志
2013-05-21 12:12:10.708 DW x2[447:c07] ataglance_central_controller.m viewDidLoad.
2013-05-21 12:12:10.709 DW x2[447:c07] x <<<<<<<<<<<<<<<<<<< b 0.000000
2013-05-21 12:12:10.709 DW x2[447:c07] y <<<<<<<<<<<<<<<<<<< b 0.000000
2013-05-21 12:12:10.712 DW x2[447:c07] Battery status is unknown.
2013-05-21 12:12:10.743 DW x2[447:c07] x viewDidLayoutSubviews 270.000000
2013-05-21 12:12:10.744 DW x2[447:c07] y viewDidLayoutSubviews 12.000000