Question

我在故事板中创建了一个按钮，并将其与头文件中的IBAction相关联。如何将此按钮的标题设置为我创建的变量displayPhone并让它也调用该号码？

·H

#import <UIKit/UIKit.h>
#import <Parse/Parse.h>

@interface IBThirdViewController : UIViewController

@property (nonatomic, strong) PFRelation *agentRelation;
@property (nonatomic, strong) NSArray *agent;
@property (weak, nonatomic) IBOutlet UILabel *agentName;
@property (strong, nonatomic) IBOutlet UILabel *agentPhone;
@property (strong, nonatomic) IBOutlet UILabel *agentEmail;
@property (strong, nonatomic) IBOutlet UIImageView *agentImage;

- (IBAction)phoneButton:(id)sender;

@end

的.m

#import "IBThirdViewController.h"
#import "IBAgentsTableViewController.h"

@interface IBThirdViewController ()    

@end

@implementation IBThirdViewController

- (void)viewDidLoad {
    [super viewDidLoad];
}

- (void)viewDidAppear:(BOOL)animated {        
    [super viewDidAppear:animated];

    //Find the Agent and show it
    self.agentRelation = [[PFUser currentUser] objectForKey:@"agentRelation"];
    PFQuery *query = [self.agentRelation query];

    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (!error) {
            // success

            self.agent = objects;
            // Do something with the found objects
            for (PFObject *object in objects) {
                NSLog(@"name: %@", [object objectForKey:@"name"]);
                NSLog(@"email: %@", [object objectForKey:@"email"]);

                NSString *displayEmail = [object objectForKey:@"email"];
                NSString *displayName = [object objectForKey:@"name"];
                NSString *displayPhone = [object objectForKey:@"phone"];

                PFFile *thumbnail = [object objectForKey:@"profilePic"];
                NSURL *imageFileURL = [[NSURL alloc] initWithString:thumbnail.url];
                NSData *imageData = [NSData dataWithContentsOfURL:imageFileURL];


                self.agentEmail.text = displayEmail;
                self.agentName.text = displayName;
                self.agentPhone.text = displayPhone;
                self.agentImage.image = [UIImage imageWithData:imageData];                        
            }

        } else {
            // Log details of the failure
            NSLog(@"Error: %@ %@", error, [error userInfo]);
        }
    }];        
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segue.identifier isEqualToString:@"showEditAgent"]) {
        IBAgentsTableViewController *viewController = (IBAgentsTableViewController *)segue.destinationViewController;

        viewController.agents = [NSMutableArray arrayWithArray:self.agent];
    }
}

- (IBAction)phoneButton:(id)sender {

}

@end

Answer 1

首先，你需要xib中的连接按钮和IBOutlet对象：

@property (nonatomic, weak) IBOutlet UIButton *displayPhone;

然后在加载数据后在-(void)viewDidAppear:(BOOL)animated中设置它的标题：

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    //...
    // Load data here
    //...
    [self.displayPhone setTitle:displayPhone forState:UIControlStateNormal];
}

最后为按钮实现IBAction方法：

- (IBAction)phoneButton:(id)sender {
    NSString *phone = [sender titleForState:UIControlStateNormal];
    // Remove all chars except of digits
    static NSString *const kDigitsString = @"0123456789";
    phone = [[phone componentsSeparatedByCharactersInSet:[[NSCharacterSet characterSetWithCharactersInString:kDigitsString] invertedSet]] componentsJoinedByString:@""];
    // Initiate call
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:[NSString stringWithFormat:@"tel:%@", phone]]];
}

Answer 2

看起来您还没有将按钮连接到插座，只能连接到操作。

首先，您需要将其连接到插座（就像您使用标签一样）。

然后使用......

[self.button setTitle:@"blah" forState:UIViewControlStateNormal];

无论如何都是这样的。我目前在iPhone上，所以我没有自动完成。

Answer 3

如果要更改IBAction方法内的标题，请执行以下操作：

[sender setTitle:@"My title" forState:UIControlStateNormal];

如果您想在任何其他地方进行更改，您需要@property of uibutton，类似这样的

@property (strong, nonatomic) IBOutlet UIButton *phoneButtonProperty;

并将其连接到您的按钮，然后

[phoneButtonProperty setTitle：@“我的标题”forState：UIControlStateNormal];

以编程方式设置按钮标题

3 个答案: