xcode UIBarButtonItem 背景图片和设置动作
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xcode UIBarButtonItem background image and setting action
提问by Nizzre
I created button in navigation bar with this code:
我使用以下代码在导航栏中创建了按钮：
UIBarButtonItem *myButtonEn = [[UIBarButtonItem alloc] initWithTitle:@"EN" style:UIBarButtonItemStyleDone target:self action:@selector(buttonEN:)];
My action for this button:
我对这个按钮的操作：
- (void) buttonEN:(id)sender {
NSLog(@"English language");
}
This works fine but I have to change background and button's style (code below).
这工作正常，但我必须更改背景和按钮的样式（下面的代码）。
UIImage *imageEN = [UIImage imageNamed:@"cys_lang_en.png"];
UIButton *buttonImgEN = [UIButton buttonWithType:UIButtonTypeCustom];
buttonImgEN.bounds = CGRectMake( 0, 0, imageEN.size.width, imageEN.size.height );
[buttonImgEN setImage:imageEN forState:UIControlStateNormal];
UIBarButtonItem *myButtonEn = [[UIBarButtonItem alloc] initWithCustomView:buttonImgEN];
This is axactly what I need, but I need to set action
这正是我需要的，但我需要采取行动
[myButtonEn setTarget:self];
[myButtonEn setAction:@selector(buttonEN:)];
This code is compiled with no errors but button does not respond.
此代码编译时没有错误，但按钮没有响应。
Does anyone know what is wrong?
有谁知道出了什么问题？
回答by ggg_1120
try this..
- (void)viewDidLoad
{
[super viewDidLoad];
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
[btn setFrame:CGRectMake(0.0f, 0.0f, 25.0f, 40.0f)];
[btn addTarget:self action:@selector(buttonEN:) forControlEvents:UIControlEventTouchUpInside];
[btn setImage:[UIImage imageNamed:@"cys_lang_en.png"] forState:UIControlStateNormal];
UIBarButtonItem *eng_btn = [[UIBarButtonItem alloc] initWithCustomView:btn];
self.navigationItem.rightBarButtonItem = eng_btn;
}
-(void)buttonEN:(id)sender
{
NSLog(@"English language");
}
回答by Toseef Khilji
You are Missing actionand targetfor button
你是失踪action和target按钮
You can set using,
您可以设置使用，
[myButtonEn setTarget:self];
[myButtonEn setAction:@selector(buttonEN:)];
回答by ninja_iOS
You might want to change apperance of this button.
您可能想要更改此按钮的外观。
[[UIBarButtonItem appearance] setBackgroundImage:<doneBackgroundImage>
forState:UIControlStateNormal
style:UIBarButtonItemStyleDone
barMetrics:UIBarMetricsDefault];
回答by shannoga
You don't need to use custom view for image, Try to use:
您不需要为图像使用自定义视图，请尝试使用：
UIBarButtonItem *btn = [[UIBarButtonItem alloc] initWithImage:yourImage style:UIBarButtonItemStylePlain target:target action:@selector(selector)];
