不是每个界面都写一遍
UIImage image = [UIImage imageNamed:imagePath];
UIButton button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(0.0, 0.0, image.size.width, image.size.height);
[button setImage:image forState:UIControlStateNormal];
[button setImage:[UIImage imageNamed:highLightImagePath] forState:UIControlStateHighlighted];
[button addTarget:self action:selector forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];
能不能有一个统一的方法统一设置?
你可以把这个加到一个单独的global-variables文件中,像这样:
GlobalVariable.h
+(UIBarButtonItem*)customButton;
GlobalVariable.m
+(UIBarButtonItem*)customButton{
UIImage image = [UIImage imageNamed:imagePath];
UIButton button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(0.0, 0.0, image.size.width, image.size.height);
[button setImage:image forState:UIControlStateNormal];
[button setImage:[UIImage imageNamed:highLightImagePath] forState:UIControlStateHighlighted];
[button addTarget:self action:selector forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem* btn = [[UIBarButtonItem alloc] initWithCustomView:button];
return btn;
}
然后,在你想要按钮出现的view中import GlobalVariable.h,然后调用
self.navigationItem.leftBarButtonItem = [GlobalVariable customButton];
你可以一直用这个 GlobalVariable,以防你在其他的variables中也需要用到。
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