iOS -以编程方式添加具有不同目标的按钮，始终调用最后添加的按钮目标

Question

我以编程方式向UI添加了两个按钮，如下所示。

这两个按钮有不同的目标，但不知何故，它们都调用最后添加的按钮操作。

例如，对于下面的代码，两个按钮都调用'btnResendCallAction‘方法。

任何帮助都将不胜感激。

self.btnResendSMS = [UIButton buttonWithType:UIButtonTypeCustom];
[self.btnResendSMS setFrame:CGRectMake( edge, btn_y, self_w -edge*2, 150)];
[self.btnResendSMS setTitle:strBtnTitle forState:UIControlStateNormal];
//[self.btnResendSMS setTintColor:[UIColor blueColor]];
[self.btnResendSMS setTitleColor:[UIButton buttonWithType:UIButtonTypeCustom].tintColor forState:UIControlStateNormal];
[self.btnResendSMS addTarget:self action:@selector(btnResendSMSAction) forControlEvents:UIControlEventTouchUpInside];
[self.btnResendSMS setEnabled:NO];
[self.btnResendSMS setAlpha:0.3f];
[self.view addSubview:self.btnResendSMS];


self.btnResendCall = [UIButton buttonWithType:UIButtonTypeCustom];
[self.btnResendCall setFrame:CGRectMake( edge, btn_y + 60, self_w -edge*2, 150)];
[self.btnResendCall setTitle:strBtnTitleCall forState:UIControlStateNormal];
//[self.btnResendSMS setTintColor:[UIColor blueColor]];
[self.btnResendCall setTitleColor:[UIButton buttonWithType:UIButtonTypeCustom].tintColor forState:UIControlStateNormal];
[self.btnResendCall addTarget:self action:@selector(btnResendCallAction) forControlEvents:UIControlEventTouchUpInside];
[self.btnResendCall setEnabled:NO];
[self.btnResendCall setAlpha:0.3f];
[self.view addSubview:self.btnResendCall];

Answer 1

实际上，使用该代码，我希望按钮重叠。但这并不明显，因为它们有清晰的背景，没有边界。因此，您认为您正在轻敲按钮1，但您正在轻敲覆盖它的按钮2的部分。

只给按钮2一个红色的背景颜色，这会更明显。