设置按钮为不可按：setEnable

[button setEnable:NO];

设置变灰：setAlpha

[button setAlpha:0.4];

设置按钮图像：setImage

[button setImage:[UIImage imageNamed:@"choice"] forState:UIControlStateNormal];

设置按钮标题：setTitle

[button setTitle:@"按钮"];

判断按钮是否透明：isTransparent

[button isTransparent];

设置按钮是否透明：setTransparent

//透明

[button setTransparent:YES];

//不透明

[button setTransparent:NO];

判断边框是否显示边框：showsBorderOnlyWhileMouseInside

[button showsBorderOnlyWhileMouseInside];

[button setShowsBorderOnlyWhileMouseInside:YES];

iOS 按钮设置