iOS笔记之UIKit_UIButton

//UIButton的基本属性

_btn = [UIButton buttonWithType:UIButtonTypeCustom];

_btn.frame = CGRectMake(0, 200, 90, 90);

_btn.backgroundColor = [UIColor redColor];

_btn.tag = 100;

[_btn setTitle:@"我爱你" forState:UIControlStateNormal ];

[_btn setTitleColor:[UIColor purpleColor] forState:UIControlStateNormal ];

[_btn addTarget:self action:@selector(btnClick:) forControlEvents: UIControlEventTouchUpInside];

//设置button的圆角、边框

_btn.layer.cornerRadius  =10;

_btn.layer.borderWidth = 5.0;

_btn.layer.borderColor = [UIColor blueColor].CGColor;

//设置button标签文字的颜色

[_btn setTitleColor:[UIColor purpleColor] forState:UIControlStateNormal];

//标签文字的字体

[_btn.titleLabel setFont:[UIFont systemFontOfSize:28]];

_btn.tag = 101;

[self.view addSubview:_btn];

UIButton*bnt = [UIButton buttonWithType:UIButtonTypeSystem];

bnt.frame = CGRectMake(60, 300, 80, 80);

//button的颜色

bnt.backgroundColor = [UIColor grayColor];

bnt.layer.cornerRadius = 40;

bnt.layer.borderColor = [UIColor redColor].CGColor;

bnt.layer.borderWidth  = 5.0;

[bnt setTitle:@"mapanguan" forState:UIControlStateNormal ];

[bnt setTitleColor:[UIColor purpleColor] forState:UIControlStateNormal ];

[bnt.titleLabel setFont:[UIFont systemFontOfSize:20]];

bnt.tag = 102;

//添加点击事件

[bnt addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchDragOutside];

[self.view addSubview:bnt];

}

-(void)btnClick:(UIButton*)btn{

if (101 == _btn.tag) {

NSLog(@"按钮被点击了");

//点击显示随机颜色（需先定义）

int index = arc4random()%[self.colors count];

self.btn.backgroundColor = self.colors[index];

}

}