4.8 Swift中switch语句区间和元组模式匹配

@H_673_15@// switch 的广义匹配@H_673_21@

@H_673_21@

let x = 1000@H_673_21@

@H_673_21@

// 也就是说并没有像C语言那样 要求 switch 后面的是整数常量@H_673_21@

@H_673_21@

switch x {@H_673_21@

@H_673_21@

@H_673_15@ // case后面可以跟区间啦@H_673_21@

case 1...9:@H_673_21@

print("个位数")@H_673_21@

case 10...99:@H_673_21@

print("十位数")@H_673_21@

case 100...999:@H_673_21@

print("百位数")@H_673_21@

case 1000...9999:@H_673_21@

print("千位数")@H_673_21@

@H_673_21@

default:@H_673_21@

print("不符合")@H_673_21@

}@H_673_21@

@H_673_21@

@H_673_21@

@H_673_21@

let point = (10,10)@H_673_21@

@H_673_15@ // switch 后面可以跟一个元组类型@H_673_21@

switch point {@H_673_21@

case (0,0):@H_673_21@

print("坐标原点")@H_673_21@

case (1...10,1...10):@H_673_21@

@H_673_15@ print@H_673_15@("x和y坐标范围是位于1-10之间的"@H_673_15@)@H_673_21@

@H_673_21@

case(_,27)">点在 x 轴上")@H_673_21@

@H_673_21@

default:@H_673_21@

print("其他")@H_673_21@

}@H_673_21@