NSStringFrom...

[xaoxuu]

NSStringFromBool

Convert a boolean value to Objective-C string.

将BOOL值转换成Objective-C字符串

NSString *string = NSStringFromBool(BOOL x);
// x = YES, string = @"1"
// x = NO,  string = @"0"

NSStringFromFloat

Convert a float value to Objective-C string.

将float类型转换成Objective-C字符串

NSString *string = NSStringFromFloat(float x);
// x = 1,    string = @"1"
// x = 3.14, string = @"3.14"

NSStringFromCGFloat

Convert a CGFloat value to Objective-C string.

将CGFloat类型转换成Objective-C字符串

NSString *string = NSStringFromCGFloat(CGFloat x);
// x = 1,    string = @"1"
// x = 3.14, string = @"3.14"

NSStringFromInt / NSInteger / NSUInteger

Convert a int / NSInteger / NSUInteger to Objective-C string.

将int类型、NSInteger类型、NSUInteger类型转换成Objective-C字符串

NSString *string1 = NSStringFromInt(int x);
NSString *string2 = NSStringFromNSInteger(int x);
NSString *string3 = NSStringFromNSUInteger(int x);
// x = 1, string1 = @"1", string2 = @"1", string3 = @"1"

NSStringFromPointer

Convert a pointer to Objective-C string.

将id类型指针地址转换成Objective-C字符串

NSString *string = NSStringFromPointer(id x);
// string may be anything like @"0x10b70a5c0"...

NSStringFromPercent

Convert a percent to Objective-C string.

将百分比数值（float，取值0~1）转换成Objective-C字符串

NSString *string = NSStringFromPercent(id x);
// x < 0 or x = 0, string = @"0%"
// x = 0.123, string = @"12.3%"
// x > 1 or x = 1, string = @"100%"

NSStringFromASCIIValue

Convert a ASCII value to Objective-C string.

将单个ASCII码转换成Objective-C字符串

NSString *string = NSStringFromASCIIValue(id x);
// x = 32, string = @" "
// x = 48, string = @"0"
// x = 65, string = @"A"
// x = 90, string = @"Z"
// x = 97, string = @"a"
// x = 122, string = @"z"